Bibliografias temáticas / Effect of perchlorates on Plants

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Literatura científica selecionada sobre o tema "Effect of perchlorates on Plants"

Autor: Grafiati
Publicado: 25 de julho de 2024
Última modificação: 31 de julho de 2024

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Artigos de revistas sobre o assunto "Effect of perchlorates on Plants"

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Oze, Christopher, Joshua Beisel, Edward Dabsys, Jacqueline Dall, Gretchen North, Allan Scott, Alandra Marie Lopez, Randall Holmes e Scott Fendorf. "Perchlorate and Agriculture on Mars". Soil Systems 5, n.º 3 (24 de junho de 2021): 37. http://dx.doi.org/10.3390/soilsystems5030037.

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Perchlorate (ClO4−) is globally enriched in Martian regolith at levels commonly toxic to plants. Consequently, perchlorate in Martian regolith presents an obstacle to developing agriculture on Mars. Here, we assess the effect of perchlorate at different concentrations on plant growth and germination, as well as metal release in a simulated Gusev Crater regolith and generic potting soil. The presence of perchlorate was uniformly detrimental to plant growth regardless of growing medium. Plants in potting soil were able to germinate in 1 wt.% perchlorate; however, these plants showed restricted growth and decreased leaf area and biomass. Some plants were able to germinate in regolith simulant without perchlorate; however, they showed reduced growth. In Martian regolith simulant, the presence of perchlorate prevented germination across all plant treatments. Soil column flow-through experiments of perchlorate-containing Martian regolith simulant and potting soil were unable to completely remove perchlorate despite its high solubility. Additionally, perchlorate present in the simulant increased metal/phosphorous release, which may also affect plant growth and biochemistry. Our results support that perchlorate may modify metal availability to such an extent that, even with the successful removal of perchlorate, Martian regolith may continue to be toxic to plant life. Overall, our study demonstrates that the presence of perchlorate in Martian regolith provides a significant challenge in its use as an agricultural substrate and that further steps, such as restricted metal availability and nutrient enrichment, are necessary to make it a viable growing substrate.
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Gureeva, Maria V., e Artem P. Gureev. "Molecular Mechanisms Determining the Role of Bacteria from the Genus Azospirillum in Plant Adaptation to Damaging Environmental Factors". International Journal of Molecular Sciences 24, n.º 11 (23 de maio de 2023): 9122. http://dx.doi.org/10.3390/ijms24119122.

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Agricultural plants are continuously exposed to environmental stressors, which can lead to a significant reduction in yield and even the death of plants. One of the ways to mitigate stress impacts is the inoculation of plant growth-promoting rhizobacteria (PGPR), including bacteria from the genus Azospirillum, into the rhizosphere of plants. Different representatives of this genus have different sensitivities or resistances to osmotic stress, pesticides, heavy metals, hydrocarbons, and perchlorate and also have the ability to mitigate the consequences of such stresses for plants. Bacteria from the genus Azospirillum contribute to the bioremediation of polluted soils and induce systemic resistance and have a positive effect on plants under stress by synthesizing siderophores and polysaccharides and modulating the levels of phytohormones, osmolytes, and volatile organic compounds in plants, as well as altering the efficiency of photosynthesis and the antioxidant defense system. In this review, we focus on molecular genetic features that provide bacterial resistance to various stress factors as well as on Azospirillum-related pathways for increasing plant resistance to unfavorable anthropogenic and natural factors.
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He, Hongzhi, Haishuo Gao, Guikui Chen, Huashou Li, Hai Lin e Zhenzhen Shu. "Effects of perchlorate on growth of four wetland plants and its accumulation in plant tissues". Environmental Science and Pollution Research 20, n.º 10 (15 de maio de 2013): 7301–8. http://dx.doi.org/10.1007/s11356-013-1744-4.

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Ismail Saleh, Al Sammarrai Anes, V. V. Korobko, N. V. Pchelintseva e E. A. Samsonova. "Effect of Polysubstituted Perchlorates Halkogen(Thio)Pyrilium on Morphogenesis of Wheat Seedlings". Chemistry. Biology. Ecology 17, n.º 4 (2017): 413–19. http://dx.doi.org/10.18500/1816-9775-2017-17-4-413-419.

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Góbi, Sándor, Matthew J. Abplanalp e Ralf I. Kaiser. "EFFECT OF PERCHLORATES ON ELECTRON RADIOLYSIS OF GLYCINE WITH APPLICATION TO MARS". Astrophysical Journal 822, n.º 1 (26 de abril de 2016): 8. http://dx.doi.org/10.3847/0004-637x/822/1/8.

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Kim, Shin-Jo, Ki-Yong Lee, Ki-Cheol Lee, Namil Chung e Dong-Il Jung. "Effect of general ions on biological treatment of perchlorates in smelting wastewater". Desalination and Water Treatment 48, n.º 1-3 (outubro de 2012): 60–69. http://dx.doi.org/10.1080/19443994.2012.698795.

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Ouédraogo, Jean Claude W., Edouard Tapsoba, Sié Faustin Sib e Yvonne Libona Bonzi-Coulibaly. "Styrylpyrylium Salts: and NMR High-Resolution Spectroscopy (1D and 2D)". International Journal of Spectroscopy 2010 (29 de junho de 2010): 1–6. http://dx.doi.org/10.1155/2010/246821.

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and NMR high-resolution spectroscopy (1D and 2D) (, -COSY, HSQC, HMBC) for four styrylpyrylium perchlorates were carried out and signal attributions are reported. Chemical shifts observed on NMR spectra for the styrylpyrylium salts were compared with net atomic charge for carbon obtained by AM1 semiempirical calculations. The position of the styryl group present low effect on chemical shifts for carbon atoms, while the presence of methyl group led to the unshielding of the substituted carbon.
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Knop, Jim-Marcel, Sanjib K. Mukherjee, Stewart Gault, Charles S. Cockell e Roland Winter. "Structural Responses of Nucleic Acids to Mars-Relevant Salts at Deep Subsurface Conditions". Life 12, n.º 5 (2 de maio de 2022): 677. http://dx.doi.org/10.3390/life12050677.

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High pressure deep subsurface environments of Mars may harbor high concentrations of dissolved salts, such as perchlorates, yet we know little about how these salts influence the conditions for life, particularly in combination with high hydrostatic pressure. We investigated the effects of high magnesium perchlorate concentrations compared to sodium and magnesium chloride salts and high pressure on the conformational dynamics and stability of double-stranded B-DNA and, as a representative of a non-canonical DNA structure, a DNA-hairpin (HP), whose structure is known to be rather pressure-sensitive. To this end, fluorescence spectroscopies including single-molecule FRET methodology were applied. Our results show that the stability both of the B-DNA as well as the DNA-HP is largely preserved at high pressures and high salt concentrations, including the presence of chaotropic perchlorates. The perchlorate anion has a small destabilizing effect compared to chloride, however. These results show that high pressures at the kbar level and perchlorate anions can modify the stability of nucleic acids, but that they do not represent a barrier to the gross stability of such molecules in conditions associated with the deep subsurface of Mars.
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Marin, Alexandru, Maria-Daniela Sandu, George-Ovidiu Iorga, Gabriel Epure e Dănuț Moşteanu. "SEM/EDX and FTIR/ATR Behavior of Ammonium Perchlorate Under Accelerated Aging in a New Solid Rocket Motor Fuel Composition with Superior Explosive and Mechanical Performance". International conference KNOWLEDGE-BASED ORGANIZATION 30, n.º 3 (1 de junho de 2024): 1–7. http://dx.doi.org/10.2478/kbo-2024-0088.

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Abstract The oxidation potential of perchlorates is high, which makes this material suitable for fuels with high specific impulse. Perchlorates are characterized by a ClO4- moiety/anion in their molecular structure and are crystalline materials used in the formation of solid fuels. Ammonium perchlorate (AP) particle size and shape influence the manufacturing process of fuels and their burning rate. The physical and chemical processes that can occur in the natural degradation process of composite fuels are related to molecular reactions and diffusion phenomena governed by kinetic processes and can be accelerated by increasing the temperature. The paper presents studies carried out by scanning electron microscopy and infrared spectrometry on the behavior of ammonium perchlorate in the new composite material of solid rocket motor fuel under the effect of high temperature, in the range of 65-85οC, at regular time intervals. The self-initiation temperature was also determined, with a temperature rise rate controlled at 5ºC/minute. It is very likely that these accelerated aging studies will show the changes that occur in the stability, sensitivity, mechanical and functional properties of fuels during their lifetime.
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Penov Gaši, Katarina M., Dušica Rackov Čolic, Otto N. Arcson, Zvonimir O. Sakač, Evgenija A. Djurendić, Marija N. Sakač, Ljubica Medic-Mijačevic e Dušan A. Miljković. "Improved Methods for Obtaining Immonium Perchlorates and Enamines of Solanidine Type Steroidal Alkaloids". Collection of Czechoslovak Chemical Communications 61, n.º 11 (1996): 1655–61. http://dx.doi.org/10.1135/cccc19961655.

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Oxidation of solanidine and some of its derivatives with mercury(II) acetate in acetone afforded corresponding N-22 immonium perchlorates or 22(23)-enamines. It has been found that the effect of solvents on regioselectivity e.g. formation N-22 and N-16 immonium salts, was remarkable. The isomerisation of 22(23)-enamines into corresponding 20(22)-enamines, potentialy important intermediates in planned chemical degradation of solanidine to steroidal hormones, was performed in 0.1% acetic acid in ether, or in dichloromethane (chloroform).
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Teses / dissertações sobre o assunto "Effect of perchlorates on Plants"

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Struckhoff, Garrett Cletus Parkin Gene F. "Plant-assisted bioremediation of perchlorate and the effect of plants on redox conditions and biodiversity in low and high organic carbon soil". [Iowa City, Iowa] : University of Iowa, 2009. http://ir.uiowa.edu/etd/441.

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Struckhoff, Garrett Cletus. "Plant-assisted bioremediation of perchlorate and the effect of plants on redox conditions and biodiversity in low and high organic carbon soil". Diss., University of Iowa, 2009. https://ir.uiowa.edu/etd/441.

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Perchlorate is a known inhibitor of the human thyroid gland. Perchlorate is destroyed by ubiquitous perchlorate-reducing bacteria. The bacteria often lack sufficient electron donor. Research was undertaken to evaluate the relationship between plants and perchlorate-reducing bacteria. To what degree can plant-produced electron donors stimulate perchlorate reduction in low organic carbon (LOC) and high organic carbon (HOC) soil? A complication is that plants have been shown to influence redox conditions which may inhibit perchlorate reduction. The removal of perchlorate in a flow-through reactor was monitored with variables of soil organic carbon, hybrid poplar trees, and bioaugmentation. The biodiversity was monitored using denaturing gradient gel electrophoresis. Low oxidation-reduction potential (ORP) was shown to indicate the capacity for greater perchlorate removal in soil. However, in planted LOC soil systems, evidence suggests that perchlorate reduction may also be possible at higher bulk redox conditions than previously observed. Increased hydraulic retention time was shown to both lower bulk ORP and increase perchlorate removal. Radiolabeled perchlorate was used to find that in planted systems as much as 11.7% of the influent perchlorate mass was taken up into the tree and 82% of the perchlorate taken up was accumulated in the leaves. The plant contribution to total perchlorate removal in nonbioaugmented LOC soil was 39%, with the balance of the removal being attributed to microbial reduction. In bioaugmented soil the microbial contribution to perchlorate removal was increased. Just planting poplar trees decreased the diversity of perchlorate reducers in the soil. However, when LOC soil was both planted and bioaugmented, the diversity of perchlorate reducers was not decreased. In HOC soil, the presence of an indigenous population of microorganisms competed with perchlorate reducers. At the increased ORP observed in planted HOC soil, the non-perchlorate-reducing bacteria appear to outcompete the perchlorate reducers and perchlorate removal is decreased. Engineering implications of this research are that perchlorate remediation in HOC soil does not benefit from planting hybrid poplar trees but that remediation in LOC soil is stimulated by planting and bioaugmentation.
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Sakhatska, I. M. "Study of medicinal plants with sedative effect". Thesis, БДМУ, 2021. http://dspace.bsmu.edu.ua:8080/xmlui/handle/123456789/18909.

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Chakauya, Ereck. "Effect of manipulating pantothenate biosynthesis in higher plants". Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614866.

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Voss, Joshua. "Forage adaptability trials for forage and seed production in Bolivia : effect of 5 herbicides on 7 native Utah forbs /". Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1639.pdf.

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Wang, Ding Xiang. "Interaction between the effects of sodium chloride and high temperature on the vegetative growth of tomato (Lycopersicon esculentum Mill.)". Title page, contents and summary only, 1993. http://web4.library.adelaide.edu.au/theses/09PH/09phw2456.pdf.

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Sangwan, Veena. "Temperature sensing in plants". Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37831.

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It is now well established that cold-triggered calcium influx mediates cold-induced gene expression and development of freezing tolerance (cold acclimation). In this thesis, cold signaling events both upstream and downstream of calcium influx were examined.
First, it was shown that the studies on calcium mediation of cold acclimation in alfalfa cell suspension cultures could be applied to intact seedlings of Arabidopsis. Calcium chelators and channel blockers caused a strong reduction in the cold-induced accumulation of kin1 and kin2 transcripts, suggesting that calcium influx was an essential event during cold signaling and that the source of calcium for this influx was largely the calcium-rich cell wall. Evidence suggesting the involvement of calcium-dependent protein kinases (CDPKs) was also obtained.
Second, the nature of events upstream of calcium influx was explored. For this study, transgenic Brassica napus seedlings possessing both the endogenous cold-inducible BN115 gene and the coding part of beta-glucuronidase (GUS) gene placed under the control of the BN115 promoter were used. Thus cold-activation of the BN115 promoter drove the expression of both BN115 at the transcriptional level and the GUS enzyme activity at the translational level. Cold-activation of BN115 was inhibited by chemicals which cause membrane fluidization, cytoskeletal stabilization and inhibition of Ca2+ influx, and mimicked at 25°C by chemicals causing membrane rigidification, cytoskeletal destabilization and Ca2+ influx. Inhibitors of protein and lipid kinases prevented cold-activation of BN115, but inhibition of protein phosphatases activated BN115 at 25°C.
Third, given the increasing importance of mitogen-activated protein kinases (MAPKs) in signal transduction, the nature of molecular mechanisms that lead to cold-activation of a previously reported MAPK, SAMK, was investigated. During this study, the first plant MAPK activated by heat shock was discovered and named HAMK (Heat-shock-activated MAPK). It was shown that cold-activation of SAMK is mediated by cold-induced membrane rigidification, whereas the heat shock-activation of HAMK occurs through heat shock-induced membrane fluidization. Whereas activation of both SAMK and HAMK is blocked by an actin microfilament stabilizer, it is mimicked at 25°C by chemical destabilizers of microtubules or actin microfilaments. All of these events are inhibited by blocking the influx of extracellular Ca 2+. Cold-activation of SAMK and heat-activation of HAMK was prevented by treatment of cells with inhibitors of CDPKs. Thus, cold and heat shock are sensed by structural changes in the plasma membrane, which transduces the signal via cytoskeletal rearrangements to the opening of calcium channels, leading to Ca2+ influx, activation of CDPKs and activation of distinct MAPK cascades.
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Gencoglu, Cihangir. "Assessment Of The Effect Of Hydroelectric Power Plants&#039". Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612165/index.pdf.

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The Turkish TSO (TEIAS) has been leading a project that aims the synchronous interconnected operation of the Turkish Power System and the ENTSO-E CESA (former UCTE) System. For this purpose, this study concentrates on the specific problems related to the electromechanical systems of large size hydroelectric power plants regarding low frequency inter area oscillations, which are prone to occur once the interconnected operation is established. The expected frequency of inter area oscillations after interconnected operation is close to 0.15 Hz, which is in the frequency range of the speed governing structures of turbines, as explained in the first two sections of the thesis. In the third section, the nonlinear turbine governor model used throughout the study is explained. In the following part, the governor parameter tuning study with regard to the defined performance objectives is explained. Afterwards, the effect of the retuned governor settings of the sample hydroelectric power plants on a simple multi machine power system is shown. Following that, the system wide effect of removing the sources of negative damping, which are strongly dependent on the governor settings of the major hydroelectric power plants of the Turkish Power System, is shown. In the final part, conclusions are made on the operation of the hydroelectric power plants regarding the frequency stability of the system after synchronous interconnected operation of the Turkish Power System and the ENTSO-E CESA System.
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Lau, Ka Keung. "Effect of O←3 fumigation on nitrate reduction in plants". Thesis, Lancaster University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337586.

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López-Chuken, Ulriko J. "The effect of chloro-complexation on cadmium uptake by plants". Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430615.

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Livros sobre o assunto "Effect of perchlorates on Plants"

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United States. Agency for Toxic Substances and Disease Registry. Division of Toxicology and Environmental Medicine, ed. Perchlorates. Atlanta, Ga: Agency for Toxic Substances and Disease Registry, Division of Toxicology and Environmental Medicine, Dept. of Health and Human Services, Public Health Service, 2008.

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United States. Agency for Toxic Substances and Disease Registry, ed. Toxicological profile for perchlorates. Atlanta, Ga: U.S. Department of Health and Human Services, Public Health Service, Agency for Toxic Substances and Disease Registry, 2008.

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United States. Agency for Toxic Substances and Disease Registry. Division of Toxicology and Environmental Medicine, ed. Percloratos. Atlanta, GA]: Agencia para Sustancias Tóxicas y el Registro de Enfermedades, División de la Toxicología y Medicina Ambiental, Departamento de Salud y Servicios Humanos de los EE.UU., Servicio de Salud Pública, 2008.

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National Academies Press (U.S.) e National Research Council (U.S.). Division on Earth and Life Studies., eds. Health implications of perchlorate ingestion. Washington, D.C: National Academies Press, 2005.

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P, Long S., Woodward F. I, Company of Biologists e Society for Experimental Biology (Great Britain), eds. Plants and temperature. Cambridge [England]: Company of Biologists, Ltd., Dept. of Zoology, University of Cambridge, 1988.

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European Conference on Chemistry and the Environment (2nd 1984 Lindau, Bavaria, Germany). Air pollution and plants. Deerfield Beach, FL, USA: VCH Publishers, 1985.

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Lolkema, Peter Cornelis. Copper resistance in higher plants. Amsterdam: Free University Press, 1985.

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1935-, Abrol Y. P., e Ahmad Altaf, eds. Sulphur in plants. Dordrecht: Kluwer Academic Publishers, 2003.

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Heinrich, Sandermann, ed. Molecular ecotoxicology of plants. Berlin: Springer, 2004.

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Frank, Katterman, e American Chemical Society, eds. Environmental injury to plants. San Diego: Academic Press, 1990.

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Capítulos de livros sobre o assunto "Effect of perchlorates on Plants"

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Khalid, Muhammad Fasih, Iqra Zakir, Rashid Iqbal Khan, Sobia Irum, Samreen Sabir, Nishat Zafar, Shakeel Ahmad, Mazhar Abbas, Talaat Ahmed e Sajjad Hussain. "Effect of Water Stress (Drought and Waterlogging) on Medicinal Plants". In Medicinal Plants, 169–82. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-5611-9_6.

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Srivastava, Kavita, Sachidanand Singh, Anupam Singh, Tanvi Jain, Rahul Datta e Abhidha Kohli. "Effect of Temperature (Cold and Hot) Stress on Medicinal Plants". In Medicinal Plants, 153–68. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-5611-9_5.

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Stadlober, Margit. "Tiny Plants (?) with Big Effect". In The Cultures of Entanglement, 307–24. Bielefeld, Germany: transcript Verlag, 2024. http://dx.doi.org/10.14361/9783839468050-023.

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Lindermayr, Christian, e Kim Henrik Hebelstrup. "Growth-Promoting Effect of NO Fumigation and Hemoglobins". In Gasotransmitters in Plants, 137–54. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40713-5_7.

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Hillis, W. E., e M. Sumimoto. "Effect of Extractives on Pulping". In Natural Products of Woody Plants, 880–920. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74075-6_23.

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Wang, Jinxiang, e Ruichi Pan. "Effect of Ethylene on Adventitious Root Formation". In Ethylene Action in Plants, 69–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/978-3-540-32846-9_4.

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Kaur, Harpreet, Renu Bhardwaj, Vinod Kumar, Anket Sharma, Ravinder Singh e Ashwani Kumar Thukral. "Effect of pesticides on leguminous plants". In Legumes under Environmental Stress, 91–101. Chichester, UK: John Wiley & Sons, Ltd, 2015. http://dx.doi.org/10.1002/9781118917091.ch6.

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Naeem, H. A., e F. MacRitchie. "Effect of Sulphur Nutrition on Agronomic and Quality Attributes of Wheat". In Sulphur in Plants, 305–22. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0289-8_17.

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Jan, Rahmatullah, Lubna, Sajjad Asaf, Muhammad Aaqil Khan e Kyung-Min Kim. "Effect of Mineral Nutrition and PGRs on Biosynthesis and Distribution of Secondary Plant Metabolites under Abiotic Stress". In Medicinal Plants, 287–314. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-5611-9_11.

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Pérez-Pastor, Alejandro, M. Carmen Ruiz-Sánchez e María R. Conesa. "Drought stress effect on woody tree yield". In Water Stress and Crop Plants, 356–74. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781119054450.ch22.

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Trabalhos de conferências sobre o assunto "Effect of perchlorates on Plants"

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Butler, A. D., C. C. Thomas, V. F. Medina e S. L. Larson. "The Effect of Plants on Lead Dissolution". In GeoFlorida 2010. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41095(365)277.

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Serag-Eldin, Mohamed A., e Mohammed A. Abdul Latif. "Magnus-Effect Rotors for Solar Chimney Power Plants". In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-31064.

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The paper proposes the use of spinning and rotating cylinders to replace the axial turbines of Solar Chimney power plants. A large number of circular cylinders are placed equidistant, on a circular track concentric with the solar chimney axis. The cylinders spin around their own axis while simultaneously rotating about the chimney axis. By virtue of the Magnus effect, Lift forces arise which create force components tangential to the track in the direction of motion of the cylinders; thus mechanical work is produced. Using CFD modeling, the paper analyzes the resulting flow pattern and presents the expected performance of the hypothetical design for different geometric parameters and operating conditions. It is demonstrated that the design is indeed promising, and worthy of further investigation and development. It is also revealed that good performance of the proposed rotor is highly dependent on the proper choice of operating parameters.
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Markova, Yu A., V. N. Nurminsky, I. S. Nesterkina, N. V. Ozolina, A. L. Tourskaya, V. A. Bybin, I. V. Klimenkov, L. A. Belovezovets e M. S. Tretyakova. "The effect of colchicine on microorganisms". In IX Congress of society physiologists of plants of Russia "Plant physiology is the basis for creating plants of the future". Kazan University Press, 2019. http://dx.doi.org/10.26907/978-5-00130-204-9-2019-279.

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Svistova, I. D., e N. M. Kuvshinova. "Phytosanitary effect of the plants – producers of sweet glycosides". In 2nd International Scientific Conference "Plants and Microbes: the Future of Biotechnology". PLAMIC2020 Organizing committee, 2020. http://dx.doi.org/10.28983/plamic2020.241.

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In the root zone of plants that accumulate sweet glycosides (honey stevia and naked licorice), a sharp decrease in the phytopathogenic potential of the soil was revealed without increasing its phytotoxic activity.
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Symochko, Lyudmyla, Ruslan Mariychuk, Olena Demyanyuk e Vitaliy Symochko. "Enrofloxacin in Agroecosystems: Uptake by Plants and Phytotoxical Effect". In 2019 International Council on Technologies of Environmental Protection (ICTEP). IEEE, 2019. http://dx.doi.org/10.1109/ictep48662.2019.8968989.

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Arifin, Zainal. "The effect of liquid NPK fertilizing on corn plants". In INTERNATIONAL CONFERENCE ON BIOLOGY AND APPLIED SCIENCE (ICOBAS). AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5115617.

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"Study on Humidification and Cooling Effect of Garden Plants". In 2018 4th International Conference on Education, Management and Information Technology. Francis Academic Press, 2018. http://dx.doi.org/10.25236/icemit.2018.262.

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Efimova, M. V. "The protective effect of brassinosteroids in chloride salinity". In IX Congress of society physiologists of plants of Russia "Plant physiology is the basis for creating plants of the future". Kazan University Press, 2019. http://dx.doi.org/10.26907/978-5-00130-204-9-2019-168.

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HENRIQUE CABRAL DETTMER, PAULO, CARLOS OLAVO SLOTA OVELAR, MARCELO LUIZ NORILLER, JOSE JUNJI OTA e CLAUDIONOR FERNANDES CHAVES. "Computational and Experimental Modeling of Ejection Effect in Hydroelectric Plants". In 38th IAHR World Congress. The International Association for Hydro-Environment Engineering and Research (IAHR), 2019. http://dx.doi.org/10.3850/38wc092019-0379.

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Dubova, L., B. Limane, O. Muter, A. Versilovskis, Dz Zarina e I. Alsina. "Effect of nitroaromatic compounds on the growth of potted plants". In Proceedings of the II International Conference on Environmental, Industrial and Applied Microbiology (BioMicroWorld2007). WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789812837554_0005.

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Relatórios de organizações sobre o assunto "Effect of perchlorates on Plants"

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Kirova, Elisaveta. Effect of Nitrogen Nutrition Source on Antioxidant Defense System of Soybean Plants Subjected to Salt Stress. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, fevereiro de 2020. http://dx.doi.org/10.7546/crabs.2020.02.09.

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García Victoria, Nieves, Esteban Baeza Romero, Geert Franken, Silke Hemming e Gert Vletter. Effect of high scattering lamellae on growthand photosynthesis of young tomato plants : smart materials crop experiments. Bleiswijk: Stichting Wageningen Research, Wageningen Plant Research, Business Unit Greenhouse Horticulture, 2020. http://dx.doi.org/10.18174/564877.

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Palukaitis, Peter, Amit Gal-On, Milton Zaitlin e Victor Gaba. Virus Synergy in Transgenic Plants. United States Department of Agriculture, março de 2000. http://dx.doi.org/10.32747/2000.7573074.bard.

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Transgenic plants expressing viral genes offer novel means of engendering resistance to those viruses. However, some viruses interact synergistically with other viruses and it is now known that transgenic plants expressing particular genes of one virus may also mediate synergy with a second virus. Thus, our specific objectives were to (1) determine if transgenic plants resistant to one virus showed synergy with another virus; (2) determine what viral sequences were essential for synergy; and (3) determine whether one of more mechanisms were involved i synergy. This project would also enable an evaluation of the risks of synergism associated with the use of such transgenic plants. The conclusion deriving from this project are as follows: - There is more than one mechanism of synergy. - The CMV 2b gene is required for synergistic interactions. - Synergy between a potyvirus and CMV can break natural resistance limiting CMV movement. - Synergy operates at two levels - increase in virus accumulation and increase in pathology - independently of each other. - Various sequences of CMV can interact with the host to alter pathogenicity and affect virus accumulation. - The effect of synergy on CMV satellite RNA accumulatio varies in different systems. - The HC-Pro gene may only function in host plant species to induce synergy. - The HC-Pro is a host range determinant of potyviruses. - Transgenic plants expressing some viral sequences showed synergy with one or more viruses. Transgenic plants expressing CMV RNA 1, PVY NIb and the TMV 30K gene all showed synergy with at least one unrelated virus. - Transgenic plants expressing some viral sequences showed interference with the infection of unrelated viruses. Transgenic plants expressing the TMV 30K, 54K and 126K genes, the PVY NIb gene, or the CMV 3a gene all showed some level of interference with the accumulation (and in some cases the pathology) of unrelated viruses. From our observations, there are agricultural implications to the above conclusions. It is apparent that before they are released commercially, transgenic plants expressing viral sequences for resistance to one virus need to be evaluated fro two properties: - Synergism to unrelated viruses that infect the same plant. Most of these evaluations can be made in the greenhouse, and many can be predicted from the known literature of viruses known to interact with each other. In other cases, where transgenic plants are being generated from new plant species, the main corresponding viruses from the same known interacting genera (e.g., potexviruses and cucumoviruses, potyviruses and cucumoviruses, tobamoviruses and potexviruses, etc.) should be evaluated. - Inhibition or enhancement of other resistance genes. Although it is unlikely that plants to be released would be transformed with HC-Pro or 2b genes, there may be other viral genes that can affect the expression of plant genes encoding resistance to other pathogens. Therefore, transgenic plants expressing viral genes to engender pathogen-derived resistance should be evaluated against a spectrum of other pathogens, to determine whether those resistance activities are still present, have been lost, or have been enhanced!
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Mudge, Christopher R., Kurt D. Getsinger e Benjamin P. Sperry. Simulated Herbicide Spray Retention on Floating Aquatic Plants as Affected by Carrier Volume and Adjuvant Type. U.S. Army Engineer Research and Development Center, junho de 2022. http://dx.doi.org/10.21079/11681/44540.

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Foliar delivery of herbicides is a common means for plant management in aquatic environments. Though this technique is decades old, little is known about vegetative spray retention relative to this application method. A more complete understanding of maximizing herbicide retention could lead to improved plant management while simultaneously decreasing pesticide load in aquatic environments. Therefore, outdoor mesocosm experiments were conducted in 2020 to evaluate the effect of adjuvant type on foliar spray retention in waterhyacinth [Eichhornia crassipes (Mart.) Solms]. Additionally, the effect of carrier volume on spray retention in waterhyacinth, waterlettuce (Pistia stratiotes L.), and giant salvinia (Salvinia molesta D.S. Mitchell) was documented. Spray deposition did not differ among the nine adjuvants tested; however, spray retention was reduced 6% to 11% when an adjuvant was excluded from the spray solution. The effect of carrier volume on spray retention in waterhyacinth, waterlettuce, and giant salvinia was also investigated. Decreases in spray retention were most sensitive to increased carrier volume in waterhyacinth, followed by giant salvinia and waterlettuce. Among species, spray retention potential, as determined by intercept estimates, was greatest in waterlettuce and giant salvinia regardless of carrier volume. Asymptotes estimates for waterhyacinth, waterlettuce, and giant salvinia were 33%, 46%, and 79% spray retention, respectively. In other words, spray retention was the lowest and remained relatively constant at these values for the high carrier volumes tested (935 and 1,870 L ha⁻¹), which were likely due to the presence of pubescence on leaves and flatter leaf architecture represented by waterlettuce and giant salvinia compared to the glabrous vertical leaves of waterhyacinth. Future research will evaluate these concepts under field condition.
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Valverde, Rodrigo A., Aviv Dombrovsky e Noa Sela. Interactions between Bell pepper endornavirus and acute viruses in bell pepper and effect to the host. United States Department of Agriculture, janeiro de 2014. http://dx.doi.org/10.32747/2014.7598166.bard.

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Based on the type of relationship with the host, plant viruses can be grouped as acute or persistent. Acute viruses are well studied and cause disease. In contrast, persistent viruses do not appear to affect the phenotype of the host. The genus Endornavirus contains persistent viruses that infect plants without causing visible symptoms. Infections by endornaviruses have been reported in many economically important crops, such as avocado, barley, common bean, melon, pepper, and rice. However, little is known about the effect they have on their plant hosts. The long term objective of the proposed project is to elucidate the nature of the symbiotic interaction between Bell pepper endornavirus (BPEV) and its host. The specific objectives include: a) to evaluate the phenotype and fruit yield of endornavirus-free and endornavirus-infected bell pepper near-isogenic lines under greenhouse conditions; b) to conduct gene expression studies using endornavirus-free and endornavirus-infected bell pepper near-isogenic lines; and c) to study the interactions between acute viruses, Cucumber mosaic virus Potato virus Y, Pepper yellow leaf curl virus, and Tobacco etch virus and Bell pepper endornavirus. It is likely that BPEV in bell pepper is in a mutualistic relationship with the plant and provide protection to unknown biotic or abiotic agents. Nevertheless, it is also possible that the endornavirus could interact synergistically with acute viruses and indirectly or directly cause harmful effects. In any case, the information that will be obtained with this investigation is relevant to BARD’s mission since it is related to the protection of plants against biotic stresses.
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Citovsky, Vitaly, e Yedidya Gafni. Nuclear Import of the Tomato Yellow Curl Leaf Virus in Tomato Plants. United States Department of Agriculture, setembro de 1994. http://dx.doi.org/10.32747/1994.7568765.bard.

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Tomato yellow leaf curl geminivirus (TYLCV) is a major pathogen of cultivated tomato, causing up to 100% crop loss in many parts of the world. In Israel the disease is well known and has an economic significance. In recent years viral symptoms were found in countries of the "New World" and since 1997, in Florida. Surprisingly, little is known about the molecular mechanisms of TYLCV interaction with the host plant cells. This proposal was aimed at expanding our understanding of the molecular mechanisms by which TYLCV enters the host cell nucleus. The main objective was to elucidate the TYLCV protein(s) involved in transport of the viral genomic DNA into the host cell nucleus. This goal was best served by collaboration between our laboratories one of which (V.C.) was already investigating the nuclear import of the T-DNA ofAgrobacterium tumefaciens, and the other (Y.G.) was studying the effect of TYLCV capsid protein (CP) in transgenic plants, hypothesizing its involvement in the viral nuclear entry. Three years of our collaborative work have provided signifcant data that strongly support our original hypothesis of the involvement of TYLCtr CP in viral nuclear import. Furthermore, our results have laid a foundation to study fundamental, but as yet practically unresolved, questions about the role ofthe host cell factors in the nuclear import of geminiviruses within their host plant. As a result, this research may lead to development of new approaches for plant protection based on control of TYLCV import to the host plant cell nucleus.
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Farazi, Mena, Michael Houghton, Margaret Murray e Gary Williamson. Systematic review of the inhibitory effect of extracts from edible parts of nuts on α-glucosidase activity. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, agosto de 2022. http://dx.doi.org/10.37766/inplasy2022.8.0061.

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Review question / Objective: The aim of this review is to examine inhibitory effect of functional components in extracts from edible nuts on α-glucosidase activity. At the end of this review the following questions will be addressed by summarizing data of in-vitro studies: which nut extract has the strongest inhibitory effect? Which functional component (e.g. polyphenols) has the strongest inhibitory effect against α-glucosidase? Are there any differences between inhibition of α-glucosidase from different sources (e.g. yeast and mammalian)? Condition being studied: Any papers looking at inhibition of α-glucosidase activity (a carbohydrate digestive enzyme; includes sucrase, maltase and isomaltase activities) by extracts of edible parts of nut will be included in this review. Papers looking at other parts of nut plants and other enzymes will be excluded.
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Wolf, Shmuel, e William J. Lucas. Involvement of the TMV-MP in the Control of Carbon Metabolism and Partitioning in Transgenic Plants. United States Department of Agriculture, outubro de 1999. http://dx.doi.org/10.32747/1999.7570560.bard.

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The function of the 30-kilodalton movement protein (MP) of tobacco mosaic virus (TMV) is to facilitate cell-to-cell movement of viral progeny in infected plants. Our earlier findings have indicated that this protein has a direct effect on plasmodesmal function. In addition, these studies demonstrated that constitutive expression of the TMV MP gene (under the control of the CaMV 35S promoter) in transgenic tobacco plants significantly affects carbon metabolism in source leaves and alters the biomass distribution between the various plant organs. The long-term goal of the proposed research was to better understand the factors controlling carbon translocation in plants. The specific objectives were: A) To introduce into tobacco and potato plants a virally-encoded (TMV-MP) gene that affects plasmodesmal functioning and photosynthate partitioning under tissue-specific promoters. B) To introduce into tobacco and potato plants the TMV-MP gene under the control of promoters which are tightly repressed by the Tn10-encoded Tet repressor, to enable the expression of the protein by external application of tetracycline. C) To explore the mechanism by which the TMV-MP interacts with the endogenous control o~ carbon allocation. Data obtained in our previous project together with the results of this current study established that the TMV-MP has pleiotropic effects when expressed in transgenic tobacco plants. In addition to its ability to increase the plasmodesmal size exclusion limit, it alters carbohydrate metabolism in source leaves and dry matter partitioning between the various plant organs, Expression of the TMV-MP in various tissues of transgenic potato plants indicated that sugars and starch levels in source leaves are reduced below those of control plants when the TMV-MP is expressed in green tissue only. However, when the TMV-MP was expressed predominantly in PP and CC, sugar and starch levels were raised above those of control plants. Perhaps the most significant result obtained from experiments performed on transgenic potato plants was the discovery that the influence of the TMV-MP on carbohydrate allocation within source leaves was under developmental control and was exerted only during tuber development. The complexity of the mode by which the TMV-MP exerts its effect on the process of carbohydrate allocation was further demonstrated when transgenic tobacco plants were subjected to environmental stresses such as drought stress and nutrients deficiencies, Collectively, these studies indicated that the influence of the TMV-MP on carbon allocation L the result of protein-protein interaction within the source tissue. Based on these results, together with the findings that plasmodesmata potentiate the cell-to-cell trafficking of viral and endogenous proteins and nucleoproteins complexes, we developed the theme that at the whole plant level, the phloem serves as an information superhighway. Such a long-distance communication system may utilize a new class of signaling molecules (proteins and/or RNA) to co-ordinate photosynthesis and carbon/nitrogen metabolism in source leaves with the complex growth requirements of the plant under the prevailing environmental conditions. The discovery that expression of viral MP in plants can induce precise changes in carbon metabolism and photoassimilate allocation, now provide a conceptual foundation for future studies aimed at elucidating the communication network responsible for integrating photosynthetic productivity with resource allocation at the whole-plant level. Such information will surely provide an understanding of how plants coordinate the essential physiological functions performed by distantly-separated organs. Identification of the proteins involved in mediating and controlling cell-to-cell transport, especially at the companion cell-sieve element boundary, will provide an important first step towards achieving this goal.
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Seginer, Ido, Daniel H. Willits, Michael Raviv e Mary M. Peet. Transpirational Cooling of Greenhouse Crops. United States Department of Agriculture, março de 2000. http://dx.doi.org/10.32747/2000.7573072.bard.

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Background Transplanting vegetable seedlings to final spacing in the greenhouse is common practice. At the time of transplanting, the transpiring leaf area is a small fraction of the ground area and its cooling effect is rather limited. A preliminary modeling study suggested that if water supply from root to canopy is not limiting, a sparse crop could maintain about the same canopy temperature as a mature crop, at the expense of a considerably higher transpiration flux per leaf (and root) area. The objectives of this project were (1) to test the predictions of the model, (2) to select suitable cooling methods, and (3) to compare the drought resistance of differently prepared seedlings. Procedure Plants were grown in several configurations in high heat load environments, which were moderated by various environmental control methods. The difference between the three experimental locations was mainly in terms of scale, age of plants, and environmental control. Young potted plants were tested for a few days in small growth chambers at Technion and Newe Ya'ar. At NCSU, tomato plants of different ages and planting densities were compared over a whole growing season under conditions similar to commercial greenhouses. Results Effect of spacing: Densely spaced plants transpired less per plant and more per unit ground area than sparsely spaced plants. The canopy temperature of the densely spaced plants was lower. Air temperature was lower and humidity higher in the compartments with the densely spaced plants. The difference between species is mainly in the canopy-to-air Bowen ratio, which is positive for pepper and negative for tomato. Effect of cooling methods: Ventilation and evaporative pad cooling were found to be effective and synergitic. Air mixing turned out to be very ineffective, indicating that the canopy-to-air transfer coefficient is not the limiting factor in the ventilation process. Shading and misting, both affecting the leaf temperature directly, proved to be very effective canopy cooling methods. However, in view of their side effects, they should only be considered as emergency measures. On-line measures of stress: Chlorophyll fluorescence was shown to accurately predict photosynthesis. This is potentially useful as a rapid, non-contact way of assessing canopy heat stress. Normalized canopy temperature and transpiration rate were shown to correlate with water stress. Drought resistance of seedlings: Comparison between normal seedlings and partially defoliated ones, all subjected to prolonged drought, indicated that removing about half of the lowermost leaves prior to transplanting, may facilitate adjustment to the more stressful conditions in the greenhouse. Implications The results of this experimental study may lead to: (1) An improved model for a sparse canopy in a greenhouse. (2) A better ventilation design procedure utilizing improved estimates of the evaporation coefficient for different species and plant configurations. (3) A test for the stress resistance of transplants.
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Granot, David, Scott Holaday e Randy D. Allen. Enhancing Cotton Fiber Elongation and Cellulose Synthesis by Manipulating Fructokinase Activity. United States Department of Agriculture, 2008. http://dx.doi.org/10.32747/2008.7613878.bard.

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a. Objectives (a) Identification and characterization of the cotton fiber FRKs; (b) Generating transgenic cotton plants overproducing either substrate inhibited tomato FRK or tomato FRK without substrate inhibition; (c) Generating transgenic cotton plants with RNAi suppression of fiber expressed FRKs; (d) Generating Arabidopsis plants that over express FRK1, FRK2, or both genes, as additional means to assess the contribution of FRK to cellulose synthesis and biomass production. b. Background to the topic: Cellulose synthesis and fiber elongation are dependent on sugar metabolism. Previous results suggested that FRKs (fructokinase enzymes that specifically phosphorylate fructose) are major players in sugar metabolism and cellulose synthesis. We therefore hypothesized that increasing fructose phosphorylation may enhance fiber elongation and cellulose synthesis in cotton plants. Accordinlgy, the objectives of this research were: c. Major conclusions and achievements: Two cotton FRKs expressed in fibers, GhFRK2 and GhFRK3, were cloned and characterized. We found that GhFRK2 enzyme is located in the cytosol and GhFRK3 is located within plastids. Both enzymes enable growth on fructose (but not on glucose) of hexose kinase deficient yeast strain, confirming the fructokinase activity of the cloned genes. RNAi constructs with each gene were prepared and sent to the US collaborator to generate cotton plants with RNAi suppression of these genes. To examine the effect of FRKs using Arabidopsis plants we generated transgenic plants expressing either LeFRK1 or LeFRK2 at high level. No visible phenotype has been observed. Yet, plants expressing both genes simultaneously are being created and will be tested. To test our hypothesis that increasing fructose phosphorylation may enhance fiber cellulose synthesis, we generated twenty independent transgenic cotton plant lines overexpressing Lycopersicon (Le) FRK1. Transgene expression was high in leaves and moderate in developing fiber, but enhanced FRK activity in fibers was inconsistent between experiments. Some lines exhibited a 9-11% enhancement of fiber length or strength, but only one line tested had consistent improvement in fiber strength that correlated with elevated FRK activity in the fibers. However, in one experiment, seed cotton mass was improved in all transgenic lines and correlated with enhanced FRK activity in fibers. When greenhouse plants were subjected to severe drought during flowering and boll development, no genotypic differences in fiber quality were noted. Seed cotton mass was improved for two transgenic lines but did not correlate with fiber FRK activity. We conclude that LeFRK1 over-expression in fibers has only a small effect on fiber quality, and any positive effects depend on optimum conditions. The improvement in productivity for greenhouse plants may have been due to better structural development of the water-conducting tissue (xylem) of the stem, since stem diameters were larger for some lines and the activity of FRK in the outer xylem greater than observed for wild-type plants. We are testing this idea and developing other transgenic cotton plants to understand the roles of FRK in fiber and xylem development. We see the potential to develop a cotton plant with improved stem strength and productivity under drought for windy, semi-arid regions where cotton is grown. d. Implications, scientific and agricultural: FRKs are probably bottle neck enzymes for biomass and wood synthesis and their increased expression has the potential to enhance wood and biomass production, not only in cotton plants but also in other feed and energy renewable plants.
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