Bibliographies thématiques / SPIRODELA POLYRHIZA

Littérature scientifique sur le sujet « SPIRODELA POLYRHIZA »

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Publié le 16 janvier 2024

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Articles de revues sur le sujet "SPIRODELA POLYRHIZA"

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Tran, Ngoc Bao Tram, Thi Nhung Tran et Thi Nhu Phuong Hoang. « Morphological variation, chromosome number, and DNA barcoding of Giant Duckweed (Spirodela polyrhiza) in Vietnam ». Can Tho University Journal of Science 14, CBA (27 octobre 2022) : 61–67. http://dx.doi.org/10.22144/ctu.jen.2022.029.

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Our present study is the first systematic survey on duckweed biodiversity in Vietnam. More than 100 samples of Spirodela, Lemna, and Wolffia were collected throughout Vietnam and maintained under laboratory conditions. In this report, the morphological variation, chromosome number, and DNA barcoding on Spirodela samples were investigated. S. polyrhiza and S. intermedia are the only two species of Spirodela genus - the most ancient genus among the five duckweed genera. The obtained DNA sequences of atpF- atpH and psbK – psbI regions showed that all 29 Spirodela samples collected from different regions along Vietnam are S. polyrhiza. Specific SNPs of individual S. polyrhiza clones were identified in the psbK-psbI region. The differences in genome size (163 – 170 Mbp), frond size (0.80 – 1.25 cm2), frond shape (oval/circular symmetry/asymmetry), stomata (20.57 – 24.00 µm in length and 10.00 – 21.30 µm in width) and root number (4.75 – 6.69 roots) among six representatives S. polyrhiza clones were recorded. The chromosome number of these clones was uniformly 2n=40.
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Hoang, Phuong T. N., Jean-Marie Rouillard, Jiří Macas, Ivona Kubalová, Veit Schubert et Ingo Schubert. « Limitation of current probe design for oligo-cross-FISH, exemplified by chromosome evolution studies in duckweeds ». Chromosoma 130, no 1 (14 janvier 2021) : 15–25. http://dx.doi.org/10.1007/s00412-020-00749-2.

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AbstractDuckweeds represent a small, free-floating aquatic family (Lemnaceae) of the monocot order Alismatales with the fastest growth rate among flowering plants. They comprise five genera (Spirodela, Landoltia, Lemna, Wolffiella, and Wolffia) varying in genome size and chromosome number. Spirodela polyrhiza had the first sequenced duckweed genome. Cytogenetic maps are available for both species of the genus Spirodela (S. polyrhiza and S. intermedia). However, elucidation of chromosome homeology and evolutionary chromosome rearrangements by cross-FISH using Spirodela BAC probes to species of other duckweed genera has not been successful so far. We investigated the potential of chromosome-specific oligo-FISH probes to address these topics. We designed oligo-FISH probes specific for one S. intermedia and one S. polyrhiza chromosome (Fig. 1a). Our results show that these oligo-probes cross-hybridize with the homeologous regions of the other congeneric species, but are not suitable to uncover chromosomal homeology across duckweeds genera. This is most likely due to too low sequence similarity between the investigated genera and/or too low probe density on the target genomes. Finally, we suggest genus-specific design of oligo-probes to elucidate chromosome evolution across duckweed genera.
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Alekseeva, S. I., et Zh M. Okhlopkova. « Opportunities for Biotesting of the Water Environment for Heavy Metal Pollution Using a Plant Spirodela polyrhiza (L.) Schleid ». Ecology and Industry of Russia 25, no 5 (12 mai 2021) : 52–57. http://dx.doi.org/10.18412/1816-0395-2021-5-52-57.

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The methods of biotesting of the aquatic environment based on the representative of the duckweed family (lat. Lemnaceae) greater duckweed (Spirodela polyrhiza (L.) Schleid) were considered. A review is presented on the use of greater duckweed as a model object in biological testing, in partic-ular, when exposed to heavy metals salts. When cultivated Spirodela polyrhiza with the addition of heavy metals salts, a change in the growth and development of plants in the experienced line of plants was revealed, as well as a decrease in the content of chlorophyll a and b.
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Strzałek, Małgorzata, et Lech Kufel. « Light intensity drives different growth strategies in two duckweed species : Lemna minor L. and Spirodela polyrhiza (L.) Schleiden ». PeerJ 9 (20 décembre 2021) : e12698. http://dx.doi.org/10.7717/peerj.12698.

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Duckweed species Lemna minor and Spirodela polyrhiza are clonal plants with vegetative organs reduced to a frond and a root in L. minor or a frond and several roots in S. polyrhiza. They reproduce vegetatively by relatively rapid multiplication of their fronds. The habit of S. polyrhiza (large fronds with up to 21 roots) makes it a strong competitor among representatives of the family Lemnaceae, probably due to different resource-use strategies compared to small duckweed. In our study, light was the resource that affected the plants before and during the laboratory experiment. We sampled the plants from natural habitats differing in light conditions (open and shady) and grew them for 16 days in a thermostatic growth room at 22 °C under a 16:8 photoperiod and three light intensities (125, 236, 459 µmol photons m–2 s–1) to investigate the trade-off between frond enlargement and multiplication. Both species from the open habitat had higher growth rates based on the frond numbers and on surface area of fronds compared to plants from the shady habitat. They adopted different species-specific strategies in response to the experimental light conditions. The species size affected the growth rates in L. minor and S. polyrhiza. Spirodela polyrhiza grew slower than L. minor, but both species grew fastest at medium light intensity (236 µmol m–2 s–1). Lemna minor maintained the growth rates at high light intensity, while S. polyrhiza slowed down. Spirodela polyrhiza responded to deteriorating light conditions by increasing its frond surface area, thus optimising light capture. Lemna minor from the shady habitat enhanced light harvest by increasing chlorophyll a concentration, but did not invest more in frond enlargement than L. minor from the open habitat. Under shady conditions, S. polyrhiza is likely to achieve an advantage over L. minor due to the larger frond size of the former. Our findings suggest the existence of a trade-off between size and number in duckweed.
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Wang, Y. « Callus induction and frond regeneration in Spirodela polyrhiza ». Czech Journal of Genetics and Plant Breeding 52, No. 3 (23 septembre 2016) : 114–19. http://dx.doi.org/10.17221/134/2015-cjgpb.

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Said, D. S., T. Chrismadha, N. Mayasari, T. Widiyanto et A. Ramandita. « Nutritional Content and Growth Ability of Duckweed Spirodela polyrhiza on Various Culture Media ». IOP Conference Series : Earth and Environmental Science 1062, no 1 (1 juillet 2022) : 012009. http://dx.doi.org/10.1088/1755-1315/1062/1/012009.

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Abstract Giant duckweed (Spirodela polyrhiza) is one species of duckweed, distributed cosmopolitanly in stagnant freshwater. The duckweed has several potential uses such as for animal and fish feeds. However, its biological information in Indonesia is rare. A research was conducted in June to July 2019 to explore its nutritional content and growth ability. The growth ability experiment was done with two replications at The Research Center for Limnology, Indonesia Institute of Sciences laboratory. The indoor experiments used 3 types of culture media, namely P (mixture of Urea, NPK, and Gandasil); Q (water waste from catfish cultivation), and R (hydroponic fertilizer). Spirodela polyrhiza has a protein content of 24.10%; fat 1.74%; ash 1.78%, crude fiber 14.47%, and nitrogen-free extract of 57.89%. There were 15 types of amino acids observed in the biomass, made of as much as 13.1% w/w. The highest growth was obtained in R culture media with a specific growth rate (SGR): 8.54–16.53 % and productivity of 15.62–51.32 g/day/m2. Outdoor trials using the R media have a SGR value of 10.17–11.16% and productivity of 54.82–84.1 g/day/m2. Spirodela polyrhiza can be developed and have the potential to be used as an alternative natural feed source for aquaculture or another purpose. Further research is needed.
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Lizieri, Claudineia, Rosane Aguiar et Kacilda Naomi Kuki. « Manganese accumulation and its effects on three tropical aquatic macrophytes : Azolla caroliniana, Salvinia mínima and Spirodela polyrhiza ». Rodriguésia 62, no 4 (décembre 2011) : 909–17. http://dx.doi.org/10.1590/s2175-78602011000400016.

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Abstract The phytoremediation technique, which consists of using plants to remove ions, has been increasingly chosen over past decades due to its low-cost technology to mitigate contaminated areas. The aim of this study was to evaluate the potential of the aquatic macrophytes, Azolla caroliniana Willd, Salvinia minima Baker and Spirodela polyrhiza (L.) Schleiden, to accumulate manganese (Mn), an element which, at high concentrations, may be toxic to human populations. The three species accumulated Mn in their tissues and the absorption was independent of the metal concentration in the solution. Spirodela polyrhiza accumulated Mn at higher concentrations of the ion (17.062 mg g-1 MS), followed by S. minima (4.283 mg g-1 MS) and A. caroliniana (1.341 mg g-1 MS). Manganese excess reduced total chlorophyll content in all three species. Carotenoid content was reduced in A. caroliniana (27.02 %) and S. polyrhiza (25.34 %). Growth was only significantly reduced (21.34%) in S. polyrhiza. The species A. caroliniana and S. minima were able to tolerate excess Mn, but were inefficient regarding the accumulation of high concentrations of the metal. High accumulated Mn content in the tissues of S. polyrhiza suggests that the species is able to accumulate this element. Therefore, it has potential for use in phytoremediation and provides a new resource for exploring the Mn accumulation mechanism.
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Ng, Yin Sim, et Derek Juinn Chieh Chan. « The enhancement of treatment capacity and the performance of phytoremediation system by fed batch and periodic harvesting ». RSC Advances 11, no 11 (2021) : 6049–59. http://dx.doi.org/10.1039/d0ra08088h.

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AHAMMED, TAMSEL, SHAHRIAR ISLAM, MD RUHUL AMIN, MD MOSTAFA KAMAL et MD OMAR FARUQUE. « EFFECT OF SPIRODELA POLYRHIZA ON PHYSIO-CHEMICAL CHANGES IN INDUSTRIAL WASTEWATER ». Pollution Research 42, no 04 (2023) : 413–23. http://dx.doi.org/10.53550/pr.2023.v42i04.002.

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The biodiversity has experienced a significant increase in heavy metal contamination, which has a direct impact on aquatic environments. Industrial wastewater, municipal waste, burning fossil fuels, mining, and pesticides are the main sources of pollution. Due to its ability to produce a significant amount of biomass and its high level of stress tolerance, Spirodela polyrhiza (S. polyrhiza) is known as a phytoremediation aquatic plant. Because of their rapid development, simplicity in harvesting, and potential to remove heavy metals from wastewater S. polyrhiza could be an important tool for the treatment of industrial wastewater. This research analyzes how incorporating S. polyrhiza into industrial effluent can improve its physiochemical characteristics, like pH, Chemical oxygen demand (COD), Chlorides, total hardness, sulphates, total dissolved solids (TDS), Cu, Ni, Fe, Zn, Pb, and Ca. In this experiment industrial wastewater was treated using S. polyrhiza for 45 days on the basis of the depth of water (6", 12", and 18"). From the experimental study after D45 color changed brownish to light brownish. After D45 Chlorides level (mg/l) decreased 295.50±17.73 to 251.20±16.007. The initial COD value (mg/l) of the wastewater was 252.330±6.78 and after 45 days of treatment, the value reduced to 93.87±1. The total hardness (mg/ l) of the wastewater was reduced from 1862.8±43.9 to 1223.9±50.93 after treatment. On the other hand TDS value (mg/l) increased from 583.6±3.9 to 815.3±15.7 after the treatment. After 45 days of treatment with S. polyrhiza the copper level (mg/l) was reduced from 0.170±0.020 to 0.098±0.032. Similarly, the levels (mg/l) of Pb, Fe, Zn, and Ni were reduced from 0.222±0.029 to 0.061±0.035, 10.306±1.429 to 0.596±0.110, 0.168±0.055 to 0.084±0.023 and 0.150±0.029 to 0.078±0.018 respectively. The findings indicate that S. polyrhiza might with stand heavy metals and could be a feasible option for the phytoremediation of physiochemical contaminants and heavy metals derived from industrial wastewater
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Islam, Shriful, Fuad Bin Nasir, Muhammad Azizul Hoq et Gulam Md. Munna. « Chromium Removal from Water Using Spirodela polyrhiza ». Asian Journal of Applied Sciences 10, no 3 (15 juin 2017) : 145–50. http://dx.doi.org/10.3923/ajaps.2017.145.150.

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Thèses sur le sujet "SPIRODELA POLYRHIZA"

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Saadi, El Hassani Amina. « Toxicité et bioaccumulation du cuivre et du cadmium chez deux végétaux dulçaquicoles, Spirodela Polyrhiza L. Et Egeria Densa Planchon. : transfert dans une chaîne alimentaire ». Rouen, 1992. http://www.theses.fr/1992ROUE04NR.

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L'étude écotoxicologique réalisée sur deux macrophytes dulçaquicoles a permis de montrer que Spirodela polyrhiza est plus sensible à l'effet toxique du Cu et du Cd qu'Egeria densa. Les bioessais effectués ont montré que les mêmes symptômes de morbidité sont observés chez les deux espèces et avec les deux métaux. Ils sont plus marqués avec le temps et lorsque le milieu de culture synthétique est remplacé par l'eau pure. Cependant, l'observation microscopique a révélé une différence à l'échelle cellulaire : plasmolysse dans le cas du Cu et turgescence dans le cas du Cd. Il est démontré aussi que pour ces deux métaux et chez ces deux espèces, la bioaccumulation a lieu essentiellement dans les racines et que l'addition du diéthyldithiocarbanate de sodium (DDTC) dans le milieu réduit nettement cette bioaccumulation. Au cours de ce travail, il a été mis au point une méthode de dosage du Cu et du Cd dnas les tissus végétaux par CLHP. L'élaboration d'un modèle de chaîne trophique a révélé que le Cd ingéré par le poisson Ctenopharyngodon idella via Spirodela polyrhiza est éliminé en grande partie dans les fecès au cours de la première semaine. L'analyse en composantes principales a montré que le métal est surtout accumulé dans les viscères mais très peu dans la chair et les branchies du poisson.
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Reimann, Rezarta [Verfasser]. « Mechanisms of starch degradation in turions of Spirodela polyrhiza / submitted by Rezarta Reimann ». 2003. http://d-nb.info/982241763/34.

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LI, JIE-YING, et 李婕嫈. « Effect of Iron Deficiency to the Photosystem II and Nitrogen Assimilation in Spirodela polyrhiza ». Thesis, 2017. http://ndltd.ncl.edu.tw/handle/635zbv.

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碩士
國立臺南大學
生物科技學系碩士班
105
Iron is an abundant element on the earth crust that’s necessary microelement in the process of plant growth and development. It usually exist in ferrous from (Fe2 +) supply plants absorbed and utilized but it structure often be changed by the environment affected. Over time, the pollution arises along with the rapid development of industrial and commercial through the discharge of sewage into the rivers and lakes. lead to iron can’t be transfer to ferrous from to be used for plant absorption resulting the plant of iron deficiency problem. Because the rapid growth of Spirodela polyrhiza and sensitive to environment so it often be used as a model organism for environmental monitoring. In this study, we choose Spirodela polyrhiza to observe the effects of iron deficiency on the growth. The accumulation of reactive oxygen species (ROS) was observed by staining method. After that, the photosynthetic efficiency was detected by rapid chlorophyll fluorescence induction kinetics (JIP-test) and using biochemical analysis to investigate the effects of iron deficiency on RuBisCo and specific protein (GS, Hsp70) by SDS-PAGE and Western Blot method. The results showed up the iron deficiency absolute affect the growth of Spirodela polyrhiza, and lead to the accumulation of superoxide anion, indicating the Spirodela polyrhiza is in oxidative stress environment. Further observed, because of electron transfer not only blocked in photosynthesis resulting overall photosynthetic efficiency decreases, also affecting the ability of nitrogen assimilation.
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CHUANG, CHIEH, et 莊捷. « Effects of Diethyl Phthalate on the Efficiency of Photosystem II in Greater Duckweed (Spirodela polyrhiza L.) ». Thesis, 2016. http://ndltd.ncl.edu.tw/handle/95429691533971945816.

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碩士
國立臺南大學
生物科技學系碩士班
104
Plasticizes (PAEs) bear numeral functions, such as adjusting the hardness and luster of product, cost reduction...etc, allowing them to be widely used in industries, for instances, plastic additives. However, this prevailing substance has great impact on our environments. Absorption by plants and animals can lead to tissue lesions after accumulation within individuals. Diethyl phthalate (DEP), a member of PAEs, is commonly used in solvents, nursing supplies, ink, and other items. Though having lower toxicity compared to other plasticizers, DEP can still pose safety concerns due to discharging into rivers and lakes after over-usage. In this study, we choose Spirodela polyrhiza L. Schleid. as our sample. By using JIP-test, we analyzed the effect caused by DEP on the donor side, the receptor side and reaction center of photosystem II (PSII) based on fast chlorophyll fluorescence induction dynamics analysis. The result indicates that DEP will affect the electron transfer efficiency of oxygen-evolving complex (OEC) downstream receptors. Reaction center activity was not good during primary light reaction at J site, suggesting that the redox efficiency was decreased between QA and QB. On the other hand, the rise of O site of Spirodela polyrhiza in fluorescent curve under DEP treatment implies that the light absorption complexes of PSII (LHCII) may be damaged, resulting in the rise of basic fluorescent value. Meanwhile, dissipated energy in PSII increased drastically, thus decreasing the energy transferred by electron transport chain. In summary, the photosynthesis efficiency of Spirodela polyrhiza decreases significantly under DEP treatments.
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SHRIVASTAV, AVANISH KUMAR. « MASS PRODUCTION OF AQUATIC MACROPHYTE SPIRODELA POLYRHIZA, ITS AMINO ACID AND FATTY ACID PROFILES STUDY AND ITS USE IN CARPS’ FEED FORMULATION ». Thesis, 2022. http://dspace.dtu.ac.in:8080/jspui/handle/repository/20403.

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Aquaculture is one of the fastest growing food producing sectors in the world. It contributes immensely in food security, livelihood and employment generation. Fish and fishery products provide a healthy food for human consumption with high protein and low saturated fat. In commercial aquaculture, feed constitutes around 60-70% of total expenditure due to the use of fish meal and fish oil as a prime source of protein and lipid, respectively. The limited availability of fishmeal and its price are major concerns in the present scenario. Therefore, the rising price and shortage of diet components created a crucial call to find out an inexpensive, abundantly available and innovative alternative raw material to be used in place of fish meal for fish feed without compromising the growth and meat quality of fish. Freshwater duckweeds are a potential ingredient to replace the costly fishmeal in aquaculture. The present study aimed to evaluate the application of freshwater macrophytes as fish feed ingredient. In the present study twelve macrophytes were collected from different water bodies and were cultured in outdoor cemented tanks. Among twelve different cultured macrophytes, greater duckweed Spirodela polyrhiza was selected as a potential fish feed ingredient for its nutritional value. The culture technique of selected macrophyte S. polyrhiza was developed in outdoor cemented tanks using different manures. The organic manure was found suitable for the production of S. polyrhiza. The organic manure was used for the mass production of S. polyrhiza in ponds. The production rate of S. polyrhiza in ponds was 2020±150 tonnes/ha/year. Fish feeds were formulated by using Winfeed 2.8 software package (WinFeed UK Limited, Cambridge, United Kingdom). The incorporation of S. polyrhiza at various levels in the diets of Labeo rohita and Cyprinus carpio showed the beneficial effect on the fishes. It improved the digestive enzyme physiology of the fishes, thereby enhanced the growth rate. The biochemical composition study of fish showed that there was improvement in the compositions of fishes like, crude protein, crude lipid and amino acids contents. The omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) contents increased in S. polyrhiza supplemented diets fed common carp compared to other diets fed fish. Expression levels of delta-6-desaturase (fads2d6), elongation of very long chain fatty acids protein 2 (elovl2), elongation of very long-chain fatty acids protein 5 (elovl5) and fatty acid synthase (fas) were up-regulated in common carp fed greater duckweed based diets compared to others. The knowledge generated from the present study is useful in the formulation of cost-effected diets for carps and thereby, the production of nutrient rich fishes for consumers.
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HSU, YI-TE, et 許以德. « The Function of Glutamate Dehydrogenase in the Assimilation of Ammonia in Spirodela Polyrhiza Under Diethyl Phthalate-induced Stress ». Thesis, 2019. http://ndltd.ncl.edu.tw/handle/m3753p.

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碩士
國立臺南大學
生物科技學系碩士班
107
Plasticizers are a kind of compounds that often use as a shaping agents and stabilizer in various types of products. With the development of industry, plasticizers are widely used in the production of various industrial and consumer goods. However, phthalates, the most prevalent plasticizers, are very easy to release from the product into the environment because they combine with substances by non-chemical bond. Duckweed is a common aquatic herb that is found in freshwater from temperate to tropical regions. Because of its high sensitivity to many pollutants, duckweed is often used as an indicator of the water environment. Our laboratory has conducted a number of studies to investigate the toxic effects of diethyl phthalate (DEP), a type of short-chain phthalate, on Greater duckweed (S. polyrhiza). We found that DEP causes chloroplast electron transport chain disorder and decreased photosynthesis efficiency, accumulation of reactive oxidants species (ROS) and malondialdehyde (MDA), increased ammonia nitrogen content, and a decrease in growth rate. In this study, we found that in the treatment of 0.25, 0.5, 1 mM DEP, the water-soaked appeared; in 2 mM DEP treatment, the yellowing phenomenon appeared, the cause of water-soked greater duckweed increased endogenous esterase as a detoxification means of DEP, the cell structure is destroyed by DEP treatment, or the carbon regulation is changed in DEP stress. The relative growth rate (RGR) showed a negative effect under DEP treatment, indicating that DEP caused cell division and reproductive toxicity to greater duckweed. DEP caused the change of nitrogen distribution, and nitrogen concentrate to chlorophyll at 0.25, 0.5 mM DEP concentration. Nitrogen is released from chlorophyll by 1,2 mM DEP treatment. The increase of low concentration of chlorophyll may be caused by the increase of glutamine synthetase (GS) activity, and the high concentration of chlorophyll may be caused by chlorophyll procedurality degradation. High concentration of DEP treatment caused GS-GOGAT cycle disability, NADH-GDH activity increased, which means that glutamate dehydrogenase (GDH) may be used as a substitute for ammonia in the DEP stress and the product of GS-GOGAT cycle and GDH pathway tends to different route of utilization. DEP treatment increases the activity of succinate dehydrogenase (SDH), indicating that the rate of TCA cycle rised under DEP stress, and GDH acts as a provider of TCA cycle substrates NAD-GDH activity also increased along with SDH activity. Correlation analysis result indicated that GDH 1 and SDH 1 gene expression showed a highly positive correlation; GDH 2 and GS total activity showed a highly negative correlation, which revealed the possible regulation mechanism of GDH gene under DEP stress.
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Phunsin-Kantha et 甘富信. « The Effects of Light Regime and Nutrient on the Growth of Duckweed (Spirodela polyrhiza) and their Application on the Aquaponic Culture with Red Tilapia (Oreochromis niloticus) or Crayfish (Procambarus clarkii) ». Thesis, 2017. http://ndltd.ncl.edu.tw/handle/832mgd.

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碩士
國立臺灣海洋大學
水產養殖學系
105
Duckweed is an aquatic plant that can play the best role in an aquaponics system for its being very productive and capable of cleaning the water in which the aquatic animal inhabits. Here we used Spirodela polyrhiza, one of the most studied duckweed species. In Experiment 1 (Chapter 2), we successfully employed image analysis system to get covering area of duckweed and estimate duckweed fresh dry weight through weight-area correlation analysis. Considering the convenience and popularity of smart phone, we would prefer it for image taking than digital camera. Equipped with this effective tool to estimate duckweed biomass, we were then able to find out the factors affecting duckweed growth in the following experiments, such as light source and photoperiod (Experiment 2 – Chapter 3) and light intensity and nitrogen nutrient (Experiment 3 – Chapter 4). Both LED white and fluorescent T5 achieved better duckweed growth and nutrient stripping than LED blue, but no difference in between of the former two. LED white was the preferred light source for its higher energy saving than fluorescent T5. Photoperiod had no effects on duckweed growth. However, 16L:8D was chosen for its higher nutrient stripping than 12L:12D but similar performance as 24L:0D. Light intensity at 55, 110 and 220 PPFD (mol m-2s-1) exhibited no effects on duckweed growth and nutrient stripping. Concomitantly, light intensity at 55 mol m-2s-1 should be used if the facility environment met, such as light tube specification and accommodation space. The highest nitrogen nutrient level, 40 mg L-1 total nitrogen (TN) was recommended since it resulted in higher duckweed growth than the other two lower levels, 20 and 10 mg L-1 TN. While the optimal light regime and nutrient level for duckweed’s growth and nutrient stripping became available, we were readily to conduct aquaponics study with duckweed (Experiment 4 – Chapter 5). Red tilapia (Oreochromis niloticus) and red swamp crayfish (Procambarus clarkii) were chosen as the animals since finfish and crustacean, respectively, may exhibit different nitrogen metabolism and affect nitrogen nutrient cycle in the system. Although total ammonia nitrogen and total nitrogen concentration in crayfish aquaponics system were higher than those in tilapia system, the duckweed growth remained similar. Disregarding the difference in animal or plant density at present study, duckweed can effectively improve water quality in either tilapia or crayfish aquaponics system as compared to tilapia or crayfish alone aquaculture system.
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Chapitres de livres sur le sujet "SPIRODELA POLYRHIZA"

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Fourounjian, Paul. « Transcriptome Responses of Spirodela polyrhiza ». Dans The Duckweed Genomes, 133–36. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-11045-1_13.

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Goswami, Chandrima, Kaushik Bandyopadhyay et Arunabha Majumder. « Spirodela Polyrhiza : An Efficient Hyperaccumulator of Nickel at Low Concentration ». Dans Lecture Notes in Civil Engineering, 207–12. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51350-4_22.

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Goswami, Chandrima, Kaushik Bandyopadhyay et Arunabha Majumder. « Spirodela polyrhiza : A Potential Accumulator of Pb from Contaminated Water ». Dans Lecture Notes in Civil Engineering, 16–21. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02707-0_3.

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Wu, Tian, Annelore Natran, Lucas Prost, Eylem Aydogdu, Yves Van de Peer et Quinten Bafort. « Studying Whole-Genome Duplication Using Experimental Evolution of Spirodela polyrhiza ». Dans Methods in Molecular Biology, 373–90. New York, NY : Springer US, 2023. http://dx.doi.org/10.1007/978-1-0716-2561-3_19.

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Wani, Rifat Ara, Bashir Ahmad Ganaie et Manzoor Ahmad Shah. « Phytoremediation Potential of Spirodela polyrhiza for Cd and Cr Under Hydroponic Culture ». Dans Biodiversity of Freshwater Ecosystems, 197–213. Boca Raton : Apple Academic Press, 2022. http://dx.doi.org/10.1201/9781003277125-10.

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Gaur, Rubia Zahid, et Surendra S. Suthar. « Impact of Varied Ratio of Duckweed (Spirodela polyrhiza) and Waste-Activated Sludge on Anaerobic Digestion ». Dans Waste Management and Resource Efficiency, 651–58. Singapore : Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7290-1_54.

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Pietrini, Fabrizio, Laura Passatore, Serena Carloni et Massimo Zacchini. « Non-standard Physiological Endpoints to Evaluate the Toxicity of Emerging Contaminants in Aquatic Plants : A Case Study on the Exposure of Lemna minor L. and Spirodela polyrhiza (L.) Schleid. to Dimethyl Phthalate (DMP) ». Dans Emerging Contaminants and Associated Treatment Technologies, 87–108. Cham : Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-22269-6_4.

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Roy, Dibakar, Dasari Sreekanth, Deepak Pawar, Himanshu Mahawar et Kamal K. Barman. « Phytoremediation of Arsenic Contaminated Water Using Aquatic, Semi-Aquatic and Submerged Weeds ». Dans Biodegradation [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98961.

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Résumé :
Arsenic (As) is the one the most toxic element present in earth which poses a serious threat to the environment and human health. Arsenic contamination of drinking water in South and Southeast Asia reported one of the most threatening problems that causes serious health hazard of millions of people of India and Bangladesh. Further, use of arsenic contaminated ground water for irrigation purpose causes entry of arsenic in food crops, especially in Rice and other vegetable crops. Currently various chemical technologies utilized for As removal from contaminated water like adsorption and co-precipitation using salts, activated charcoal, ion exchange, membrane filtration etc. are very costly and cannot be used for large scale for drinking and agriculture use. In contrast, phytoremediation utilizes green plats to remove pollutants from contaminated water using various mechanisms such as rhizofiltration, phytoextraction, phytostabilization, phytodegrartion and phytovolatilization. A large numbers of terrestrial and aquatic weed flora have been identified so far having hyper metal, metalloid and organic pollutant removal capacity. Among the terrestrial weed flora Arundo donax, Typha latifolia, Typha angustifolia, Vetivaria zizinoids etc. are the hyper As accumulator. Similarly Eicchornea crassipes (Water hyacinth), Pistia stratiotes (water lettuce), Lemna minor (duck weed), Hyrdilla verticillata, Ceratophyllum demersum, Spirodella polyrhiza, Azola, Wolfia spp., etc. are also capable to extract higher amount of arsenic from contaminated water. These weed flora having As tolerance mechanism in their system and thus remediate As contaminated water vis-à-vis continue their life cycle. In this chapter we will discuss about As extraction potential of various aquatic and semi aquatic weeds from contaminated water, their tolerance mechanism, future scope and their application in future world mitigating As contamination in water resources.
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Actes de conférences sur le sujet "SPIRODELA POLYRHIZA"

1

Li, Hongtao, Yu Zhao, Ke Zhu, Jinju Wang, Qingdai Liu et Hongjie An. « Analysis of the Chlorophyll a Fluorescence Transient of Spirodela polyrhiza by JIP-Test ». Dans 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5515740.

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Alekseeva, S. I., et Zh M. Okhlopkova. « INFLUENCE OF ULTRAVIOLET RAYS ON THE POPULATION OF THE SPIRODELA POLYRHIZA (L.) SCHLEID ». Dans The All-Russian Scientific Conference with International Participation and Schools of Young Scientists "Mechanisms of resistance of plants and microorganisms to unfavorable environmental". SIPPB SB RAS, 2018. http://dx.doi.org/10.31255/978-5-94797-319-8-1018-1020.

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