Kliknij ten link, aby zobaczyć inne rodzaje publikacji na ten temat: SEED VIGOUR.
Artykuły w czasopismach na temat „SEED VIGOUR”
Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych
Sprawdź 50 najlepszych artykułów w czasopismach naukowych na temat „SEED VIGOUR”.
Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.
Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.
Przeglądaj artykuły w czasopismach z różnych dziedzin i twórz odpowiednie bibliografie.
1
Nikolić, Zorica, Zlatica Miladinov, Sanja Vasiljević, Snežana Katanski, Gordana Tamindžić, Dragana Milošević i Gordana Petrović. "Legume vigour". Acta agriculturae Serbica 26, nr 51 (2021): 19–26. http://dx.doi.org/10.5937/aaser2151019n.
Pełny tekst źródłaStreszczenie:
Seed vitality and vigour are the two most common parameters related to seed quality. It is crucial to have reliable methods and tests for seed quality and seed vigour testing. The standard germination test can be used to predict field emergence, but laboratory seed testing conditions are often in conflict with field conditions. Validated tests for vigour evaluation in legumes are the conductivity test, the accelerated ageing test and the tetrazolium test. Also, other types of vigour tests have been used to solve different problems in the seed sector. The modern approach, the computerised image analysis of legume seeds and sprouts, based on interactive and traditional methods, is a promising alternative for vigour determination.
2
Hassan, Fatima A., i Mai M. A. Hassan. "The Use of Seed Vigour Tests for Predicting Field Emergence". International Journal of Applied Science 1, nr 2 (19.12.2018): p93. http://dx.doi.org/10.30560/ijas.v1n2p93.
Pełny tekst źródłaStreszczenie:
The general aim of this study was to address the problem of seed vigour testing in Acacia senegal and Acacia mellifera) by studying different seed vigour tests and comparing them to identify the most suitable test for each species. The importance of this study lies in the fact that vigour testing measures the percentage of viable seeds in a sample as well as their ability to produce normal seedlings under less than optimum or adverse growing conditions, similar to those occurring in the field. To achieve this objective, a set of laboratory and field tests were conducted for the two Acacia species. Data collected included: The number of seeds per kilogram, germination percentage, seedling shoot length, seedling root length, seedling root wet and dry weight, seedling shoot wet and dry weight. The cutting test, electrical conductivity tetrazolium test and Hiltner test were employed to determine the seed vigour.
The results showed that Acacia mellifera had a high electrical conductivity, indicating its low seed vigour. The electrical conductivity of Acacia senegal was equivalent to that of distilled water, indicating that either the seed coat was intact or no ions were leached from the seeds. Comparison of the various tests suggests that Hiltner test is the most accurate” or “reliable”) test for seed vigor.
3
Verma, Omvati, i RS Verma. "Effect of seed coating material and storage containers on Germination and seedling Vigour of soybean (Glycine max L.)". SAARC Journal of Agriculture 12, nr 2 (6.02.2015): 16–24. http://dx.doi.org/10.3329/sja.v12i2.21913.
Pełny tekst źródłaStreszczenie:
A laboratory experiment was conducted to evaluate the effect of different seed coating materials and storage containers on germination, seedling vigour and suitability of packaging material for soybean seed. Seed of soybean varietyPS1024 was used for coating purpose with 6 coating treatments viz., T0 (control), T1 (Polymer coating i.e. Polykote @ 3 ml kg-1 of seed diluted with 5 ml of water), T2 (Flowable Thiram i.e. Royal flow 40 SC @ 2.4 ml kg-1 of seed), T3 (T1 + T2), T4 (Vitavax 200 i.e.thiram 37.5 % and carboxyl 37.5% @ 2 g kg-1 of seed and T5(T1+ T4). The coated seeds were stored in two kinds of containers i.e. jute canvas bag, high density poly ethylene (HDPE) non- laminated bag and bimonthly observation on germination and seedling vigour were recorded. After 8th month of storage, germination and vigour index in polythene bag stored seeds were significantly higher than the seed stored in cloth bag. Among seed coating treatments, maximum %germination was recorded in polymer coating @ 3 ml kg-1 followed by vitavax 200 @ 2 g kg-1of seed treatment (T5) which was significantly higher than rest of the coated treatment including untreated control seeds (T0 ). Similarly, maximum seed vigour index was observed in T5 and minimum vigor index was recorded with T0 (untreated control). DOI: http://dx.doi.org/10.3329/sja.v12i2.21913 SAARC J. Agri., 12(2): 16-24 (2014)
4
Jayasuriya, K. M. G. Gehan, Jerry M. Baskin, Dennis M. Tekrony i Carol C. Baskin. "Sensitivity cycling to physical dormancy break and seed vigour of twoIpomoeaspecies (Convolvulaceae)". Seed Science Research 19, nr 4 (grudzień 2009): 249–59. http://dx.doi.org/10.1017/s0960258509990158.
Pełny tekst źródłaStreszczenie:
AbstractThe physically dormant seeds ofIpomoea lacunosaand ofI. hederaceaundergo sensitivity cycling (insensitive ↔ sensitive) to dormancy-breaking treatment. Sensitivity cycling is important to seeds with physical dormancy in sensing appropriate environmental conditions for germination. Seed vigour is also important to seedling establishment, but no study has compared changes in vigour (or not) with changes in sensitivity. This study was conducted to determine the relationship between sensitivity cycling and seed vigour inI. lacunosaandI. hederacea. The seed moisture contents of insensitive and sensitive seeds ofI. lacunosaand of sensitive seeds ofI. hederaceawere measured, and several vigour tests were performed. Vigour of sensitive seeds ofI. lacunosadecreased more rapidly than that of insensitive seeds. No significant change in vigour was observed in either permeable or impermeable seeds ofI. hederacea. We conclude that sensitivity cycling to physical dormancy break is important in maintaining vigour ofI. lacunosaseeds in the soil seed-bank.
5
Kanwar, Rajesh, i D. K. Mehta. "Studies on solid matrix priming of seeds in bitter gourd (Momordica charantia L.)". Journal of Applied and Natural Science 9, nr 1 (1.03.2017): 395–401. http://dx.doi.org/10.31018/jans.v9i1.1202.
Pełny tekst źródłaStreszczenie:
A study was carried out to evaluate the effect of solid matrix priming of seeds on emergence (%), growth and fruit yield characters of bitter gourd (Momordica charantia L.) cultivar ‘Solan Hara’. The Experiment comprised of two vigour groups of seeds viz., ‘V1’ (High vigour seeds) and ‘V2’ (72 hours accelerated aged seeds/low vigour seeds) and five seed priming treatments viz., ‘P1’ (Solid matrix priming with Cocopeat), ‘P2’ (Solid matrix priming with Perlite), ‘P3’ (Solid matrix priming with Vermiculite), ‘P4’ (Seed soaking in water), ‘P5’ (Control -Without treatment).Investigation proved that low vigour seeds were inferior in respect of high vigour seeds in terms of seed physiological quality, emergence, growth and yield characteristics. Seed priming with Perlite for 72 hours proved its potential over other priming treatments, seed soaking and control (non-primed seeds) in both high vigour and low vigour seeds for agronomic attributes under study. High vigour seeds primed with Perlite ‘V1P2’ was found to be the best treatment for most of the traits understudy recording highest total field emergence (76.60%), fruit yield per plot (16.12 Kg) and per hectare (250.35 q). Similarly, Low vigour seeds primed with Perlite also recorded enhanced and improved total field emergence (73.83%) fruit yield per plot (9.28 Kg) and per hectare (143.26 q) compared to other low vigour treated and non treated seeds. From the present investigation it was inferred that that the extent of improvement w.r.t. attributes studied was more in low vigour seeds (V2) and seed priming with solid matrix carrier ‘Perlite’ can be used as a beneficial pre-sowing treatment to enhance the seedling emergence, growth and yield characteristics in bitter gourd.
6
Santos, Juliana F., Lynnette M. A. Dirk, A. Bruce Downie, Mauricio F. G. Sanches i Roberval D. Vieira. "Reciprocal effect of parental lines on the physiological potential and seed composition of corn hybrid seeds". Seed Science Research 27, nr 3 (24.04.2017): 206–16. http://dx.doi.org/10.1017/s0960258517000095.
Pełny tekst źródłaStreszczenie:
AbstractObtaining corn hybrid seeds (Zea mays L.) with high vigour depends on the parental lines and the direction of the cross, and this relates to seed desiccation tolerance and composition. This research studied reciprocal crosses between pairs of proprietary, elite parent lines (L1 and L5; L2 and L4) producing hybrid seeds with different qualities attempting to correlate vigour with seed composition, focusing on storage proteins, starch and soluble sugar amounts. Four corn hybrid seed lots produced from reciprocal crosses were compared (HS 15 with HS 51, and HS 24 with HS 42) by assessing germination, vigour, and seedling emergence in the field. Seed composition was assessed in mature, dehydrated seeds. Proteins were extracted, quantified, and analysed by electrophoresis and densitometry. Starch amounts were assessed using a kit and soluble sugars were determined using high performance liquid chromatography with pulsed electrochemical detection. The L1 and L2 lineages, used as female parents, provided seeds with lower vigour; however, the quantification of major protein bands, and sucrose, raffinose and stachyose were similar between seed lot pairs. While both total seed protein and starch varied between reciprocal hybrids for one of the two sets of crosses, the amounts of neither correlated with seed vigour. Interestingly, hybrids with low seed vigour (HS 15, HS 24) accumulated greater amounts of fructose relative to their reciprocal; correlation analysis confirmed these results. We demonstrate different effects on seed vigour dependent on the maternal parent in reciprocal crosses producing hybrid corn seeds. We also show that vigour is negatively correlated with seed reducing sugar contents.
7
Al-Amery, Maythem, Robert L. Geneve, Mauricio F. Sanches, Paul R. Armstrong, Elizabeth B. Maghirang, Chad Lee, Roberval D. Vieira i David F. Hildebrand. "Near-infrared spectroscopy used to predict soybean seed germination and vigour". Seed Science Research 28, nr 3 (11.05.2018): 245–52. http://dx.doi.org/10.1017/s0960258518000119.
Pełny tekst źródłaStreszczenie:
AbstractRapid, non-destructive methods for measuring seed germination and vigour are valuable. Standard germination and seed vigour were determined using 81 soybean seed lots. From these data, seed lots were separated into high and low germinating seed lots as well as high, medium and low vigour seed lots. Near-infrared spectra (950–1650 nm) were collected for training and validation samples for each seed category and used to create partial least squares (PLS) prediction models. For both germination and vigour, qualitative models provided better discrimination of high and low performing seed lots compared with quantitative models. The qualitative germination prediction models correctly identified low and high germination seed lots with an accuracy between 85.7 and 89.7%. For seed vigour, qualitative predictions for the 3-category (low, medium and high vigour) models could not adequately separate high and medium vigour seeds. However, the 2-category (low, medium plus high vigour) prediction models could correctly identify low vigour seed lots between 80 and 100% and the medium plus high vigour seed lots between 96.3 and 96.6%. To our knowledge, the current study is the first to provide near-infrared spectroscopy (NIRS)-based predictive models using agronomically meaningful cut-offs for standard germination and vigour on a commercial scale using over 80 seed lots.
8
Mellish and B. Coulman, A. "Seed weight, emergence and seedling vigour of four tetraploid crested wheatgrass populations". Canadian Journal of Plant Science 83, nr 1 (1.01.2003): 69–70. http://dx.doi.org/10.4141/p01-119.
Pełny tekst źródłaStreszczenie:
This study compared the seed weight, and seedling emergence vigor of four tetraploid crested wheatgrass populations. S9240H, a population selected for seed size, had larger seeds than the cultivars Kirk and CD-II. Heavy seeds had greater emergence and heavier seedlings than light seeds, but there were no differences in these characters among the four populations. Key words: Crested wheatgrass, seed size, seedling vigour
9
P, SRIMATHI, i RAMASAMY K.R. "QUALITY OF SEED IN RELATION TO POSITION OF SEED IN THE PODS OF COWPEA". Madras Agricultural Journal 79, Augest (1992): 448–50. http://dx.doi.org/10.29321/maj.10.a01778.
Pełny tekst źródłaStreszczenie:
Quality estimation of the seeds of cowpea cv Co2 collected from different positions of the seed in the pods were made. The estimations viz; seed size, weight, germination and vigour of the seeds collected from the distal and other portions did not vary widely excepting the reduced vigour of the seedlings of smaller sized seed. The distal and seeds recorded higher germination and lower vigour compared to others.
10
Dryha, V. V., V. A. Doronin, Yu A. Kravchenko, V. V. Doronin i S. D. Orlov. "The effect of the storage conditions on the quality of switchgrass seeds of different 1000-kernel weight". Scientific Papers of the Institute of Bioenergy Crops and Sugar Beet, nr 30 (26.12.2022): 26–32. http://dx.doi.org/10.47414/np.30.2022.269016.
Pełny tekst źródłaStreszczenie:
Purpose. Revealing the effect of the storage conditions for switchgrass seeds of different varieties and 1000-kernel weight on germination and seed vigour. Methods. Laboratory (determination of seed vigour and seed germination), measurement and weighting (determination of the 1000-kernel weight), and mathematical and statistical methods were used in the research. Results. It has been proven that seed vigour and germination naturally decreased along with a decrease in the 1000-kernel weight. On average, the lowest quality indicators were obtained for the seeds with the 1000-kernel weight of 1.24 g, however, during eight months of its storage, no natural decrease in the seed vigour and germination occurred. The quality of seeds with a greater 1000-kernel weight (1.67 g) was significantly higher and amounted to 55 and 58%. The smaller 1000-kernel weight, the lower was seed vigour and germination during storage for three and eight months was observed. No significant increase or decrease in seed quality was found depending on the 1000-kernel weight and the storage period. Similar results of the seed quality were obtained in the seed samples of different varieties. Seeds ‘Cave-in-rock’ variety with a 1000-kernel weight of 0.63 g had the lowest germination vigour, both at the beginning of the experiment and during eight months of storage; however, it did not depend on the storage period. Conclusions. On average of variety samples, a natural increase in seed vigour and germination occurs along with an increase in the 1000-kernel weight. At the same time, a natural increase in the seed quality of different 1000-kernel weight depending on the storage period was not found. On the contrary, seed vigour and germination were lower than in the control (at placing seeds for storage).
11
K, MALARKODI, i DHARMALINGAM C. "EFFICACY OF PRE STORAGE TREATMENTS TO CONTROL SEED DETERIORATION IN BAJRA cv. CO 7 SEED LOTS OF DIFFERENT SEED QUALITY". Madras Agricultural Journal 85, December (1998): 637–40. http://dx.doi.org/10.29321/maj.10.a00823.
Pełny tekst źródłaStreszczenie:
High, medium and low vigour seeds of bajra ev. CO 7 were subjected to hydration- dehydration (H-DH) and halogenation treatments to prolong storability under ambient conditions. H-DH exerted excellent effects on medium and low vigour seeds while halogenation treatments conferred best effect on medium and low vigour seeds and to a certain extent or high vigour seeds. The improvement in germination for H-DH was 3. 33 and 50 per cent for high, medium and low vigour seeds and 89, 24 and 40 per cent for halogenation treatments, respectively. The invigoration effect was significantly evident from vigour index value, dehydrogenase enzyme activity and field emergence percentage as compared to control in all seed vigour groups.
12
Scott, D. J., i J. G. Hampton. "ASPECTS OF SEED QUALITY". NZGA: Research and Practice Series 2 (1.01.1985): 43–52. http://dx.doi.org/10.33584/rps.2.1985.3300.
Pełny tekst źródłaStreszczenie:
Seed quality refers to a number of seed properties which may have varying degrees of practical importance for agriculture. As well as the traditional purity and germination capacity of seedlots, seed quality also includes species purity, cultivar purity, vigour, seed size, seedlot uniformity, seed health and seed moisture content. The quality of New Zealand herbage seedlots is reviewed. Data are presented for weed seed contamination, germination, seed vigour and seed weight. The influence such factors as analytical and cultivar purity, freedom from weeds, vigour and seed health have on New Zealand's domestic and export seed trade is discussed. Keywords: Seed quality, herbage seed, analytical purity, weed seeds, cultivar purity, germination, vigour,
13
Kaur, Japneet, Seema Bedi, Rajinder Singh i Tavisha Singh. "Effect of priming on enhancing storability of high and low vigour brinjal (Solanum melongena L.) seeds". Journal of Applied Horticulture 25, nr 01 (10.03.2023): 48–53. http://dx.doi.org/10.37855/jah.2023.v25i01.08.
Pełny tekst źródłaStreszczenie:
The present study was on brinjal (Solanum melongena L.) seeds var. Punjab Nagina. The quality of brinjal seeds in terms of vigour and viability severely declines due to natural ageing during storage between harvesting and the next sowing season. This study aimed to evaluate the effect of various priming treatments on the quality and storability of brinjal seeds. The freshly harvested seed was divided into two lots. One of these seed lots was subjected to accelerated ageing to obtain low vigour seed and the other lot was considered to be high vigour. The high and low vigour seeds were primed with KNO3 (1%), GA3 (100ppm), KH2PO4 (0.1M), PEG 6000 (30%) and H2O, respectively for 12 hours at 25oC. The seeds were stored in moisture-impervious bags for 12 months in a refrigerator (4oC). The objective was to observe whether the priming treatments improve the seed vigour and retain the advantages obtained during storage. The seeds were drawn at three monthly intervals, viz., zero, three, six, nine and twelve months of storage to study germination percentage, speed of germination, mean days to germination, seedling length, root length, shoot length, seedling dry weight and seedling aand vigour index. With an increase in storage duration, a decline in the physiological aspect of seed quality was observed in both high and low vigour seeds. All the priming treatments improved the germination-related parameters in both high and low vigour seeds over control but the extent of improvement varied. Seed priming with GA3 (100ppm) and KNO3 (1%) were the best treatments for both high and low vigour seeds, even after storage for 12 months.
14
Saeidi, G., i G. G. Rowland. "The effect of temperature, seed colour and linolenic acid concentration on germination and seed vigour in flax". Canadian Journal of Plant Science 79, nr 3 (1.07.1999): 315–19. http://dx.doi.org/10.4141/p98-100.
Pełny tekst źródłaStreszczenie:
In Canada, the edible-oil type of flax (Linum usitatissimum) known as solin must have a linolenic acid concentration of less than 5% and a yellow seed colour. The yellow seed distinguishes solin from regular, high-linolenic acid linseed flax. Both altered fatty acid ratios and seed colour can have a negative impact on seed germination. The effects of temperature, seed colour and seed linolenic acid concentration on germination and seed vigour were studied in four populations that were near-isogenic for seed colour and linolenic acid level. For all populations, a germination temperature of 5 °C resulted in a significantly lower germination than at 10 or 15 °C. With one exception at 5 °C, where yellow seed had a greater germination than brown seed, there was no difference in germination frequency between brown and yellow seed. Also, there was no difference in germination between low and high linolenic acid seed with the exception of one population where low linolenic acid seeds had lower germination at 5 °C. In vigour tests however, yellow seed had lower seed vigour than brown seed in all populations. Low linolenic acid seeds had lower seed vigour than high linolenic acid seed in one population. Selection for seed vigour is essential in the breeding of solin varieties. Key words: Seed colour, linolenic acid, germination, seed vigour, flax
15
Hołubowicz, Roman, Xian Wang i Wiesław Siutaj. "Use of tetrazolium (TTC), Germ's and greenhouse plant emergences methods for testing seed vigour of selected ornamental plant species". Acta Agrobotanica 54, nr 2 (2013): 5–11. http://dx.doi.org/10.5586/aa.2001.017.
Pełny tekst źródłaStreszczenie:
In the years 1996-1997 the experiments were carried out on methods to investigate seed vigour of tassel flower (<i>Amaranthus caudatus</i> L.), sand pink (<i>Dianthus chinensis</i> L.), babies' breath (<i>Gypsophila elegans</i> M.B.), sweet pea (<i>Lathyrus odorathus</i> L.), African marigold (<i>Tagetes erecta</i> L.) and zinnia (<i>Zinnia elegans</i> Jasq.). The main goals of this research were to specify conditions for accelerated ageing (AA) of the seeds of a few selected ornamental plant species and to choose the most appropriate methods for their seed vigour evaluation in the laboratory and greenhouse conditions. All used in the experiments seeds came from the commercial seed lots from Polish seed company. Evaluation was carried out on the seed samples with high and low vigour. The latter ones were received through subjecting the seed samples to AA, i.e. by placing them in 100% relative humidity (RH) at 44°C, except African marigold-at 42°C, in the darkness and keeping them for 144, 88, 100, 48, 72 and 72 hours, respectively. The tested seed vigour estimated methods included the Germ's method, the 2,3,5-triphenyl tetrazoilum chloride (TTC) method and the test of plant emergences in the greenhouse. The high vigour seeds samples were used as a check. The Germ's method was found to be useful to evaluate sand pink, babies' breath and African marigold seed vigour, whereas the TTC method was found to be suitable for vigour evaluation of sand pink, babies' breath and zinnia. At present stage of our knowledge about seed vigour, the plant emergences in the greenhouse method was found to be the best for evaluation of seed vigour of tassel flower, sand pink, babies' breath, sweet pea and zinnia. It is reasonable to combine a few methods of seed vigour evaluation for ornamental plant species.
16
Abdullah, W. D., A. A. Powell i S. Matthews. "Association of differences in seed vigour in long bean (Vigna sesquipedalis) with testa colour and imbibition damage". Journal of Agricultural Science 116, nr 2 (kwiecień 1991): 259–64. http://dx.doi.org/10.1017/s0021859600077662.
Pełny tekst źródłaStreszczenie:
SUMMARYField emergence of 11 seed lots from six cultivars of long bean, all having laboratory germination of > 80%, ranged from 0 to 83%, indicating differences in seed vigour. Vigour differences occurred within and between cultivars, seed lots from cultivars with white or partly white testas having particularly poor emergence (0–21%) compared with those with brown or black testas (41–83% field emergence). The significant ranked correlations between field emergence and (i) solute leakage, measured by the electrical conductivity of seed soak water (r = –0·864), (ii) the percentage of cotyledons made up of completely living tissue, revealed by vital staining (r = 0·895), and (iii) the proportion of hard seeds (r = 0·916) indicated that lots with low vigour and potentially poor field emergence could be identified before sowing. Seed lots having low vigour imbibed water rapidly; the improved vital staining when seeds imbibed slowly indicated that damage occurred during imbibition and was a cause of low seed vigour. Rapid water uptake by low-vigour seed lots was partly explained by the incidence of seeds with cracked testas, but other factors could not be eliminated. The significance of differences in water uptake between cultivars differing in testa colour is discussed in relation to breeding for improved emergence.
17
Negi, Pitambar, Ashwani Tapwal, Jawala Prasad, Monika i Anu Sharma. "Influence of seed sources on germination and seedling vigour of Pinus gerardiana". Indian Journal of Forestry 45, nr 1 (30.07.2022): 20–23. http://dx.doi.org/10.54207/bsmps1000-2022-08x864.
Pełny tekst źródłaStreszczenie:
An experiment was conducted to study the influence of seed sources on seed germination and seedling vigour of Pinus gerardiana seeds collected from 23 seed sources during October, 2018 in Kinnaur and Chamba districts of Himachal Pradesh. The seeds were subjected to germination testing to identify the best seed source for raising Pinus gerardiana seedlings in the nursery. Significant differences were observed in germination percent, average seedling length and seedling vigour of seeds collected from different seed sources. The maximum germination of 83.00% was recorded in seeds collected from Jangi seed source followed by 74.00% germination in seeds collected from Purbani, 71.00% germination in seeds collected from Moorang in Kinnaur Forest Division whereas minimum germination of 36.00% germination was recorded in seeds collected from Luj in Pangi Forest Division. Similarly, maximum seedling length of 11.10 cm was recorded in seeds collected from Jangi followed by 10.50 cm in seeds collected from Purbani and 10.21 cm in seeds collected from Moorang in Kinnaur Forest Division whereas minimum seedling length of 7.70 cm was recorded from seeds collected from Luj in Pangi Forest Division. The maximum seedling vigour index of 921 was recorded in seeds collected from Jangi followed by seedling vigour index of 777 from Purbani and seedling vigour index of 724 from Moorang in a decreasing order whereas minimum seedling vigour index of 277 was recorded in seeds collected from Luj in Pangi Forest Division. It is recommended on the basis of present investigation that seeds of Pinus gerardiana should be collected from Jangi seed source in Kinnaur district for raising quality seedlings in the nursery.
18
Wang, Xiaomin, Qiyuan Tang i Wenwei Mo. "Seed filling determines seed vigour of superior and inferior spikelets during hybrid rice (Oryza sativa) seed production". Seed Science and Technology 48, nr 2 (31.08.2020): 143–52. http://dx.doi.org/10.15258/sst.2020.48.2.01.
Pełny tekst źródłaStreszczenie:
Growth and development of spikelets are asynchronous during hybrid rice seed production. However, knowledge is limited about the variation in seed vigour between superior and inferior spikelets. The main objective of this study was to evaluate the differences in seed vigour between superior and inferior spikelets of hybrid rice, and to explore the mechanisms associated with such variations with regards to seed filling characteristics and starch accumulation. Field experiments were conducted in 2017 and 2018, and seed vigour parameters, seed filling characteristics and starch accumulation were determined. We found that significant differences were recorded in seed vigour parameters between superior and inferior spikelets. Germination percentage (GP) and vigour index (VI) of superior spikelets were higher than that of inferior spikelets, irrespective of year or variety. Moreover, significant differences were observed in seed filling characteristics and starch accumulation between superior and inferior spikelets. Lower total starch content, amylose content and amylopectin content were recorded in inferior spikelets with low seed filling rate and long seed filling duration. Superior spikelets with high seed filling rate and short seed filling duration increased final seed weight by 23.9 and 22.3% for each variety, respectively. Therefore, these results raise the possibility that seed filling influences the starch accumulation and seed weight, and is closely associated with differences in the vigour of seeds from superior and inferior spikelets during hybrid rice seed production.
19
Bourgeois, Luc, Jack Moes i Elmer H. Stobbe. "Impact of threshing on hard red spring wheat seed vigour". Canadian Journal of Plant Science 76, nr 2 (1.04.1996): 215–21. http://dx.doi.org/10.4141/cjps96-040.
Pełny tekst źródłaStreszczenie:
Improper handling of seed during harvesting may result in severe seed vigour loss. The objective of this study was to determine, under field conditions, the effect of threshing on wheat seed vigour. A conventional combine and an axial flow rotary combine were used at three cylinder speeds. The proportion of visually damaged seeds was assessed for all samples, and subsequent vigour tests were conducted using visually sound seed. Seed vigour was reduced when wheat was threshed at a high cylinder speed. Wheat kernels threshed with the rotary combine were less damaged than wheat kernels threshed with the conventional combine. Both seedling emergence and grain yield were reduced by 20 plants m−2 and by 200 kg ha−1, respectively, in plots seeded with kernels threshed at a high cylinder speed compared with kernels threshed at a low cylinder speed. Vigour of sound wheat kernels was negatively correlated with the number of broken kernels in samples. To maintain high vigour in wheat seed, it is essential to thresh at a low cylinder speed. Key words: Wheat, seed vigour, threshing damage, rotary combine, conventional combine
20
Maydup, M. L., C. Graciano, J. J. Guiamet i E. A. Tambussi. "Analysis of early vigour in twenty modern cultivars of bread wheat (Triticum aestivum L.)". Crop and Pasture Science 63, nr 10 (2012): 987. http://dx.doi.org/10.1071/cp12169.
Pełny tekst źródłaStreszczenie:
Fast development of seedling leaf area is a relevant trait in order to increase early resource acquisition. The use of semi-dwarf genotypes of wheat has decreased early vigour of modern cultivars. We studied early vigour of 20 cultivars cropped in Argentina, and our main objectives were: (i) to analyse the genotypic variability in early vigour; (ii) to study morphological traits that can be good indicators of early vigour, such as seed mass, leaf width, and specific leaf area; and (iii) to determine whether increased dry mass allocation to roots impacts negatively on early vigour. Experiments with non-size-selected and size-selected seeds were carried out in a greenhouse. A field trial was also conducted in order to test the reliability of the greenhouse results. Seeds mass was the main parameter related to early vigour. However, results from the experiment with seeds selected by size (45–50 mg seed–1) showed that seed mass per se only partially explains early vigour, since a significant coefficient of determination was observed between the seedling leaf area of each cultivar in both experiments (i.e. with randomly chosen or size-selected seeds). We observed a high coefficient of determination between net assimilation rate and changes in the ranking of early vigour of the cultivars with time after transplant. Root biomass was positively correlated with leaf area, indicating that the traits were not mutually exclusive. We built simple models by multiple regression to predict early vigour, including some parameters that were easy to measure. Seed mass and leaf width taken together showed better fit than seed mass or leaf width alone. We found a significant coefficient of determination between early vigour in greenhouse and field experiments; thus, screening for early vigour under semi-controlled conditions may be feasible.
21
Sobha, J. S. Chauhan i Subhdara. "Seed Vigour Tests on seven Cultivars of Phaseolus vulgaris Grown in Chamoli District of Uttarakhand, India". Ecology, Environment and Conservation 28, nr 04 (2022): 2130–35. http://dx.doi.org/10.53550/eec.2022.v28i04.074.
Pełny tekst źródłaStreszczenie:
Rajmash (Phaseolus vulgaris L. family; fabaceae) is also known as kidney bean/ French bean. It is an annual plant and cultivated throughout the world for their edible beans. The present study was conducted to investigate the effect of seed vigour by germination test of different cultivars of Phaseolus vulgaris grown in Chamoli district of Uttarakhand. The experimental material constituted a collection of 7 cultivars (Red small, Red big, Grey, Pink, Yellow, Brown, White) of Phaseolus vulgaris. The seed samples of seven cultivars of Phaseolus vulgaris were taken from Joshimath, District Chamoli Garhwal Uttarakhand. Morphological aspects viz; seed weight, seed moisture content, seed density and seed diameter were recorded prior to germination test of Phaseolus vulgaris at Seed Testing Laboratory, Department of Seed Science and Technology, H.N.B Garhwal University. Seeds were sterilized with 0.2% sodium hypochlorite solution for germination test. Two replicates of each variety and 25 seeds in each replicates were kept in petriplates on whatman filter paper. Petriplates were kept in seed germinator at 25 ± 2 °C until final count. The number of normal seedling was counted at the final count, higher the number of normal seedlings greater is the seed vigour. The germination percentage was found 100% in five cultivars, and the other two cultivars showed 96.66% in yellow seeds and 68.33% in Grey cultivar of Phaseolus vulgaris. Brown cultivars represented maximum dry weight of root (0.029 g) while minimum dry weight of root has been recorded in yellow cultivar (0.01353 g). Maximum vigour index were recorded in brown cultivar and minimum was recorded in pink cultivar. The findings from the study indicate that brown cultivar of Phaseolus vulgaris is highly vigours.
22
Genna, Nicholas G., Christina Walters i Héctor E. Pérez. "Viability and vigour loss during storage of Rudbeckia mollis seeds having different mass: an intra-specific perspective". Seed Science Research 30, nr 2 (czerwiec 2020): 122–32. http://dx.doi.org/10.1017/s0960258520000161.
Pełny tekst źródłaStreszczenie:
AbstractRecent evidence points to relationships between intra-specific seed mass variation and viability loss in response to ageing stress. However, little is known about how seed quality may change temporally in response to such stress. Here we examined seed–water relations of mass-separated Rudbeckia mollis seeds to better understand physiological status among mass classes. We then evaluated seed viability and vigour changes in response to various storage conditions or post-storage vigour tests (a 41°C, 75% RH stress for up to 45 d). We found similar pre-storage physiology among mass classes. However, seeds of lower mass deteriorated up to 1.5-fold faster than heavier seeds under certain conditions. Stressing seeds after storage resulted in distinct vigour differences among mass classes. For example, vigour in lower mass seeds tended to decline more compared to heavier seeds following storage in a climate-controlled room. Alternatively, vigour loss varied among mass classes following storage in a non-climate-controlled shed. Our results highlight the importance of distinguishing between pre-sowing storage and post-storage vigour effects when quantifying relative levels of viability loss among seeds of different mass. Furthermore, differential responses to storage and ageing stress among mass classes may have important implications for post-storage regeneration and subsequent population dynamics.
23
Pantović, Jelena Golijan, Dušica Jovičić, Slavoljub Lekić i Mile Sečanski. "Counter Agronomic Systems and Maize Seed Vigour". Contemporary Agriculture 71, nr 3-4 (1.12.2022): 172–78. http://dx.doi.org/10.2478/contagri-2022-0023.
Pełny tekst źródłaStreszczenie:
Summary The quality and provenance of seed are of exceptional importance for the production and yield of cultivated plants. There are numerous tests for determination of seed vigour. The seed accelerated ageing test is one of the most important tests that provide determination of the degree of germination preservation and the seed longevity in storages. The aim of this study was to observe the effect of different production methods – organic and conventional – on seed vigour of maize (variety Rumenka), using the seed accelerated ageing test. Maize seeds were exposed to double stress conditions (temperature of 45 °C, air humidity of 100%) for 72h. Maize seed germination was determined by the standard germination test and was expressed as a percentage. The results of vigour of maize seeds organically produced indicated that the application of the seed accelerated ageing test increased the first count (78.5%) in relation to the standard germination test (70.75%), and a significantly higher percentage of nongerminated seeds (10.25%) were recorded. Furthermore, the radicle length decreased (120.75 mm), while the length of the seedling above-ground part (117.13 mm) and fresh weight (4.56 g) increased. In maize seeds conventionally produced, the first count and germination were higher (41.5% and 46.25%, respectively) after the application of the seed accelerated ageing test, while the percentage of nongerminated seeds were higher (38.75%). In addition, the length (105.88 mm) and fresh weight (4.43 g) of the seedling above-ground part decreased, while the values of the radicle length (137.5 mm), fresh weight (2.39 mm) and dry weight (0.28 mm) as well as dry weight of above-ground parts of seedlings (0.31 g) were higher than after the application of the standard laboratory method (127.88 mm, 1.89 g, 0.17 mm and 0.31 g, respectively).
24
Bettey, Mary, i W. E. Finch-Savage. "Respiratory enzyme activities during germination inBrassicaseed lots of differing vigour". Seed Science Research 6, nr 4 (grudzień 1996): 165–74. http://dx.doi.org/10.1017/s0960258500003226.
Pełny tekst źródłaStreszczenie:
AbstractThe rate of oxygen consumption by cabbage seeds increased on imbibition and there was a further sharp increase on germination. This was delayed in artificially aged seeds of low vigour. The increases in oxygen consumption reflect the increased oxidation of carbohydrates via respiratory pathways. The activities of key regulatory enzymes of glycolysis and the oxidative pentose phosphate pathway were measured in aged and unaged seed lots of cabbage. Differences in the activities of glucose 6-phosphate dehydrogenase and pyrophosphate:fructose 6-phosphate 1-phosphotransferase were correlated with the rate of germination (T50) in seed lots with large differences in seed vigour induced experimentally by artificial aging. However, the activities of these enzymes could not be used to distinguish between untreated seed lots which had smaller vigour differences apparent only under stress. The enzymes are presumably not controlling and determining seed vigour, but merely reflecting actual seed performance under the current conditions.
25
Orzeszko-Rywka, A., i S. Podlaski. "The effect of sugar beet seed treatments on their vigour". Plant, Soil and Environment 49, No. 6 (10.12.2011): 249–54. http://dx.doi.org/10.17221/4121-pse.
Pełny tekst źródłaStreszczenie:
Sugar beet seeds of three varieties (Jastra, Jamira, PNMono1) were rubbed, primed, washed and primed after rubbing. All used methods of seed treatment changed pericarp characteristics such as water potential, density, moisture and content of chemicals resulting in electrical conductivity of water extract from the seeds. Seed treatments also improved the ability and rate of germination. Their efficiency was more significant in an excess and shortage of water in germination medium than in optimum water conditions. The lower the initial seed vigour, the larger the vigour improvement. Seed priming had the best effect on the course of germination. Primed seeds were most resistant to different moisture conditions during germination. The largest differences in germination ability after four days in different water conditions were 5.1 and 7.4% for primed and primed after rubbing seeds, respectively, while the difference for control ones was 26.8%. Priming also caused an increase in seed respiration intensity. Rubbing and washing removed chemicals from the pericarp, which resulted in an increase in water potential, and consequently in vigour improvement.
26
Anbarasan, R., i P. Srimathi. "Influence of physical seed treatment on seed quality improvement in black gram (Vigna mungo L.)". Journal of Applied and Natural Science 8, nr 1 (1.03.2016): 46–49. http://dx.doi.org/10.31018/jans.v8i1.744.
Pełny tekst źródłaStreszczenie:
Pelleting is a physical pre-sowing seed management technique, in which seeds are enclosed with biopromotive substances to improve the field stand. To evaluate the efficacy of plant herbal powders for seed pelleting, studies were initiated with blackgram cv. ADT 3, in which seeds were pelleted with the leaf powders of noni (Morinda citrifolia) and basil (Ocimum sanctum) and fruit powder of gallnut (Terminalia chebula) @ 200 g kg-1 of seed using Carboxy methyl cellulose @ 200 ml per kilogram of seed as an adhesive. The results revealed that seeds pelleted with the leaf powders of either basil improved the seed germination by 6% and seedling vigour (23%), seedling length (9%) and seedling dry weight (5%). In raised bed nursery, the seeds pelleted with basil leaf powder @ 200 g kg-1 of seed recorded improved field emergence (7%) with higher chlorophyll index (30%) and nodule number (28%) highlighting the efficacy of the treatment. While, the seeds pelleted with gallnut fruit powder recorded lowest germination, vigour and field emergence which is significantly lesser than control. The delayed emergence, germination and vigour was due to the increase in hardiness of gallnut powder pelleted seed. Thus, the seeds treated with basil leaf powder @ 200 g kg-1 using carboxy methyl cellulose @ 200 ml per kilogram of seed as an adhesive, enhanced seed germination, vigour, seedling length and dry weight.
27
Ogunniyan, Dotun, Johnson Adetumbi, Julius Olasoji i Solomon Makinde. "The variability of grain yield, seed morphometric and vigour traits of early maturing hybrid maize". Journal of Agricultural Sciences, Belgrade 66, nr 2 (2021): 105–19. http://dx.doi.org/10.2298/jas2102105o.
Pełny tekst źródłaStreszczenie:
Breeding for yield and quality requires the assessment of the seed metrics and vigour traits. This study, therefore, assessed the variability and inter-dependence of grain yield (GY), seed morphometric and vigour traits in hybrid maize. Seeds of 75 early maturing hybrid maize varieties were evaluated for morphometric traits and quality in four replicates. A field trial laid out in a randomised complete block design with three replicates was also conducted in Ibadan, Nigeria, to determine the grain yield of the hybrids. Data collected on the GY, seed dimension and quality were subjected to analysis of variance. The least significant difference was used to separate means. Relationships among the GY, seed morphometric and vigour traits were determined using correlation coefficients, while principal component (PC) analysis was performed for variability among the hybrids. Significant differences (P<0.001) were found in the GY, seed dimension and vigour traits. Four of the nine highest yielding hybrids had ECT higher than 30.0 ?sg-1 cm-1. The GY correlated with seed diameter (SDT) (0.40**), seed width (SWD) (0.36**), seed length (SLG) (0.35**), seed area (SAR) (0.30**) and seed vigour (SVI) (0.30**). The SAG correlated with SDT, SLG, seed thickness (STH) and SAR. All the seed vigour traits correlated with one another. The PC I explained GY, SDT, SWD, SLG, SAR and SVI, indicating their importance in GY improvement. Seed angle, length and diameter were versatile in maize varietal selection. Identified high yielding hybrids with seed morphometric and vigour qualities can be explored by seed companies as innovation in the seed production business.
28
Owens, H. T., C. H. Finneseth, T. M. Tillery i T. D. Phillips. "Germination rate and seedling vigour of tall fescue as affected by endophyte status and seed density". NZGA: Research and Practice Series 13 (1.01.2007): 271–74. http://dx.doi.org/10.33584/rps.13.2006.3109.
Pełny tekst źródłaStreszczenie:
Forage grass seed quality is influenced by plant genetics as well as seed density, storage conditions, age of seed, and endophyte infection status. We used eight seed lots of tall fescue (three cultivars, with natural endophytes, endophyte-free, or novel endophyte) to test the effect of seed density on germination and seedling vigour. Seed lots were separated into nine density fractions using a cylinder air column. Thousand seed weight values were determined. Three runs of four replications of plots consisting of 25 seeds of each entry were seeded in greenhouse experiments to determine seedling mass at 8 weeks after planting. Early germination counts as well as laboratory germination tests indicated significant differences among weight classes in speed of germination as well as seedling vigour. The lightest fraction of seed clearly contained inferior seed, but higher density seed lots tended to have better germination and seedling vigour than lower density ones. Keywords: seed density, seedling vigour, germination, tall fescue, endophyte
29
Kusumawardana, Aditya, Bambang Pujiasmanto i NFN Pardono. "Pengujian Mutu Benih Cabai (Capsicum annuum) Dengan Metode Uji Pemunculan Radikula [Seed Quality Test in Pepper (Capsicum annuum) Seeds Using Radicle Emergence]". Jurnal Hortikultura 29, nr 1 (9.10.2019): 9. http://dx.doi.org/10.21082/jhort.v29n1.2019.p9-16.
Pełny tekst źródłaStreszczenie:
<p>Kecepatan berkecambah yang rendah merupakan indikator kemunduran benih. Pengujian vigor dengan metode uji pemunculan akar pada benih cabai dilakukan untuk menduga pertumbuhan tanaman di lapangan. Makin tinggi nilai uji pemunculan akar maka vigor benih makin tinggi. Jika laju pemunculan radikula pada benih berjalan lambat, vigor benih tersebut dinyatakan rendah. Tujuan penelitian ini adalah membandingkan jumlah kemunculan radikula pada empat lot benih cabai pada suhu berganti 2030°C selama 168 jam. Penelitian ini menggunakan rancangan acak lengkap dengan satu faktor, yaitu lot benih berupa empat varietas cabai (Sret, Laskar, Serambi, dan Madun) dengan delapan ulangan. Perhitungan koefisien korelasi dilakukan untuk mengetahui keeratan hubungan antara nilai uji pemunculan radikula dengan tolok ukur pengujian yang lain. Hasil penelitian menunjukkan bahwa kemunculan radikula tertinggi terjadi pada 120 jam. Jumlah pemunculan radikula berkorelasi positif dengan daya berkecambah (r=0,907), indeks vigor (r=0,864), kecepatan tumbuh (r=0,727), dan daya tumbuh (r=0,935). Dari penelitian ini diperoleh kesimpulan bahwa uji vigor pemunculan radikula benih cabai yang dilakukan pada suhu 2030°C selama 120 jam (5 hari) dapat digunakan untuk menilai mutu benih cabai.</p><p><strong>Keywords</strong></p><p>Benih cabai; Daya tumbuh; Mutu benih; Pemunculan radikula</p><p><strong>Abstract</strong></p><p>Low germination is an indicator of seed deterioration. Vigour testing using radicle emergence on pepper seeds was done to predict plant growth in field. The higher radicle emergence found, the higher the seed vigour occurred. If the rate of radicle was slow, the seed vigour was also low. The objective of this study was to compare the number of radicles emergence on four pepper seed lots at 2030°C for 168 hours. This study used a completely randomized design with one factor, seed lot four variety of pepper (Sret, Laskar, Serambi, and Madun) with eight replication. Calculation of coefficients correlation was done to calculate the relationship between radicle emergence and on other testing. The highest of radicles emergence occurred at 120 hours. The number of radicle emergence had positive correlation with germination (r = 0.907), vigour index (r = 0.864), speed of growth (r = 0.727), and field emergence (r = 0.935). From this research, it can be concluded that the vigour test in pepper seeds using radicle emergence was performed at 2030°C for 120 hours (5 days).</p>
30
Rokib, A., i MS Monjil. "Fungicidal seed treatment on germination and seedling vigour of lentil var. BINA Masur-3". Asian Journal of Medical and Biological Research 3, nr 1 (14.04.2017): 140–44. http://dx.doi.org/10.3329/ajmbr.v3i1.32050.
Pełny tekst źródłaStreszczenie:
Effectiveness of six fungicides viz., Provax-200 (Carboxin+Thiram), Bavistin DF (Carbendazim), Dithane M-45 (Mancozeb), Secure (Mancozeb+Fenamidone), Antracol (propineb) and Daconil (Chlorothalonil) were evaluated to improve seed germination and seedling vigour of lentil variety BINA Masur-3. The experiment was conducted in the Green House of Seed Pathology Centre, Bangladesh Agricultural University, Mymensingh. Positive effect of seed treatment with fungicides on seed germination and seedling vigour of lentil was recorded. At 20 DAS, increased seed germination over control was observed in treated seeds with Deconil (10.40%) and Antracol (10.00%) followed by Dithane M-45 (7.20%). Seeds treated with Deconil and Dithane M-45 produced seedlings with higher shoot length, root length and seedling vigour. At 20 DAS, higher percent increased vigour index over control was found in Dithane M-45 (24.64%) and Deconil (22.44%), respectively.Asian J. Med. Biol. Res. March 2017, 3(1): 140-144
31
Thakur, Anubhav, KC Dhiman i Rajesh Kanwar. "Effects of Seed Treatment on Seed Quality and Storability In Wheat (Triticum Aestivum L.) In North Western Himalayas". Bangladesh Journal of Botany 51, nr 1 (31.03.2022): 113–21. http://dx.doi.org/10.3329/bjb.v51i1.58827.
Pełny tekst źródłaStreszczenie:
Storage experiment was conducted to study effects of polymer, fungicides and insecticide on seed quality parameters and storability in wheat. Experimental material consisted of carry over wheat seeds (variety HPW-155) of rabi 2017 - 18. Different parameters namely, germination, seedling length, dry weight, vigour index - I, vigour - II, speed of germination, field emergence, 100-seed weight for 12 months of storage were recorded bimonthly. All parameters were found to decrease with the advancement in storage period. Results showed that seeds treated with polymer + vitavax 200 @ 2 g/kg of seed recorded higher germination percentage (95.00), seedling length (17.58 cm), seedling dry weight (0.0138 g), vigour index - I (1670) and vigour - II (1.311), speed of germination (19.98), 100-seed weight (5.54 g). Field emergence (87.33) were at par with vitavax 200 @ 2 g/kg of seed over untreated control. For the purpose of maintaing seed quality and enhancing storability, seed of wheat can either be treated with polymer @ 3 ml/kg of seed + vitavax 200 @ 2 g/kg of seed or vitavax 200 @ 2 g/kg of seed. Bangladesh J. Bot. 51(1): 113-121, 2022 (March)
32
SURENDER SINGH, DIWAN SINGH i V.U.M. RAO. "Response of chickpea seed germination to varying temperatures". Journal of Agrometeorology 11, nr 1 (1.06.2009): 64–66. http://dx.doi.org/10.54386/jam.v11i1.1225.
Pełny tekst źródłaStreszczenie:
Fifteen cultivars of chickpea were evaluated by having vigour test viz. percent germination, shoot length, root length, dry matter per seedling, vigour index and growth rate index. These were determined in the laboratory of National Seed Project centered at Haryana Agricultural University, Hisar during 2005. The germination was below 90 per cent at 350C temperature in HC-3, HK-1, HC-1, H-208, Gora Hisari and H Gaurav cultivars. At 250C temperature, germination rate index was above 13.0 in most of the cultivars. Seed vigor (SG1) was maximum around 250C. It is concluded that temperature had a strong influence on the germination and seed vigour of different chickpea cultivars.
33
Qi, Xing Wei, Wei Kai Li, Wei Li i He Li. "Study on the Vigour Testing of Soybean Seed Based on Near Infrared Spectroscopy Technology". Applied Mechanics and Materials 58-60 (czerwiec 2011): 458–62. http://dx.doi.org/10.4028/www.scientific.net/amm.58-60.458.
Pełny tekst źródłaStreszczenie:
In the experiment, a new non-destructive method for discriminating three vigour of soybean seeds was developed by near infrared spectroscopy (NIRS) combined with principal component and Mahalanobis distance model. The result show that NORMALIZE was the best pretreatment method of NORMALIZE, MSC, First Derivative and Second Derivative, the ideal spectral acquisition range of Soybean seed was 4000cm-1～6900cm-1, the cumulative contribution rate of the front four principal components reached 99.82%, it established the best model. The model could successfully complete the calibration samples and identify the prediction sample. This study proved that the use of near infrared spectroscopy combined with pattern recognition methods to rapid and nondestructive determination of seed vigor was indeed feasible. This study will offer a new method of testing soybean seed vigour with quick, non-destructive characters.
34
van de Venter, Albie. "What Is Seed Vigour?" Journal of New Seeds 2, nr 3 (3.01.2001): 67–72. http://dx.doi.org/10.1300/j153v02n03_06.
Pełny tekst źródła
35
BALL, B., D. MEHARRY, T. L. BOTWRIGHT ACUÑA, D. L. SHARMA, M. HAMZA i L. J. WADE. "INCREASES IN SEED DENSITY CAN IMPROVE PLANT STAND AND INCREASE SEEDLING VIGOUR FROM SMALL SEEDS OF WHEAT (TRITICUM AESTIVUM)". Experimental Agriculture 47, nr 3 (4.04.2011): 445–57. http://dx.doi.org/10.1017/s0014479710001006.
Pełny tekst źródłaStreszczenie:
SUMMARYEarly vigour in wheat (Triticum aestivum) is an important physiological trait to improve water-use efficiency and grain yield, especially on light soils in Mediterranean-type climates. Potential interactions for plant stand and seedling vigour between seed density and various seed quality treatments were examined for wheat grown in two experiments, conducted under controlled and field environments in Western Australia. Seed lots were graded into seed size classes and seed density fractions using saturated solutions of ammonium sulphate or sodium polytungstate. Dense seed improved plant stands or produced seedlings with greater early seedling vigour than their low-density counterparts in all three field environments. Artificial ageing reduced germination and emergence in the controlled environment. When grown in the field at Merredin, Western Australia, on the sandy soil, plant development was delayed with aged seed, and total leaf area and dry weight of plants were reduced. Fungicide application diminished total plant dry weight in sandy soils, but had a much larger detrimental effect when applied to aged and low-density seeds than normal seeds, retarding development, total leaf area and total plant dry weight. Our results indicate that an increase in seed density, particularly in small seed, can potentially improve plant stand and seedling vigour independently of seed size, and may be especially important for wheat grown on sandy soils of poor fertility and low water-holding capacity. The results also suggest consistency in seedling vigour may benefit from combined screening against small seed size and low seed density, which may also reduce the likelihood of adverse reactions to seed-applied fungicides. More attention should be paid to seed density as a valuable trait for improved reliability in plant stand and seedling vigour.
36
Chaudhari, Mani, B. N. Satodiya i H. L. Chaudhary. "To Study the Impact of Seed Storage Period and Growth Regulators on Physiological Parameters of Jackfruit (Artocarpus heterophyllus Lam.) Seedling". International Journal of Plant & Soil Science 36, nr 4 (24.02.2024): 1–6. http://dx.doi.org/10.9734/ijpss/2024/v36i44445.
Pełny tekst źródłaStreszczenie:
An experiment entitled “To study the impact of seed storage period and growth regulators on physiological parameters of Jackfruit (Artocarpus heterophyllus Lam.) seedling” was conducted in a green shade net house at Horticultural Research Farm, Department of Horticulture, B. A. College of Agriculture, Anand Agricultural University, Anand during the year kharif-2019. The treatment comprised three levels of seed storage period (S) viz., S1- 0 days after extraction of seed, S2- 5 days after extraction of seed and S3- 10 days after extraction of seed and five seed soaking treatments of growth regulators GA3 for 24 hrs (G) viz., G1- GA3 ‘at’ 100 mg 1-1, G2- GA3 ‘at’ 150 mg 1-1, G3- NAA ‘at’ 25 mg 1-1, G4- NAA ‘at’ 50 mg 1-1 and G5- Control. The experiment was conducted in Completely Randomized Design (Factorial) with 15 treatment combinations and repeated thrice. Sowing of fresh extracted seeds of jackfruit recorded at 90 DAS maximum leaf area (43.38 cm2), root: shoot ratio (0.22), vigour index-I (41.60) and vigour index-II (3.17). While, Soaking seed in GA3 ‘at’ 100 mg l-1 for 24 hrs recorded at 90 DAS maximum leaf area (52.34 cm2), root: shoot ratio (0.22), vigour index-I (38.08) and vigour index-II (3.13). Treatment combination sowing of fresh extracted seeds and soaking seeds in GA3 ‘at’ 100 mg l-1 for 24 hrs recorded at 90 DAS maximum leaf area (59.87 cm2) vigour index-I (56.03) and vigour index-II (5.37).
37
Makinde, Aderemi I., Kehinde O. Oyekale i David S. Daramola. "Impact of Seed Size on the Seedling Vigour, Dry Matter Yield and Oil Content of Jatropha (Jatropha curcas L.)". Journal of Agricultural Science 12, nr 3 (15.02.2020): 197. http://dx.doi.org/10.5539/jas.v12n3p197.
Pełny tekst źródłaStreszczenie:
Seed size is a trait of the plant that affects seed germination and seedling survival. This study aims to assess the growth response of J. curcas to different seed sizes. A pot experiment was conducted to evaluate the effects of J. curcas seed sizes on the seedling vigour and seed component. The seeds were fractioned into three sizes visually into: large, medium and small and by 1000 seeds weight (SW). Seedling vigour was assessed by: germination % (G%), seedling length cm (SL), seedling vigour index, SVI, seedling growth rate, SGR, and speed of germination, SOG as well as proportion of cake, shell and oil content (OC) expressed as% of the seed. Results obtained shows that G% and the SOG were not affected by seed sizes but by other factors within the seed. However, seedling vigour expressed as SL, SVI and SGR increased significantly (P ≤ 0.05) with increase in seed sizes. Proportion of cake, shell and oil component of J. curcas seeds increased with increasing seed sizes while 60% of the seed is made up of the cake from where the oil is extracted. Dry matter yield, DMY significantly (P ≤ 0.05) increased with increase in seed size from 6.41 g/plant in large seeds to 2.61 g/plant in small seeds. There is positive and strong significant correlation between, SW and DMY (r = 0.91**), yield increase (r = 0.82**), OC (r = 0.85**), % cake (r = 0.94**). Findings revealed that larger seed had higher potential of producing vigorous plants with eventual high crop yield and higher OC.
38
Milosevic, Mirjana, Milka Vujakovic i Djura Karagic. "Vigour tests as indicators of seed viability". Genetika 42, nr 1 (2010): 103–18. http://dx.doi.org/10.2298/gensr1001103m.
Pełny tekst źródłaStreszczenie:
Seed marks the beginning of each plant production and therefore ensuring its quality is the priority of modern seed science and a prerequisite for obtaining high yields of all plant species. Determination of seed quality and its viability indicates what seed lots can be placed onto the market, and for that reason it is very important to have reliable methods and tests to be used for seed quality and seed vigour testing. The term vigour of viability is used to describe the physiological characteristics of seeds that control its ability to germinate rapidly in the soil and to tolerate various, mostly negative environmental factors. MCDONALD grouped vigour tests into three groups: Physical tests - determine seed characteristics such as size and mass. These tests are inexpensive, quick, can be applied to large number of samples, and are positively correlated with seed vigour. The main feature of seed development is accumulation of nutritive materials, which is also in direct correlation with vigour, i.e. with size and mass of seed; Physiological tests - using germination and growth parameters. There are two types of these tests. First type, when germination is done under favourable conditions (standard laboratory germination, and test of growth intensity). Second type, when seed is exposed to unfavourable environmental conditions (cold test, accelerated aging test, and Hiltner test); Biochemical tests - are considered as indirect methods for estimation of seed value. These are Tetrazolijum test, conductometric measurements, enzyme activity and respiration.
39
Andrade, Gisiane Camargo de, Cileide Maria Medeiros Coelho i Matheus Santin Padilha. "Seed reserves reduction rate and reserves mobilization to the seedling explain the vigour of maize seeds". Journal of Seed Science 41, nr 4 (październik 2019): 488–97. http://dx.doi.org/10.1590/2317-1545v41n4227354.
Pełny tekst źródłaStreszczenie:
Abstract: Understanding how the seed reserve dynamics occurs during germination and seedling formation is determinant for advancements on seed technology. The aims of this study were: to verify which accelerated ageing temperature is the most effective to separate the vigour levels of maize seeds and to evaluate the reserves dynamics during germination and seedling formation process. Seven maize cultivars were submitted to the germination rate, accelerated ageing, thousand seed weight, total seedling length, shoot and root length, dry matter of seed and seedling, remaining dry matter in the endosperm, seed reserves reduction rate, conversion efficiency of reserves, reserves mobilization rate to the seedling and energy expenditure using the completely randomized statistical design. The reserves dynamics and seedling formation depends on the genotype and the initial seed vigour. Accelerated ageing at 45 °C for 72 hours is the most efficient combination to segregate vigour levels. Genotypes with higher seed reserve utilisation efficiency have higher vigour, producing seedlings with higher dry matter, higher total, shoot and root length, regardless of seed weight. The two rates evaluated prompt us to conclude that they explain the maize seed vigour and can be used in quality control programs to select high physiological quality cultivars.
40
Grzesiuk, Stanisław, i Ryszard Górecki. "Dependence of the legume seeds vigour on their maturity and method of harvest". Acta Societatis Botanicorum Poloniae 58, nr 3 (2014): 327–41. http://dx.doi.org/10.5586/asbp.1989.028.
Pełny tekst źródłaStreszczenie:
Several methods were used to study 'the vigour and viability of legume seeds <em>(Pisum sativum </em>L. cv. Hamil, <em>Piston arvense </em>L. cv. Mazurska and <em>Lupinus luteus </em>L. cv. Tomik) harvested at three main stages of seed repening (green, wax and full). The seeds were tested immediately after harvest (series A) and after two weeks of storage in pods (series B). It was found that: 1) the vigour of ripening legume seeds increases with maturation; 2) post-harvest storage in pods increases the degree of ripeness and. consequently. vigour; 3) seeds attain full vigour later than full viability; 4) seed leachate conductivity method gives erroneous results in assessing the vigour of immature seeds: 5) full vigour of maturing seeds of various degrees of ripeness can be determined by simultaneous application of both biological (eg. seedling growth analysis, VI) and biochemical (e.g. total dehydrogenase activity) methods.
41
Nisha, A. Bhuker, SS Jakhar i N. Singh. "Assess the effect of natural ageing and storage containers on seed quality of tomato seeds". Journal of Agriculture and Ecology 14 (5.11.2022): 131–34. http://dx.doi.org/10.58628/jae-2214-218.
Pełny tekst źródłaStreszczenie:
The present study entitled "Seed quality assessment in the naturally aged seed of tomato was conducted during rabi 2020-2021 and 2021-2022 at the Department of Seed Science and Technology, CCS Haryana Agricultural University, Hisar. The freshly stored seed was observed to be highest in seed quality parameters i.e., germination per cent, seedling length, seedling dry weight and seed vigour indices as compared to when seeds were stored in different containers during 18 months storage period. As the storage period increase, the seed quality parameter goes on decreasing. Among the containers, 18-month seeds stored in a polythene bag (> 700 gauge) recorded significantly higher seed germination (60.67%), seedling length (8.77cm), seedling dry weight (11.42 mg), vigour index -I (532) and seed vigour index-II (793) as compared to a cloth bag. Standard germination percentage was maintained up to 15 months of storage in a polythene bag. In both containers, polythene bags performed better than cloth bags throughout the storage period.
42
Górecki, Ryszard J., Dorota Mierzejewska, Jan Kaszuba, Stanisław Grzesiuk i Andrzej Rejowski. "Vigour evaluation of cocksfoot (Dactylis glomerata) seeds of different age". Acta Agrobotanica 42, nr 1-2 (2013): 23–33. http://dx.doi.org/10.5586/aa.1989.002.
Pełny tekst źródłaStreszczenie:
Cocksfoot seeds cv. Baza and Bepro, harvested in 1986, 1985, 1984, and 1983 and stored in a store-house were studied. Seed lots did not differ greatly in their viability. However, significant reduction in seed vigour due to natural ageing as measured by soil emergence, seedling growth rate, and ethanol and osmotic stress tests was noted. A conductivity test did not indicate vigour changes of ageing seeds, and its correlation with field emergence was poor. The methodical aspects of vigour evaluation of cocksfoot seeds are discussed.
43
Sutradhar, Sayandeep, Anish Choudhury i Sanjoy Kumar Bordolui. "Effects of Seed Invigoration Treatments with Bio-priming on Germination, Vigour and Seedling Growth in Black Gram (Vigna mungo L.)". International Journal of Plant & Soil Science 35, nr 18 (24.07.2023): 740–46. http://dx.doi.org/10.9734/ijpss/2023/v35i183340.
Pełny tekst źródłaStreszczenie:
A study had been conducted in black gram to observe the effect of different seed invigoration treatments with bio-priming for seed germination, seedling growing and vigour. The variety of black gram i.e., Uttara, was selected and seed had been treated with control (T1); Seeds soaked in distilled water/ hydropriming (T2); Rhizobium leguminosarum 10% (T3); Rhizobium leguminosarum 15% (T4); Rhizobium leguminosarum 20% (T5); Rhizobium leguminosarum 25% (T6); Rhizobium leguminosarum 30% (T7) respectively. Treated seeds were grown in different glass plate and patri plate at Seed Testing Laboratory, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal, India. Seed invigoration with Rhizobium leguminosarum at 20% followed by T4 was found very effective for seed germination with vigorous seedlings. Higher seed germination percentage (82.60), shoot length (17.89 cm), root length (12.99 cm), seedling fresh weight (1.87 g), seedling dry weight (0.19 g), seedling vigour index I (2393.62) and seedling vigour index II (15.96) results were observed for the seed bioprimed with Rhizobium leguminosarum at 20%. Seed treatment with Rhizobium leguminosarum at 20% recorded better performance than rest the treatments for all characters observed. The present investigation clearly depicted that the germination, vigour and seedling growth revalidated seed lots can be improved by pre-sowing and invigoration treatments.
44
Silva, Claudia Denise da, Mariana Silva Rosa Pazeto i Roberval Daiton Vieira. "Electrical conductivity and mineral composition of the imbibition solution of bean seeds during storage". Ciência e Agrotecnologia 36, nr 2 (kwiecień 2012): 147–55. http://dx.doi.org/10.1590/s1413-70542012000200002.
Pełny tekst źródłaStreszczenie:
The electrical conductivity test has been used to evaluate seed vigour in many species, especially legumes, such as peas, beans and soybeans. The objective of this research was to evaluate the effect of temperature and storage period on the results of the electrical conductivity test and the mineral composition of the imbibition solution of bean seeds (Phaseolus vulgaris L.). Three seed lots of the cultivar IAPAR - 81 and cultivar IPR - TIZIU were stored at 10, 25 and 25-10º C (six months at 10º C and six months at 25º C) The following evaluations were made every three months for a year: seed water content, germination and vigour (accelerated ageing and electrical conductivity) and the potassium, calcium and magnesium contents of the imbibition solution. The cultivars showed similar behavior in storage. The reduction in the vigour of bean seeds stored at 10º C was verified by accelerated ageing and electrical conductivity tests. The bean seed storage at low temperature (10º C) does not influence the results of the evaluation of seed vigour by electrical conductivity test and the quantification of calcium, magnesium and potassium ions. The evaluation of vigour by the electrical conductivity test is not recommended for bean seed stored by long periods (above 9 months).
45
KUMAR, VIPESH, SHER SINGH VERMA, URMIL VERMA i AXAY KUMAR. "Seed viability and vigour in naturally aged seeds of coriander (Coriandrum sativum)". Indian Journal of Agricultural Sciences 85, nr 4 (17.04.2015): 561–65. http://dx.doi.org/10.56093/ijas.v85i4.47943.
Pełny tekst źródłaStreszczenie:
In the present investigation, three seed lots of eight varieties/genotypes, viz. DH 224, DH 226, DH 242, DH 259, DH 294, DH 296 (advance genotypes) and DH 228 (Hisar Bhoomit) and Hisar Anand (released varieties) of coriander were subjected to study the effect of natural ageing on different seed quality parameters. All the seed lots were analyzed for standard germination test (%), root length (cm), shoot length (cm), seedling dry weight (mg), seedling vigour index-I, seedling vigour index-II, accelerated ageing test (%), electrical conductivity (mS/cm/seed) of seed leachates, seed density (g/cc), dehydrogenase activity test (OD/g/mL), field emergence index and field establishment (%). Results revealed that all the varieties/genotypes showed the germination percentage above the Minimum Seed Certification Standards (60%) in Lot-A (½ year old seed) and Lot-B (1½ years old seed). Standard germination (%), seedling length (cm), seedling dry weight (mg), seedling vigour index-I &II, accelerated ageing test (%), dehydrogenase activity test (OD/g/mL), field emergence index and field establishment (%) decreased significantly and progressively as the ageing period increased. The electrical conductivity was negatively and significantly correlated with all seed viability and vigour parameters. Results also revealed that viability and vigour of seeds declined with faster rate in Lot-C (2½ years old seed). Among all the varieties/genotypes, genotypes DH 224 and DH 228 were found most promising for various parameters of viability and vigour.
46
Umarani, R., M. Bhaskaran, C. Vanitha i M. Tilak. "Fingerprinting of volatile organic compounds for quick assessment of vigour status of seeds". Seed Science Research 30, nr 2 (czerwiec 2020): 112–21. http://dx.doi.org/10.1017/s0960258520000252.
Pełny tekst źródłaStreszczenie:
AbstractSeed is a fertilized mature ovule, which possesses an embryonic plant. When the dry, mature seeds are subjected to imbibition, they release a wide range of organic substances, which include low molecular weight carbonyl compounds (gases and volatiles) and water-soluble organic substances (enzymes and polysaccharides). The volatile organic compounds (VOCs) are molecules of low molecular weight (300 g mol−1) and high vapour pressure (0.01 kPa at 20°C) and include diverse chemical compounds. The nature and emission kinetics of volatiles produced from seeds vary, depending on the moisture content of the seeds. Orthodox seeds stored at ‘low seed moisture content’ undergo seed deterioration, predominantly due to lipid peroxidation, initiated by autoxidation or enzymatic oxidation of unsaturated or polyunsaturated fatty acids. This peroxidation leads to emission of volatile compounds. The quantity of VOCs emitted is positively correlated with the advancement of seed deterioration. With respect to the seed germination process, exposure of seeds to ‘high moisture conditions’ leads to increased respiration, triggers glycolysis and mobilization of storage reserves, resulting in the emission of volatile metabolic products. The quantity of VOCs emitted on commencement of metabolic activity in germinating seeds depends on (1) vigour status and (2) amount of storage reserves. Since it has been established that there is a significant difference between high and low vigour seeds with respect to quantity and profile of VOCs emitted, there is great potential for utilizing the VOC profile to obtain a quick and reproducible test of vigour status of crop seeds. In order to harness the VOC profile for quick assessment of vigour status of seeds, research has to be taken up to develop standard protocols for fingerprinting of VOCs for the purpose of seed vigour assessment and to fix the standard volatile biomarker(s) specific to crop and vigour status of seeds.
47
Ali, MR, MM Rahman, M. Asaduzzaman, MAH Khan i J. Rahman. "Moisture level and storage container effects on seed quality of soybean genotypes under ambient condition". Bangladesh Journal of Agricultural Research 44, nr 4 (1.03.2020): 631–40. http://dx.doi.org/10.3329/bjar.v44i4.45698.
Pełny tekst źródłaStreszczenie:
The experiment was conducted at the Seed Laboratory, Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Jamalpur in 2013 to study the effect of seed moisture content and storage containers on seed quality of soybean genotypes. Three genotypes of soybean (AGS 191, ASET 93 and Shohag), four initial seed moisture content (6, 8, 10 and 12%) and two types of storage containers (polythene bag and glass jar) were included in the experimental treatment. Seeds of soybean genotypes was stored at ambient condition were temperature ranged from 15.97 to 29.37 0C, relative humidity ranged from 75.21 to 86.23% and rainfall ranged from 0.00 to 425mm during the whole storage period. Seed moisture content (%), germination (%) and vigour index were recorded at 50, 100, 150 and 200 days after storage (DAS). Result showed that final seed moisture content increased with the increase of initial seed moisture content. Genotype AGS 191 showed the highest germination (%) and vigour index. Seeds stored in polythene bag or glass jar showed similar performance for germination (%) and vigour index. Highest seed moisture content significantly reduced the germination and vigour index errespective of containers. The results indicate that soybean seed can be stored safely for at least 200 days maintaining >80% germination and high vigour when stored in polythene bag or glass jar with 6-8% initial moisture content at ambient room temperature and relative humidity.
Bangladesh J. Agril. Res. 44(4): 631-640, December 2019
48
Yanping, Yin, Gao Rongqi, Sun Qingquan i Li Shengfu. "Effects of storage temperature and container type on the vigour of Welsh onion seeds with low moisture content". Australian Journal of Experimental Agriculture 39, nr 8 (1999): 1025. http://dx.doi.org/10.1071/ea99074.
Pełny tekst źródłaStreszczenie:
Summary. The vigour of Welsh onion (Allium fistulosum L.) seeds with low moisture content was determined after exposure to different storage temperatures and container types. As the storage period was prolonged, the effects of storage temperature and container type on seed vigour became more pronounced. Storage temperature had a greater effect on seed vigour than container types, and the effect of the latter was subject to the storage temperature. When the seeds were stored in the same type of container, several indices of the seed vigour declined as the storage temperature increased. A highly significant positive correlation was evident between dehydrogenase activity and the percentage germination of the seed. Improving storage conditions could prolong seed longevity. If the seeds, in which the moisture content has been reduced to less than 6%, are stored airtight, the percentage germination will be about 85% after storage for 2 years at room temperature or after 3-year storage at 6°C. If the seeds are stored at –6°C, the percentage germination will range from 86 to 91% after 3-year storage, regardless of the storage container types in this study. These data are very important for the seed storage and germplasm conservation of Welsh onion.
49
Vijayalakshmi, V., S. Sathish i R. Umarani. "Effect of Xanthan gum seed coating on seed germination and seedling vigour of finger millet (Eleusine coracana L.)". Environment Conservation Journal 25, nr 1 (7.02.2024): 206–10. http://dx.doi.org/10.36953/ecj.24342669.
Pełny tekst źródłaStreszczenie:
Six Hydrophilic polymers Xanthan Gum, Iota Carrageenan, Kappa Carrageenan, Agar Agar, Food grade Agar and Gellan Gum were studied for polymerization potential and water holding capacities. Among the six polymers, Xanthan gum and Iota Carageenan recorded the maximum values for water holding capacities of 38.27 ml/g and 34.17 ml/g and were forwarded for the Seed coating experiment. Coating experiments consist of twodosages of polymer powders (10g, and 20g /kg) and two concentrations of sticking agent (water 5ml and 10 ml). Coated seeds exposed to seed germination studies against untreated seeds. Results revealed that Finger millet seeds coated with 20 g Xanthan gum + 10 ml water as sticker recorded the maximum values for seed germination (87%), seedling length (26.23cm), dry matter production (12.47mg 10 seedlings-1)and Vigour Index I (2282) and II (1084).The % increase over the control was 7 for seed germination, 56 for seedling length (cm), 21 for dry matter production (mg) ,69 for seedling vigour index I and 31for seedling vigour index II. From the studies it could be concluded that Finger millet seeds coated with the Xanthangum @20 g can be recommended as pre sowing seed treatment for improving the Seed Germination and seedling vigour.
50
Yalamalle, V. R., D. M. Ithape, A. Kumar, K. Bhagat, S. Ghosh i M. Singh. "Seed treatment with 5-azacytidine reduces ageing-induced damage in onion seeds". Seed Science and Technology 48, nr 3 (31.12.2020): 407–12. http://dx.doi.org/10.15258/sst.2020.48.3.09.
Pełny tekst źródłaStreszczenie:
The effect of treating aged onion seeds with 5-azacytidine (5-aza) on germination and vigour was evaluated. Seeds of two onion varieties, 'Bhima Raj' (BRJ) and 'Bhima Red' (BRD) were treated with 0, 10, 25 or 50 μg mL–1 5-azacytidine (a DNA demethylating agent). In comparison with the control treatment (0 μg mL–1 5-azacytidine), treatment with 5-azacytidine enhanced seed germination, seedling length, seedling dry weight and seed vigour indices. 5-azacytidine treatment also increased the activity of superoxide dismutase (SOD) and total antioxidant capacity (TAC). Seed treatment with 5-azacytidine has the potential to enhance the viability and vigour of aged onion seeds. This study provides phenotypic and biochemical data for further exploring the role of DNA methylation in understanding the process of seed ageing.