Drought Tolerance
Mostrando 25-36 de 157 artigos, teses e dissertações.
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25. Water restriction and physiological traits in soybean genotypes contrasting for nitrogen fixation drought tolerance
ABSTRACT Biological nitrogen fixation (BNF) is essential to the economic viability of the soybean [Glycine max (L.) Merrill] crop in Brazil, but drought may impair the BNF processes. We evaluated physiological traits of nitrogen fixation drought-tolerant (NFDT) (R01-581F, R01-416F and R02-1325) and drought-susceptible (CD 215 and BRS 317) genotypes of soybea
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-04
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26. Isolation and characterization of a promoter responsive to salt, osmotic and dehydration stresses in soybean
Abstract Drought stress is the main limiting factor of soybean yield. Currently, genetic engineering has been one important tool in the development of drought-tolerant cultivars. A widely used strategy is the fusion of genes that confer tolerance under the control of the CaMV35S constitutive promoter; however, stress-responsive promoters would constitute the
Genet. Mol. Biol.. Publicado em: 27/03/2017
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27. Rice genotypes for drought tolerance: morphological and transcriptional evaluation of auxin-related genes
ABSTRACT Drought stress affects crop quality and productivity. The challenge of increasing food availability for a growing worldwide demand relies on the development of tolerant cultivars that will need to be adapted to arid and semi-arid areas. In order to help the understanding of rice response to stress, the phenotypic response of 6 Brazilian rice cultiva
Bragantia. Publicado em: 29/09/2016
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28. Antioxidant responses of wheat plants under stress
Abstract Currently, food security depends on the increased production of cereals such as wheat (Triticum aestivum L.), which is an important source of calories and protein for humans. However, cells of the crop have suffered from the accumulation of reactive oxygen species (ROS), which can cause severe oxidative damage to the plants, due to environmental str
Genet. Mol. Biol.. Publicado em: 2016-03
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29. Ecophysiological leaf traits of native and exotic palm tree species under semi-arid conditions
ABSTRACT The main goal of this study was to evaluate the performance of two palm species under semi-arid conditions during the rainy and dry periods: the semi-arid native Syagrus coronata and a native to tropical America, Acrocomia aculeata. The leaf water potential, gas exchange, leaf soluble sugars, starch, free amino acids, total soluble protein content a
Bragantia. Publicado em: 26/02/2016
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30. Expression profiles of sugarcane under drought conditions: Variation in gene regulation
Abstract Drought is a major factor in decreased sugarcane productivity because of the resulting morphophysiological effects that it causes. Gene expression studies that have examined the influence of water stress in sugarcane have yielded divergent results, indicating the absence of a fixed pattern of changes in gene expression. In this work, we investigated
Genet. Mol. Biol.. Publicado em: 03/11/2015
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31. Can the critical temperature for photochemical damage in common bean plants be changed after a drought event?
Low water availability and high temperatures occur under field conditions and we hypothesize that the critical temperature for photochemical damage (TC) in common bean (Phaseolus vulgaris L.) plants is increased by the occurrence of previous water deficit in a genotype-dependent manner. Five common bean cultivars A320, A222, Carioca, BAT477 and Ouro Negro we
Bragantia. Publicado em: 21/08/2015
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32. Galactinol synthase transcriptional profile in two genotypes of Coffea canephora with contrasting tolerance to drought
Increased synthesis of galactinol and raffinose family oligosaccharides (RFOs) has been reported in vegetative tissues in response to a range of abiotic stresses. In this work, we evaluated the transcriptional profile of a Coffea canephora galactinol synthase gene (CcGolS1) in two clones that differed in tolerance to water deficit in order to assess the cont
Genet. Mol. Biol.. Publicado em: 2015-06
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33. High grain quality accessions within a maize drought tolerant core collection
Maize (Zea mays L.) landraces are an important source of genes for improving commercial germplasm. Today, drought tolerance and grain quality are major challenges in maize cultivation due to climatic changes and population growth. The Maize Research Institute genebank has a drought tolerant collection, which includes 13 landraces (from the former Yugoslavia)
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-10
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34. Physiological limitations in two sugarcane varieties under water suppression and after recovering
Increasing water scarcity and depleted water productivity in irrigated soils are inducing farmers to adopt improved varieties, such as those with high-capacity tolerance. The use of tolerant varieties of sugarcane might substantially avoid the decline of productivity under water deficit. This research aimed to evaluate the harmful effects of drought on the p
Theor. Exp. Plant Physiol.. Publicado em: 2013
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35. Brassinosteroid analogue affects the senescence in two papaya genotypes submitted to drought stress
Brassinosteroids (BS) application is associated with the increase of tolerance to some kinds of stresses, such as those induced by the infection of pathogens, temperature, salt and water deficiency. In this work, the influence of a spirostanic analogue of brassinosteroid (SAB) in the leaves of papaya Golden and UENF/CALIMAN 01 (UC 01) was tested to evaluate
Theor. Exp. Plant Physiol.. Publicado em: 2013
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36. Introduction of the rd29A: AtDREB2A CA gene into soybean (Glycine max L. Merril) and its molecular characterization in leaves and roots during dehydration
The loss of soybean yield to Brazilian producers because of a water deficit in the 2011-2012 season was 12.9%. To reduce such losses, molecular biology techniques, including plant transformation, can be used to insert genes of interest into conventional soybean cultivars to produce lines that are more tolerant to drought. The abscisic acid (ABA)-independent
Genet. Mol. Biol.. Publicado em: 2013