Artigos científicos, teses e dissertações
Publicados nas melhores instituições de ensino

Water-deficit tolerant classification in mutant lines of indica rice

Water shortage is a major abiotic stress for crop production worldwide, limiting the productivity of crop species, especially in dry-land agricultural areas. This investigation aimed to classify the water-deficit tolerance in mutant rice (Oryza sativa L. spp. indica) genotypes du...

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Water deficit modifies the carbon isotopic composition of lipids, soluble sugars and leaves of Copaifera langsdorffii Desf. (Fabaceae)

ABSTRACT Water deficit is most frequent in forest physiognomies subjected to climate change. As a consequence, several tree species alter tissue water potential, gas exchange and production of carbon compounds to overcome damage caused by water deficiency. The working hypothesis,...

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Does the Introgression of Bt Gene Affect Physiological Cotton Response to Water Deficit?

RESUMO: O déficit hídrico pode afetar a expressão de proteínas que promovem o controle de lepidópteras no algodoeiro. Entretanto, não é conhecida a resposta de cultivares de algodão Bt e convencionais ao déficit hídrico, o que poderia afetar o potencial de competição com plantas ...

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WATER RELATIONS AT THE INITIAL SUGARCANE GROWTH PHASE UNDER VARIABLE WATER DEFICIT

ABSTRACT This study aimed to quantify water deficit levels that compromise sugarcane initial growth exposed to different availability soil depths. The experiment was conducted in a greenhouse by using 100-liter capacity asbestos-cement boxes filled with different soil layers simu...

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WATER-RETAINING POLYMER MITIGATES THE WATER DEFICIT IN Schinus terebinthifolia: PHOTOSYNTHETIC METABOLISM AND INITIAL GROWTH

ABSTRACT The use of water-retaining polymer (hydrogel) can mitigate the damage to the photosynthetic apparatus and increase the robustness of young plants under water deficit conditions. Thus, the aim of this study was to evaluate the effect of water-retaining polymer on the morp...

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Differential expression of the genes involved in responses to water-deficit stress in peach trees cv. Chimarrita grafted onto two different rootstocks

ABSTRACT Water deficit is responsible for a negative impact on agricultural systems. Several physiological, biochemical, and molecular processes are initiated as a response to water-deficit stress. Quantifying the differential expression of the genes involved in the response to w...

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Effect of Leaf Water Deficit on Stomatal and Nonstomatal Regulation of Net Carbon Dioxide Assimilation 1

The effect of leaf water deficit on net CO2 assimilation was studied under two conditions: in one, the stomata were allowed to contribute to the regulation of CO2 assimilation; in the other, air was forced through the leaf at a constant rate to overcome the effects of change in s...

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Physiological response and productivity of safflower lines under water deficit and rehydration

ABSTRACT Water deficit is one of the major stresses affecting plant growth and productivity worldwide. Plants induce various morphological, physiological, biochemical and molecular changes to adapt to the changing environment. Safflower (Carthamus tinctorius L.), a potential oil ...

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Water Deficit Rapidly Stimulates the Activity of a Protein Kinase in the Elongation Zone of the Maize Primary Root.

The mechanisms by which plants detect water deficit and transduce that signal into adaptive responses is unknown. In maize (Zea mays L.) seedlings, primary roots adapt to low water potentials such that substantial rates of elongation continue when shoot growth is completely inhib...

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Transpiration and leaf growth of potato clones in response to soil water deficit

Potato (Solanum tuberosum ssp. Tuberosum) crop is particularly susceptible to water deficit because of its small and shallow root system. The fraction of transpirable soil water (FTSW) approach has been widely used in the evaluation of plant responses to water deficit in differen...

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Water Deficit and Associated Changes in Some Photosynthetic Parameters in Leaves of `Valencia' Orange (Citrus sinensis [L.] Osbeck)

Photosynthetic CO2 assimilation, transpiration, ribulose-1,5-bisphosphate carboxylase (RuBPCase), and soluble protein were reduced in leaves of water-deficit (stress) `Valencia' orange (Citrus sinensis [L.] Osbeck). Maximum photosynthetic CO2 assimilation and transpiration, which...

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Modelagem técnica e econômica da irrigação deficitária para diferentes métodos de aplicação de água na cultura do milho

The deficit irrigation is often required to overcome periods of drought and limited water availability. To reduce the impacts on production, water deficits need to be applied during less sensitive stages of crop development. However, to select the appropriate irrigation managemen...

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Modelagem técnica e econômica da irrigação deficitária para diferentes métodos de aplicação de água na cultura do milho

The deficit irrigation is often required to overcome periods of drought and limited water availability. To reduce the impacts on production, water deficits need to be applied during less sensitive stages of crop development. However, to select the appropriate irrigation managemen...

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Deficiência hídrica e aplicação de ABA sobre as trocas gasosas e o acúmulo de flavonóides em calêndula (Calendula officinalis L.) / Water deficit and ABA application on leaf gas exchange and flavonoid content in marigold (Calendula officinalis L.)

It was evaluated the effects of water deficit and abscisic acid (ABA) application on some physiological parameters and flavonoid production in marigold plants. It was tested four intervals of withholding water (control - diary irrigation, 3, 6 and 9 days without irrigation) accom...

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Oxidative Damage in Pea Plants Exposed to Water Deficit or Paraquat1

The application of a moderate water deficit (water potential of −1.3 MPa) to pea (Pisum sativum L. cv Lincoln) leaves led to a 75% inhibition of photosynthesis and to increases in zeaxanthin, malondialdehyde, oxidized proteins, and mitochondrial, cytosolic, and chloroplastic supe...

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DEFICIT IRRIGATION OF SUBSURFACE DRIP-IRRIGATED GRAPE TOMATO

ABSTRACT Agriculture is one of the segments that most uses water and developments have been made to save irrigation water. Deficit irrigation is a technique that can contribute to production and water saving in agriculture. This study aimed to evaluate the viability of deficit ir...

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Estimation of climatological water deficit in an experimental watershed in the brazilian cerrado

ABSTRACT This study aimed to estimate the probability of climatological water deficit in an experimental watershed in the Cerrado biome, located in the central plateau of Brazil. For that, it was used a time series of 31 years (1982–2012). The probable climatological water defici...

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Tomato Plants Ectopically Expressing Arabidopsis CBF1 Show Enhanced Resistance to Water Deficit Stress1

A DNA cassette containing an Arabidopsis C repeat/dehydration-responsive element binding factor 1 (CBF1) cDNA and a nos terminator, driven by a cauliflower mosaic virus 35S promoter, was transformed into the tomato (Lycopersicon esculentum) genome. These transgenic tomato plants ...

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Biomass and nitrogen accumulation in white oat (Avena sativa L.) under water deficit

ABSTRACT Knowledge on nitrogen absorption rate by crops can indicate important managements, especially the definition of rates of this nutrient and the best time for topdressing application. This study aimed to evaluate and compare the accumulation of biomass and nitrogen in whit...

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Evaluation of recurrent selection families for tolerance to water deficit in common bean.

The objective of this work is to evaluate the adaptation to water deficit the families of recurrent selection CoS1:6 and CoS1:7, with carioca grain type of a base population obtained from a multiple crosses involving parents tolerant to water deficit....

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Abscisic Acid Content of Senescing Petals on Cut Rose Flowers As Affected by Sucrose and Water Stress 1

Leafless cut Superstar roses (Rosa hyb.) were kept in a 1% sucrose solution. During the first few days of treatment, the abscisic acid content and the water deficit in the petals was higher in treated flowers than in controls kept in water. Later and up to the termination of the ...

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