Water deficiency at different developmental stages of Glycine max can improve drought tolerance

Kron, Alan Panaia; Souza, Gustavo Maia; Ribeiro, Rafael Vasconcelos

doi:10.1590/s0006-87052008000100005

Cited by 57 publications

(38 citation statements)

References 23 publications

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“…Reduction in the efficiency of RuBisCo may be caused by an increase in mesophyllic resistance due to stomatal closure, constraining CO 2 uptake into chloroplasts and increasing the oxygenase activity of RuBisCo, with a consequent increase in photorespiration. Moreover, ribulose-1, 5-bisphosphate regeneration may also be reduced by drought due to a decrease in ATP synthesis by ATPase (Kron et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

Soybean physiology and gene expression during drought

Stolf-Moreira¹,

Medri²,

Neumaier³

et al. 2010

Genet. Mol. Res.

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ABSTRACT. Soybean genotypes MG/BR46 (Conquista) and BR16, drought-tolerant and -sensitive, respectively, were compared in terms of morphophysiological and gene-expression responses to water stress during two stages of development. Gene-expression analysis showed differential responses in Gmdreb1a and Gmpip1b mRNA expression within 30 days of water-deficit initiation in MG/BR46 (Conquista) plants. Within 45 days of initiating stress, Gmp5cs and Gmpip1b had relatively higher expression. Initially, BR16 showed increased expression only for Gmdreb1a, and later (45 days) for Gmp5cs, Gmdefensin and Gmpip1b. Only BR16 presented down-regulated expression of genes, such as Gmp5cs and Gmpip1b, 30 days after the onset of moisture stress, and Gmgols after 45 days of stress. The faster perception of water stress in MG/BR46 (Conquista) and the better maintenance of up-regulated gene expression than in the sensitive BR16 genotype imply mechanisms by which the former is better adapted to tolerate moisture deficiency.

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Section: Resultsmentioning

confidence: 99%

Soybean physiology and gene expression during drought

Stolf-Moreira¹,

Medri²,

Neumaier³

et al. 2010

Genet. Mol. Res.

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“…Segundo Taiz e Zeiger (2009), de modo geral, plantas submetidas ao déficit hídrico apresentam decréscimo da produção da área foliar, induzindo o fechamento dos estômatos, da aceleração da senescência e da abscisão das folhas. Quando as plantas são expostas, frequentemente, a esta condição, ocorre conservação da água no solo, como se estivessem economizando para períodos futuro (KRON et al, 2008).…”

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Desenvolvimento e produção de capim-convert HD364 submetido ao estresse hídrico.

Bonfim-Silva¹,

Silva²,

Schlichting³

et al. 2014

AGRO@MBIENTE

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Resumo -A inserção de novas cultivares ou híbridos de capim no mercado geram expectativas aos pecuaristas, como novas opções para instalação e manutenção de pastos. Sob essas expectativas está o híbrido capim-convert HD364, que foi recentemente lançado no mercado brasileiro. Assim, objetivou avaliar o desenvolvimento e produção de capim-convert HD364 submetido ao estresse hídrico. O experimento foi realizado em casa de vegetação em delineamento experimental inteiramente casualizado. Foram utilizados vasos com 2,5 dm 3 de solo e seis disponibilidades hídricas: 20, 40, 60, 80, 100 e 120% da capacidade máxima de retenção de água no solo, com quatro repetições. A umidade do solo foi mantida pelo método gravimétrico. Foram avaliados altura de plantas; número de folhas, número de perfilhos e índice SPAD (Soil Plant Analysis Development) e o corte das plantas foram realizados rente ao solo 23 dias após a aplicação dos tratamentos para avaliar a massa seca da parte aérea e massa seca de raízes. Todos os resultados foram submetidos a análises de variância e teste de regressão até 5% de probabilidade por meio do programa SISVAR. As disponibilidades hídricas que proporcionam melhor desenvolvimento e produções da gramínea forrageira situaram-se no intervalo entre 78,2 a 92,49% da capacidade máxima retenção de água do solo. O desenvolvimento e produção do capim-convert HD364 é mais prejudicado pelo estresse hídrico por déficit de água (20% da capacidade máxima retenção de água do solo) que por condições de alagamento. Palavras-chave -Alagamento. Disponibilidade hídrica. Forrageira híbrida.Abstract -The introduction of new cultivars or hybrids of grass generate expectations in the market for farmers, and new options for installation and maintenance of pastures. Under these expectations is grass-convert HD364 the hybrid that was recently released in Brazil. This work aimed to evaluate the development and production of grass-convert HD364 subjected to water stress. The experiment was conducted in a greenhouse experimental design, completely randomized in a 2,5 dm 3 pots with soil water availability and six: 20, 40, 60, 80, 100 and 120% retention with capacity of the soil water four replications. Soil moisture was maintained by the gravimetric method. It was evaluated plant height, number of leaves and SPAD index (Soil Plant Analysis Development) and cutting plants at ground level were performed 23 days after treatment application to evaluate the dry mass of shoot and root dry matter. All results were submitted to analysis of variance and regression test at 5% probability through the program SISVAR. Water availability to provide best development and production of grass stood in the range of 78.2 to 92.49% of the maximum water holding capacity of the soil. The development and production of grass-convert HD364 is most affected by water stress and water deficit (20% of maximum water holding capacity of the soil) than by flooding conditions.

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“…These results also suggest that there might have occurred an increase in water use efficiency by the plants, because, under moderate deficiency, soybean plants tend to show only partial reduction in stomatal opening and it limits transpiration more strongly than the entry of CO 2 (Kron et al, 2008). Additionally, plants reduced their growth due to the water deficit (Table 5); according to Kron et al (2008), it is a mechanism of tolerance to the lack of water and may be considered as a strategy of energy conservation, which probably contributed to make plants more efficient in the production stage, when water conditions were more favorable.…”

Section: Resultsmentioning

confidence: 81%

“…Additionally, plants reduced their growth due to the water deficit (Table 5); according to Kron et al (2008), it is a mechanism of tolerance to the lack of water and may be considered as a strategy of energy conservation, which probably contributed to make plants more efficient in the production stage, when water conditions were more favorable.…”

Section: Resultsmentioning

confidence: 99%

Agronomic aspects of soybean plants subjected to deficit irrigation

Nunes

Bezerra

Silva

et al. 2016

Rev. bras. eng. agríc. ambient.

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This study aimed to evaluate the behavior of soybean plants subjected to irrigation management with controlled water deficits in different phenological stages. The research was conducted in an experimental area of the Federal University of Tocantins (UFT), in Palmas-TO, Brazil. The experimental design was randomized blocks with four replicates, and treatments arranged in a split-plot scheme. The plots consisted of irrigation levels that induced plants to water deficit in the vegetative stage, reproductive stage and throughout the entire cycle, based on potential crop evapotranspiration (ETpc). The subplots corresponded to two soybean cultivars (M9144RR and TMG1288RR). The following agronomic variables were evaluated: days until flowering, days until maturation, plant height, first pod height, number of pods per plant, stem diameter, leaf area and yield. Irrigation management with moderate water deficit, 50% of ETpc, in the vegetative stage, promoted the best agronomic characteristics and contributed to increase the yield of the evaluated soybean cultivars, especially M9144RR.

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Water deficiency at different developmental stages of Glycine max can improve drought tolerance

Cited by 57 publications

References 23 publications

Soybean physiology and gene expression during drought

Soybean physiology and gene expression during drought

Desenvolvimento e produção de capim-convert HD364 submetido ao estresse hídrico.

Agronomic aspects of soybean plants subjected to deficit irrigation

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