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Bibliografias temáticas / Germination

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Literatura científica selecionada sobre o tema "Germination"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 29 de julho de 2024

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Artigos de revistas sobre o assunto "Germination"

1

Pee, K. C., C. E. Johnson, E. W. Bush e E. A. Drummond. "SUB-OPTIMUM TEMPERATURE GERMINATION OF 15 WATERMELON CULTIVARS". HortScience 25, n.º 8 (agosto de 1990): 862a—862. http://dx.doi.org/10.21273/hortsci.25.8.862a.

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Seed of 15 watermelon cultivars were evaluated for germinating ability at sub-optimum temperatures. Seeds of each cultivar were exposed to 12.8, 15.6, 18.3, 21.1, and 30.0°C for 8 days in a germinator in accordance to standard seed testing rules. Radical emergence was evaluated on day 5 and day 8. None of the cultivars germinated at 12.8C after 8 days exposure. At 15.6°C, 'Red-N-Sweet' and `Blackstone' had germinations of 54 and 40 percent respectively on day 5, and both increased to over 80 percent on day 8. At 18.3°C `Red-N-Sweet' and `Blackstone' exhibited at least 90 percent germination after 5 days while the other 14 cultivars ranged from 2.5 to 86 percent. At 21.1°C all cultivars except `Black Diamond' and `Allsweet' had germinations of 80 percent or higher on day 5. Germination increased to 90 percent or above by day 8 except for `Black Diamond' at 83 percent. There were no significant differences among cultivars at the 30°C optimum germinating temperature with cultivars having 89.5 percent or higher germination.

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2

Vrzalová, Jana, e Pavel Knot. "The effect of seed age and treatment by Proradix method on germinability and initial growth of selected meadow grass (Poa pratensis) varieties". Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 59, n.º 5 (2011): 309–14. http://dx.doi.org/10.11118/actaun201159050309.

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The goal of the study conducted in 2008 and 2010 at the Research Forage Production Station in Vatín was to investigate the influence of seed age and seed treatment by Proradix method on the germination dynamics, total germinating capacity and initial growth rate of selected meadow grass varieties. The testing was carried out in controlled conditions on the germinator. Our results indicate that the age of seed significantly affects both the germination dynamics and the total germinating capacity. On day 7 after the establishment of the trial, a significantly higher germinating capacity was observed in the 4-year old seed (33.3%) as compared with the 2-year old seed (17.4%). Nevertheless, from day 13, higher germination values were recorded in the younger seed and its total achieved germinating capacity was significantly higher too (+7.2%). Interesting was a finding that the older seed of most varieties showed a more readily oncoming germination, which may play a quite important role in some cases namely in meadow grass, which is known by slow initial growth. The older seed exhibited significantly lower values of both above-ground biomass and the biomass of roots. The Proradix method appeared as efficient in boosting the total germinating capacity. It significantly increased germination rate as well as total germinating capacity. At the same time, a positive effect was observed of treatment by this method on the length of both shoot and root parts; the difference was statistically insignificant though.

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3

Aime, M. C., e O. K. Miller Jr. "Delayed germination of basidiospores in temperate species of Crepidotus (Fr.) Staude". Canadian Journal of Botany 80, n.º 3 (1 de março de 2002): 280–87. http://dx.doi.org/10.1139/b02-009.

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Delayed basidiospore germination (endogenous dormancy) for a number of species of Crepidotus (Agaricales: Crepidotaceae) is reported for the first time. Ninety percent of recovered single spore isolates germinated between 18 and 36 weeks after collection; average germination was 25 weeks after collection. The period in which 90% of germinations occurred was between 17 February and 19 April, with 50% of recovered isolates germinating in March. Many abiotic factors were experimentally manipulated in an effort to reduce or alter the necessary incubation period without effect. The latent period was consistent for a given collection, with the majority of recovered isolates from fall-fruiting collections germinating during early spring, regardless of whether spores were plated immediately after harvesting or stored for one to several months prior to plating. The identity of the cultures derived from delayed germination was confirmed by DNA sequencing.Key words: basidiospore, dormancy, single spore isolates, Crepidotaceae, large subunit ribosomal DNA sequence data, phylogeny.

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4

Ribeiro-Oliveira, J. P., M. A. Ranal e M. A. Boselli. "Water Dynamics on Germinating Diaspores: Physiological Perspectives from Biophysical Measurements". Plant Phenomics 2020 (6 de dezembro de 2020): 1–16. http://dx.doi.org/10.34133/2020/5196176.

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We demonstrated that classical biophysical measurements of water dynamics on germinating diaspores (seeds and other dispersal units) can improve the understanding of the germination process in a simpler, safer, and newer way. This was done using diaspores of cultivated species as a biological model. To calculate the water dynamics measurements (weighted mass, initial diffusion coefficient, velocity, and acceleration), we used the mass of diaspores recorded over germination time. Weighted mass of germinating diaspores has a similar pattern, independent of the physiological quality, species, or genetic improvement degree. However, the initial diffusion coefficient (related to imbibition per se), velocity, and acceleration (related to the whole germination metabolism) are influenced by species characters, highlighting the degree of genetic improvement and physiological quality. Changes in the inflection of velocity curves demonstrated each phase of germination sensu stricto. There is no pattern related to the number of these phases, which could range between three and six. Regression models can demonstrate initial velocity and velocity increments for each phase, giving an idea of the management of germinative metabolism. Our finds demonstrated that germination is a polyphasic process with a species-specific pattern but still set by the degree of genetic improvement and (or) physiological quality of diaspores. Among the biophysical measurements, velocity has the greatest potential to define the germination metabolism.

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Cruz, Oscar, Juan García-Duro, Mercedes Casal e Otilia Reyes. "Can the mother plant age of Acacia melanoxylon (Leguminosae) modulate the germinative response to fire?" Australian Journal of Botany 65, n.º 7 (2017): 593. http://dx.doi.org/10.1071/bt17083.

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Acacia melanoxylon R.Br. (Leguminosae) is one of the most widely distributed tree species in the world. It has significant commercial use but can be a danger to natural ecosystems as an invader species. For these reasons it is necessary to have a deep knowledge about its germinative response to fire and the role the mother plant age plays in that response. In this work we assessed the effects of the interaction of the mother plant age with the main fire agents (smoke, charcoal, ash and heat) on the germinative response of A. melanoxylon. To reach this aim, germination tests were conducted with seeds from young, intermediate and mature mother plants, with 20 treatments each applied. Results show that fire can act as a great stimulator of the germination of A. melanoxylon but it can also strongly inhibit it. The mother plant age does not modify the final germination values, but it influences the time in which the first germinations occur after fire. This trait can be more important than the final germination percentage when looking at the success of post-fire regeneration. These results have important implications for A. melanoxylon management, for both species control and ecological restoration purposes.

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Zhang, Heng, Zhao Tang Xu e Kun He. "Effects of Disused Battery on Contents of Protein and Nucleic Acid during the Germination of Wheat Seeds". Advanced Materials Research 955-959 (junho de 2014): 213–16. http://dx.doi.org/10.4028/www.scientific.net/amr.955-959.213.

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The aim was to study the effect of extract of disused battery on wheat germination. The germination characteristics such as germination rate, germinating, germination index, vigor index, and content changes of protein and nucleic acid in wheat grain were determined by germination bed method. The results showed that the extract concentration of disused battery affected wheat germination. With the increase of extract concentration of disused battery, the germination rate, germinating, germination index, vigor index and content of nucleic acid gradually dropped, only protein content added.

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7

Dantas, Bárbara França, Luciana de Sá Ribeiro e Carlos Alberto Aragão. "Physiological response of cowpea seeds to salinity stress". Revista Brasileira de Sementes 27, n.º 1 (junho de 2005): 144–48. http://dx.doi.org/10.1590/s0101-31222005000100018.

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This work aimed to evoluate physiological response of cowpea (Vigna unguiculata L. Walp) seeds submitted to salt stress. Seeds of cultivars 'Epace-10'; 'Canapu' and 'Pitiúba' of cowpea, were submitted to germination test in germinator at 25(0)C, in "germitest" papers imbibed in distilled water or in 0, 10, 50, 100 and 200mol m-3 NaCl solutions. At the first and second counting of the germination test, normal seedlings were accounted, weighted and dried, obtaining data for vigor, total germination, fresh matter weight and dry matter weight. The seedlings hypocotyls, root and total length were measured total proteins content in cotyledons were obtained from germinating seeds. The presence of salt at concentrations higher than 50mol m-3 NaCl affect the germination, seedlings growth and cotyledons total protein synthesis of all cowpea cultivars. The seeds of cultivar pitiúba were is more tolerant to salinity, than the cultivars Canapu and Epace-10.

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8

Moreno-Pizani, María Alejandra, Asdrubal Jesus Farias-Ramirez, Hugo Thaner dos Santos, Ana Dionisia da Luz Coelho Novembre, Lorena Isabel Guevara-Orozco, Franklin Paredes-Trejo, Fábio Ricardo Marin, Nildo da Silva Dias e Patricia Angélica Alves Marques. "Qualitative and Quantitative Evaluation Protocol of Baccharis Seed Germination". Journal of Agricultural Science 11, n.º 3 (15 de fevereiro de 2019): 421. http://dx.doi.org/10.5539/jas.v11n3p421.

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Baccharis trimera (Less.) DC (E1) and Baccharis crispa Spreng. (E2) possess potential antimicrobial and anti-inflammatory properties. Qualitative and quantitative information on seed germination on these species is scarce. The objective of this investigation was to establish a protocol for evaluating seed germination of E1 and E2 and to analice the scoring and curve fitting by the Germinator package, for different periods of germination were between 0.93 and 0.99. Both species showed differences in germinability and mean germination time, 27 days for E1 and 20 days for E2. The germination dispersion showed that E1 germination was homogeneous, with differences in growth pattern, whereas the results on germination of E2. The mean speed of germination determined with the experimental data was close to the values obtained by the Germinator package, with a maximum germination of more than 34%, proving that the software was efficient for evaluating germination.

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9

Teodoro, M. S., M. C. S. Alves, M. N. Lacerda e L. M. S. Araújo. "Influência do NaClO na germinação de sementes de alface em Parnaíba-PI". Revista Verde de Agroecologia e Desenvolvimento Sustentável 10, n.º 4 (16 de outubro de 2015): 33. http://dx.doi.org/10.18378/rvads.v10i4.3405.

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<p>O presente trabalho foi desenvolvido em condições de casa de vegetação situada em Parnaíba-PI, município onde predominam altas temperaturas. Objetivou-se avaliar a germinação de diferentes lotes de sementes de alface antes e após a embebição em solução de hipoclorito de sódio (NaCIO). O delineamento experimental foi em blocos casualisados, com os tratamentos dispostos em arranjo fatorial 2 x 7 (duas variáveis como pré-germinativos: com imersão em NaClO e sem imersão em NaClO, e sete cultivares de alface), com quatro repetições. As variáveis analisadas foram: Primeira contagem do teste de germinação (PCG), Teste de germinação (TG) e Índice de velocidade de germinação (IVG). Analisando-se os dados obtidos, verificou-se que independente da presença ou ausência do tratamento pré-germinativo, a cultivar T6 foi a que apresentou os melhores resultados para as variáveis analisadas. Exceto T2, todas as outras cultivares que receberam tratamento com hipoclorito de sódio (NaClO) obtiveram resultados expressivos, em comparação com as que não receberam esse tratamento, entretanto, a germinação de todos os lotes foi inferior ao estabelecido para comercialização de sementes de alface, com recomendações acima de 80%. </p><p align="center"><strong><em>Influence of NaClO on lettuce seed germination in Parnaíba-PI</em></strong></p><p><strong>Abstract</strong><strong>: </strong>The present study aimed to evaluate, under conditions of a greenhouse located in Parnaiba, PI, where high temperatures and after soaking in solution of sodium hypochlorite (NaCIO), the germination of seeds of seven cultivars of lettuce. The experimental design was of randomized blocks, with treatments arranged in factorial arrangement 2 x 7 (two variables as pré-germinativos: with NaClO and immersion without immersion in NaClO, and seven cultivars of lettuce), with four replicates. The seeds were subjected to the following determinations: First germination test score (PCG), germination test (TG) and germination speed Index (IVG). Analyzing the data obtained, it was found that regardless of the presence or absence of treatment pre-germinative, cultivating T6 was presented the best results for the variables analyzed. Except for T2, all other cultivars that received treatment with sodium hypochlorite (NaClO) achieved significant results, compared to those who did not receive this treatment, however, the germination of all batches was lower than that established for commercialization of seeds of lettuce, with recommendations above 80.</p>

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10

Liu, Mengzhou, Ning Qiao, Bing Zhang, Fengying Liu, Yuan Miao, Ji Chen, Yanfeng Sun, Peng Wang e Dong Wang. "Differential responses of the seed germination of three functional groups to low temperature and darkness in a typical steppe, Northern China". PeerJ 10 (1 de dezembro de 2022): e14485. http://dx.doi.org/10.7717/peerj.14485.

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Seed germination is a key stage in the life history of plants, which has a crucial effect on plant community structure. Climate change has substantially altered the surface soil temperature and light availability, which can affect seed germination. However, whether the seed germination of different functional groups is affected by the interactions of light and temperature remains unclear. Under laboratory conditions, we examined the effects of low temperature and darkness, as well as their interaction, on the seed germination of 16 species belonging to three plant functional groups (annual and biennials, perennial grasses, and perennial forbs) in a typical steppe, Northern China. We found that low temperature had a significant negative effect on seed germination of all species. Low temperature significantly decreased the final germination percentage and germinative force of the three plant functional groups, and the germination duration of perennial grasses. Darkness significantly decreased the germinative force of perennial forbs and total seeds, and the germination duration of perennial grasses. The interactive effects of light and temperature on the seed final germination percentage and germinative force of perennial grass indicated that darkness strengthened the inhibitory effect of low temperature on the seed germination of the grass functional group. Our study indicate that the seed germination of different plant functional groups varied greatly in response to changing environmental conditions. Our results suggest that future climate change could alter the regeneration and species composition of plant communities through changing seed germination.

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Teses / dissertações sobre o assunto "Germination"

1

Tranbarger, Timothy John. "Isolation and regulation of genes expressed during Douglas-fir germination and post-germination". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ37366.pdf.

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2

Zaman, S., S. Padmesh e H. Tawfiq. "Effect of Pre-germination Treatments on Seed Germination of Helianthemum lippii (L.) Dum.Cours". University of Arizona (Tucson, AZ), 2009. http://hdl.handle.net/10150/556666.

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Helianthemum lippii (L.) Dum. Cours. is a perennial shrubby plant 10-45 cm tall that belongs to the family Cistaceae. The effects of pretreatments on germination of Helianthemum lippii provide information regarding germination requirements of this species, which could be used for conservation studies. Five different pretreatment were applied to enhance seed germination. Scarification followed by germination at 6 different constant temperatures (10, 15, 20, 25, 30 and 35°C) with continuous light or dark, Scarification followed by GA3 soaking (100, 250,500,750 and 1000 ppm), Heat and moist stratification (only intact seeds), KNO₃ and H₃BO₃ soaking (only intact seeds). The results obtained from this study indicate that germination in H. lippii was promoted by scarification. Scarification of seeds resulted in high germination while increasing germination temperature (35°C) decreased the germination of scarified seeds. Exposure to light and dark had no effect on germination. Heat stratification, cold stratification, KNO₃ and H₃BO₃ treatments were ineffective in increasing germination of H.lippii seeds. Scarification yielded maximum germination without soaking in GA₃ It increased the germination of Helianthemum lippii seeds from 1 to 99%. Increase in GA₃ concentration decreased the germination of this species. Scarification succeeded in breaking dormancy of H.lippii seeds suggesting that this species exhibits seed coat dormancy and in nature it may happen due to the abrasion of seed coat by sand particles or other biotic and abiotic factors.

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3

Omami, Elizabeth Nabwile. "Amaranthus retroflexus seed dormancy and germination responses to environmental factors and chemical stimulants /". [S.l. : s.n.], 1993. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030603.091907/index.html.

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4

Elliott, Katherine Anne. "Barley germination and associated metabolism". Thesis, Heriot-Watt University, 1996. http://hdl.handle.net/10399/713.

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5

Liu, Bing. "Germination studies in terrestrial orchids". Thesis, University of Leeds, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303461.

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6

Hampstead, Anthony. "Mathematical approaches to seed germination". Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/13979/.

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Plant seeds progress through specific stages during germination, from quiescence in the dry state through water uptake, testa rupture and finally endosperm rupture. The stages of seed germination are fairly well classified but the underlying biochemical and mechanical processes are unknown. The ability to control a seeds progression through the stages of germination has implications on farming efficiency and so the following thesis explores Arabidopsis thaliana and Lepidium sativum seeds during the germination process. A systematic approach to analysing the shape of cells within the radicle (embryonic root tissue) is developed, using confocal imaging, in order to characterise the shape of cells in the different tissues of the radicle. The cell shape approximations are not refined enough to characterise the different cell tissues. With more data, this approach would hope to find the region in which cells alter through the germination process. Change in the activity of cell wall modifying enzymes within the endosperm, that surrounds the emerging embryo, is a key part of the germination process and temporally and spatially defined high resolution transcriptomics data-sets are available to inform models. Through the course of this thesis, biochemical networks are developed, with ordinary and partial differential equation models being constructed and analysed. The models highlight elements for further investigation as well as differences between the two species considered. The mathematical models, along with data from biomechanical experiments on the endosperm, inform discussion on how the cell wall biochemistry of a cell wall alters the cell wall properties. These discussions focus on cell wall permeability, extensibility and the final cell separation event associated with germination. From the considered proteins, polygalacturonase and pectin lyase arise as the only viable candidates to cause the cell separation event with the model framework.

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7

Hayer, Kimran. "Germination of Aspergillus niger conidia". Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/14292/.

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Aspergillus niger is a black-spored filamentous fungus that forms asexual spores called conidospores (‘conidia’). Germination of conidia, leading to the formation of hyphae, is initiated by conidial swelling and mobilisation of endogenous carbon and energy stores, followed by polarisation and emergence of a hyphal germ tube. These morphological and biochemical changes which define the model of germination have been studied with the aim of understanding how conidia sense and utilise different soluble carbon sources for germination. Microscopy and flow cytometry were used to track the morphological changes and results showed that the germination of A. niger conidia was quicker and more homogenous in rich media than in minimal media. The germination of conidia was also shown to be quicker in the presence of D-glucose than D-xylose. In the absence of a carbohydrate, no visual indicators of germination were evident. Added to this, the metabolism of internal storage compounds was shown to only occur in the presence of a suitable carbon source. Specific environmental carbon sources may therefore serve as triggers of germination, i.e. to initiate the catabolism of stores such as D-trehalose and the swelling of conidia. Studies carried out using D-glucose analogues identified the structural features of sugars that trigger or support conidial germination. These studies showed that the arrangement of atoms on carbons 3 and 4, on the pyranose ring structure of D-glucose, are essential to serve as a trigger of germination. The trigger step preceeds, and is separate from, the energy generation step that supports the continued outgrowth. Transcriptomic studies found that the most significant changes were associated with the breaking of dormancy. The data also revealed that fermentative metabolism present at the early stages of spore germination is rapidly replaced by respiratory metabolism.

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Foster, S. J. "Biochemistry of Bacillus megaterium spore germination". Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384466.

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9

Araujo, Diego Kitahara. "Extratos de Ascophyllum nodosum no tratamento de sementes de milho e soja: avaliações fisiológicas e moleculares". Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11144/tde-07062016-155617/.

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A obtenção de uma lavoura com população adequada de plantas depende da utilização de diferentes práticas agronômicas, estando o sucesso condicionado ao uso de sementes de boa qualidade. No entanto, a semeadura dificilmente é realizada em condições ideais o que resulta em problemas na emergência das plantas. Grande é a procura por alternativas que melhorem a germinação e o desenvolvimento inicial dos cultivos resultando em uniformidade de emergência, garantindo o estande e culminando em produção. O tratamento de sementes com agroquímicos fitossanitários é uma solução parcial no combate de agentes fitopatológicos e pragas, mas poucas são as soluções adotadas para melhorar o desenvolvimento vegetal inicial, que pode levar a desuniformidade e falhas no estande gerando prejuízos econômicos. Os extratos de algas já demonstraram em diversos estudos sua eficiência no desenvolvimento vegetal quando aplicados em plantas. Porém poucos são os estudos voltados para os efeitos dos extratos de algas na germinação e emergência. Assim, o intuito deste trabalho foi testar o extrato comercial de Ascophyllum nodosum, e diferentes fracionamentos do mesmo, no tratamento de sementes de soja e milho. Avaliou-se o efeito de diferentes doses no desenvolvimento das plântulas e as doses de melhor resposta foram utilizadas no tratamento de sementes de soja a fim de associar as respostas obtidas à expressão gênica de 9 genes relacionados ao processo germinativo em 24 e 48h de embebição. Sementes de soja tratadas com o extrato comercial resultaram em plântulas menos desenvolvidas o que pode estar relacionado ao alto teor de sais contidos no produto. O tratamento com as demais frações favoreceu o desenvolvimento das plântulas, principalmente o desenvolvimento radicular. Sementes de milho tratadas não apresentaram desenvolvimento tão satisfatório quanto as sementes de soja tratadas. A análise da expressão gênica relativa demonstrou que o tratamento com frações do extrato comercial é capaz de regular algumas vias do metabolismo hormonal, como a isopentenil transferase e a GA20 oxidase 2, e do catabolismo de reservas, como a acil-CoA oxidase. Em condições ótimas, o tratamento de sementes de soja com frações do extrato comercial de A. nodosum favoreceu o desenvolvimento inicial das plântulas de soja, no entanto não ocasionou grandes alterações no desenvolvimento de milho. Este estudo demonstrou a possibilidade de utilização de frações do extrato de A. nodosum no favorecimento do desenvolvimento inicial de plântulas de soja. Maiores estudos são necessários quanto às respostas em campo e na atenuação de estresses para viabilizar seu uso como um bioestimulante em sementes.
To make a production field to achieve the suitable stand of plants someone depends on proper agronomic managements being the use of seeds of high quality one of the aspects to be taken into account. However, the sowing is rarely done under ideal conditions for the seeds germination, which leads to a considerable lack of uniformity of the stand. Researchers and farmers look for alternatives to improve the seeds germination as well as emergence and initial development of plants to achieve better stand uniformity, culminating in higher productivity. The seed treatment with fungicides and pesticides is a partial solution that control diseases and pests related to the seeds. However, very little attention is given to solutions to improve the initial development of plants that can result in poor stand and consequently lower economic yields. The A. nodosum extracts have shown through several studies their effectiveness in improving the plant development. However, those studies are not directed to the seeds germination and emergence of seedlings. Thus, this study was done to assess the A. nodosum extracts in different fractions on maize and soybean seeds treatment. Firstly, it was assessed the effect of different doses of A. nodosum extracts on the development of seedlings. The doses that showed better results were used for the soybean seed treatment aiming to associate the responses obtained to the expression of nine genes related to the germination process, at 24 and 48 hours of water uptake. Soybean seeds treated with the commercial extract of A. nodosum originated less developed seedlings. This effect can be due to the high content of salts present in the product. Treatments with the fractions of the product led to a better development of seedlings, mainly the radicular development. Maize seeds did not have the same performance as the soybean seeds. The relative gene expression analysis demonstrated that the treatment with fractions of commercial extract of A. nodosum is able to regulate some pathways of hormonal metabolism through enzymes as isopentenyl transferase and GA20 oxidase 2, and the storage catabolism, as acyl-CoA oxidase. Under ideal conditions, seed treatment with fractions of commercial extract of A. nodosum has improved the initial development of soybean seedlings, however, none or small changes were observed for the development of maize seedlings. This study shows the possibility of use of A. nodosum extract to favor the initial development of soybean crop. Additional studies are required to assess effects on fields and stresses attenuation to enable the use of the seaweed extract as a seed biostimulant.

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Jayaraman, Padmavathy. "Analysis of Bacillus subtilis 1604 spore germination". Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317752.

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Mais fontes

Livros sobre o assunto "Germination"

1

Harrington, Norman. Germination: Poems. Leicester: [the author], 1992.

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2

Paveg, Yann Erwan. Germination des colères. Plomodiern]: Kildorenn an trev, 2009.

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3

Bradbeer, J. W. Seed Dormancy and Germination. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4684-7747-4.

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4

Bradbeer, J. W. Seed Dormancy and Germination. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-011-6574-7.

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5

1915-, Poljakoff-Mayber Alexandra, ed. The germination of seeds. 4^a ed. Oxford: Pergamon Press, 1989.

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6

Sanah, Mat Asri Ngah, Zakaria Ibrahim 1948- e Institut Penyelidikan Perhutanan Malaysia, eds. Germination and seedling records. Kuala Lumpur: Forest Research Institute Malaysia, 1991.

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7

Bradbeer, J. W. Seed dormancy and germination. Glasgow: Blackie, 1988.

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8

1943-, Kigel Jaime, e Galili Gad 1952-, eds. Seed development and germination. New York: M. Dekker, 1995.

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9

Bradbeer, J. W. Seed dormancy and germination. London: Blackie Academic & Professional, 1988.

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10

J, Bradford K., e Nonogaki Hiroyuki, eds. Seed development, dormancy and germination. Oxford: Blackwell Pub., 2007.

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Mais fontes

Capítulos de livros sobre o assunto "Germination"

1

Kuijt, Job, e Bertel Hansen. "Germination". In Flowering Plants. Eudicots, 25–26. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09296-6_5.

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2

Bewley, J. Derek, Kent J. Bradford, Henk W. M. Hilhorst e Hiro Nonogaki. "Germination". In Seeds, 133–81. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-4693-4_4.

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3

Bradbeer, J. W. "Germination". In Seed Dormancy and Germination, 27–37. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4684-7747-4_4.

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4

Bradbeer, J. W. "Germination". In Seed Dormancy and Germination, 27–37. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-011-6574-7_4.

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5

Fenner, Michael. "Germination". In Seed Ecology, 87–102. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-4844-0_6.

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6

Gooch, Jan W. "Germination". In Encyclopedic Dictionary of Polymers, 895. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_13830.

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7

Allott, Miriam. "Germination". In Novelists on the Novel, 134–43. London: Routledge, 2023. http://dx.doi.org/10.4324/9781003351733-9.

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Copeland, Larry O., e Miller B. McDonald. "Seed Germination". In Principles of Seed Science and Technology, 59–110. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-1783-2_4.

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Copeland, Lawrence O., e Miller B. McDonald. "Seed Germination". In Principles of Seed Science and Technology, 72–123. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-1619-4_5.

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Martin, R. C., W. E. Pluskota e H. Nonogaki. "Seed Germination". In Plant Developmental Biology - Biotechnological Perspectives, 383–404. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02301-9_19.

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Trabalhos de conferências sobre o assunto "Germination"

1

Kumar, M. Rudra, Avinash Sharma, K. Sreenivasulu e G. Ramesh. "Pivot Based Seed Germination Assessment (PBSGA) Pattern for Germination Quality Analysis". In 2022 International Conference on Inventive Computation Technologies (ICICT). IEEE, 2022. http://dx.doi.org/10.1109/icict54344.2022.9850837.

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Avdeeva, Valentina, Elena Zorina, Julia Bezgina e Olga Kolosova. "Influence of ozone on germination and germinating energy of winter wheat seeds". In 17th International Scientific Conference Engineering for Rural Development. Latvia University of Agriculture, 2018. http://dx.doi.org/10.22616/erdev2018.17.n128.

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Camesano, Terri A., Paola A. Pinzo´n-Arango e Ramanathan Nagarajan. "Quantifying the Nanomechanical Properties of Bacillus Anthracis and Implications for Spore Killing". In ASME 2010 First Global Congress on NanoEngineering for Medicine and Biology. ASMEDC, 2010. http://dx.doi.org/10.1115/nemb2010-13032.

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Atomic force microscopy (AFM) was used to study the changes in the nanomechanical properties of the surface of Bacillus anthracis spores during germination. The Hertz model of continuum mechanics of contact was used to evaluate the Young’s or tensile elastic modulus of the spores before and after germination by applying the model to load-indentation curves obtained during force cycles. The highest elastic modulus was obtained with dormant spores, with average elasticity values of 197 ± 81 MPa. Fully vegetative spores had the lowest elasticity values. The elasticity decreased when spores were incubated with either L-alanine or inosine, and the decrease was greatest when both of these germinants were used in combination. We also found that as the spore elasticity values increasd, the indentation depth of the AFM probe into the surface increased, with vegetative B. anthracis cells having elasticity depths of up to 246.2 nm. We have shown that spore nanomechanical properties change during germination, and depend on the type of germinant that is used. Weakening of the spore cell wall may help explain why germinating cells are much more susceptible to anti-sporal agents. The study of elasticity of spores may be a valuable tool in the development of antibiotics or anti-sporal treatments.

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Abouelezz, Ahmed Helmy Hassan, e Talaat Ahmed. "The Efficacy of Two Household Cleaning and Disinfecting Agents on Lentil (Lens culinaris Medik) and Faba bean (Vicia faba) Seed Germination". In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2021. http://dx.doi.org/10.29117/quarfe.2021.0023.

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A germination test of Vicia faba and Lens culinaris seeds under the effect of bleach and vinegar was conducted for seven days, and the observations were recorded daily. The completely randomized design (CRD) was used to examine the germination with three replicates at the lab conditions. Six germination parameters were measured, including germination percentage (GP), germination index (GI), mean germination time (MGT), mean germination rate (MGR), vigour index (VI), plus the fresh weight (FW) and dry weight (DW) of Vicia faba and Lens culinaris seeds. As a legume crop seeds model, the efficacy of four treatment levels from 0.005% to 0.5% of bleach and vinegar on the germination was tested. A chemical analysis was performed using the ion chromatography (IC) to evaluate the effect of chloride and acetate anions up-take on the seedling germination in addition to other essential nutrients. A significant inhibition in seedling growth was observed with increasing the treatment concentration. The maximum inhibition was recorded for both seeds at 0.5%, followed by 0.1% levels, while a positive effect was represented with the lower concentrations. The chemical analysis of the up-taking active ingredients was corroborated by the germination outputs.

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Elisovetcaia, Dina, Raisa Ivanova, Ecaterina Popovschi e Natalia Mashcenco. "Quality changes during storage of beech seeds collected from different places". In Scientific International Symposium "Plant Protection – Achievements and Perspectives". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2023. http://dx.doi.org/10.53040/ppap2023.22.

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In this study, the changes in quality of Fagus sylvatica seeds collected in 2020 from different places of the Republic of Moldova (Plaiul Fagului, Hîrjauca) and Ukraine (Zakarpattia) on the third year of storage were evaluated. Beech seeds quality maintenance depended on the values of moisture, initial viability and seeds germination. The seeds from the Plaiul Fagului with a higher initial germination 76.7-84.0% and lower moisture content (8.69-9.24%) slightly reduced their quality during storage, by 1.0-2.3%.The germination indices such as germination rate, mean daily germination, average seed germination time, total time of seed germination, were improved by treatment of stored seeds with the natural bioregulator, genistifolioside. Treatment with genistifolioside also contributed to the elongation of seed roots by 17-24% in all variants.

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Belokurova, E. S., D. R. Kuzmina e O. R. Levchuk. "Effect of chlorella suspension on germination energy and germination capacity of malting barley". In Agrobiotechnology-2021. Publishing house of RGAU - MSHA, 2021. http://dx.doi.org/10.26897/978-5-9675-1855-3-2021-73.

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The article describes the influence of the microalgae Chlorella vulgaris, grown in laboratory conditions on different nutrient media, on the growth and development of barley grains. According to the results of the study, the authors conclude that it is possible to use Chlorella vulgaris as a natural biostimulant to increase the germination and germination energy of malting barley

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7

Sorokopudov, V. N. "MPACT OF ENVIRONMENT TEMPERATURE AND STRATIFICATION ON THE CITRUS AURANTIUM SEED GERMINATION". In Agrobiotechnology-2021. Publishing house RGAU-MSHA, 2021. http://dx.doi.org/10.26897/978-5-9675-1855-3-2021-110.

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This study is aimed at investigating the impact of the environment temperature and stratification on the Citrus aurantium seed germination. The results show that the optimum environment temperature for the seed germination is found to be 25°C with the maximum percentage of 90%. The stratification of seeds leads to the seed germination percentage decrease by 69% and germination speed increase by 7 days.

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Owen, Micheal D. K. "Weed Seed Dormancy and Germination". In Proceedings of the First Annual Crop Production and Protection Conference. Iowa State University, Digital Press, 1991. http://dx.doi.org/10.31274/icm-180809-360.

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Khudoyberdieva, S. "Viability testing and germination capacity". In Scientific International Symposium “Advanced Biotechnologies - Achievements and Prospects” (VIth Edition). Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2022. http://dx.doi.org/10.53040/abap6.2022.32.

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Caus, Maria. "Efectul șocului termic a temperaturilor suboptimale pozitive și a preparatului Reglalg asupra indicilor germinativi ai semințelor de castravete Cucumis Sativus L". In International Scientific Symposium "Plant Protection – Achievements and Prospects". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2020. http://dx.doi.org/10.53040/9789975347204.64.

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Cucumber (Cucumis sativus L.), cv Concurent and forms as Plai, F1; ELITA, F1; ASSIA, F1; Viorel, F1 și Cernomor, F1 seeds treated with distillate water (control) or water solutions of Reglalg preparation (1/100 and 1/1000 dilutions) were germinated at 27°C (control) or at different sub optimal positive low temperature (15°C, 13°C, 10°C, 8°C, 6°C and 4°C) to study germination characteristics. Final germination percent of cv Concurent seeds and germination energy decreased, while the conditional number of days, required for germination of one seed, increased with the decrease of temperature. The temperature of 13°C is the minimum below which all cucumber seeds do not germinate. Application of Reglalg preparation (dilution 1/1000) had a beneficial effect on the germination parameters under suboptimal temperature of 15⁰C.

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Relatórios de organizações sobre o assunto "Germination"

1

Jones, Marcus, e Nick E. Christians. Germination Curves Describe Variation in Germination Characteristics in Cultivars of Creeping Bentgrass. Ames: Iowa State University, Digital Repository, 2010. http://dx.doi.org/10.31274/farmprogressreports-180814-529.

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2

Dunn, Zachary Spencer. Portable Diagnostics and Rapid Germination. Office of Scientific and Technical Information (OSTI), dezembro de 2016. http://dx.doi.org/10.2172/1335753.

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3

Wuerslin, Nicole, Franz Lichtner, Nadia Podpora e Simone Whitecloud. Arctic seed sterilization and germination. Engineer Research and Development Center (U.S.), setembro de 2023. http://dx.doi.org/10.21079/11681/47682.

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We conducted growth chamber experiments to overcome challenges of native seed germination relating to disease and germination time. We selected five northern species, Eriophorum vaginatum, E. virginicum, Anemone patens var. multifida, Polemonium reptans, and Senecio con-gestus, for their native ranges and commercial-nursery availability. Recommended stratification time for each species was either unknown or a minimum of 60 days. Seeds were sterilized with 70% ethanol, 10% hydro-gen peroxide, or UVC light to identify which method most effectively pre-vented pathogen infection. To determine if stratification time could be reduced, seeds underwent a 30-day cold, moist stratification. We tested which growth medium was most conducive to germination of the sterilized, stratified seeds: filter paper or sterilized potting soil. In a separate experiment, we tested if three different levels of gibberellic acid (GA3; 0, 500, and 1000 ppm) could reduce stratification time to 15 days. The 70% ethanol was effective in a seed surface sterilization; an average of 84% of all seeds for all species treated showed no contamination. Germination following a 30-day cold, moist stratification was unsuccessful for most species tested in both growth media. Here, 1000 ppm GA3 with a 15-day cold, moist stratification showed considerable success with P. reptans.

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Dickman, Martin B., e Oded Yarden. Role of Phosphorylation in Fungal Spore Germination. United States Department of Agriculture, agosto de 1993. http://dx.doi.org/10.32747/1993.7568761.bard.

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Spore germination is a common and fundamental event in fungal development and in many instances an essential phase of fungal infection and dissemination. Spore germination is also critical for hyperparasites to function as biocontrol agents as well as in fermentation proceses. Our common objective is to understand the mechanisms which regulated spore germination and identify factors involved in pathogenicity related prepenetration development. Our approach is to exploit the overall similarity among filamentous fungi using both a plant pathogen (Colletotricum trifolii) and a model system that is genetically sophisticated (Neurospora crassa). The simulataneous use of two organisms has the advantage of the available tools in Neurospora to rapidly advance the functional analysis of genes involved in spore germination and development of an economically important fungal phytopathogen. Towards this we have isolated a protein kinase gene from C. trifolii (TB3) that is maximally expressed during the first hour of conidial germination and prior to any visible gene tube formation. Based on sequence similarities with other organisms, this gene is likely to be involved in the proliferative response in the fungus. In addition, TB3 was able to functionally complement a N. crassa mutant (COT-1). Pharmacological studies indicated the importance of calmodulin in both germination and appressorium differentiation. Using an antisense vector from N. crassa, direct inhibition of calmodulin results in prevention of differentiation as well as pathogenicity. Both cAMP dependent protein kinase (PKA) and protein kinase C (PKC) like genes have been cloned from C. trifolii. Biochemical inhibition of PKA prevents germination; biochemical inhibitors of PKC prevents appressorium differentiation. In order to analyze reversible phosphorylation as a regulatory mechanism, some ser.thr dephosphorylative events have also been analyzed. Type 2A and Type 2B (calcineurin) phosphatases have been identified and structurally and functionally analyzed in N. crassa during this project. Both phosphatases are essential for hyphal growth and maintenance of proper hyphal architecture. In addition, a first novel-type (PPT/PP5-like) ser/thr phosphatase has been identified in a filamentous fungus. The highly collaborative project has improved our understanding of a fundamental process in fungi, and has identified targets which can be used to develop new approaches for control of fungal plant pathogens as well as improve the performance of beneficial fungi in the field and in industry. In addition, the feasibility of molecular technology transfer in comparative mycology has been demonstrated.

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Ilinkin, Vladimir, Elina Yankova-Tsvetkova e Marina Stanilova. Germination and Viability of Seeds of Tanacetum Cinerariifolium (Asteraceae). "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, julho de 2020. http://dx.doi.org/10.7546/crabs.2020.07.09.

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Strey, Dan, e Nick Christians. Germination of Turf-Type Tall Fescue in ISU Compost. Ames: Iowa State University, Digital Repository, 2016. http://dx.doi.org/10.31274/farmprogressreports-180814-56.

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Bradford, Kent, Haim Nerson, Gregory Wellbaum e Menahem Edelstein. Environmental, Developmental and Physiological Determinants of Curcurbit Seed Quality. United States Department of Agriculture, outubro de 1998. http://dx.doi.org/10.32747/1998.7695837.bard.

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Environmental, developmental, physiological and biochemical determinants of cucurbit seed quality were investigated in field and laboratory experiments. The major factor influencing seed quality is seed maturity at harvest, with both immature and overmature seeds exhibiting reduced quality. Planting density and fruit load per plant can be manipulated to maximize seed yield per unit area without adversely affecting seed quality. Seeds harvested at optimal maturity will have the greatest germination vigor and will maintain quality longer during storage. Seed priming can improve germination rates and uniformity, but can reduce storage life. Tissues enclosing the embryo (the endosperm envelope and seed coat) are involved in regulating germination. The seed coat (testa) may restrict oxygen diffusion to the embryo in some muskmelon genotypes. Weakening of the endosperm envelope is associated with radicle emergence. Callose deposition in the endosperm envelope results in semipermeability. Defense proteins such as chitinase are also present in the endosperm. Numerous genes were identified that are expressed specifically in association with germination, but their functions are yet to be elucidated. These studies have provided guidelines for producing and harvesting cucurbit seeds for maximum yield and quality and have identified physiological and biochemical processes contributing to seed germination vigor.

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Palazzo, Antonio J., e Gurdarshan S. Brar. The Effects of Temperature on Germination of Eleven Festuca Cultivars. Fort Belvoir, VA: Defense Technical Information Center, agosto de 1997. http://dx.doi.org/10.21236/ada330578.

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Wilsey, Brian J., e Andrea Blong. Native Cover Crops: Germination and First-Season Cover and Biomass. Ames: Iowa State University, Digital Repository, 2005. http://dx.doi.org/10.31274/farmprogressreports-180814-135.

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Wilsey, Brian J., e Andrea Blong. Prairie Cover Crops: Germination and First-season Cover and Biomass. Ames: Iowa State University, Digital Repository, 2005. http://dx.doi.org/10.31274/farmprogressreports-180814-1840.

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