Tolerance to water deficiency between two soybean cultivars: transgenic versus conventional

Catuchi, Tiago Aranda; Vítolo, Hilton Fabrício; Bertolli, Suzana Chiari; Souza, Gustavo Maia

doi:10.1590/s0103-84782011000300002

Cited by 31 publications

(17 citation statements)

References 16 publications

(17 reference statements)

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“…Similarly to the apparent quantum efficiency, the light compensation point was increased in the plants maintained under drought stress, with emphasis on the non-irrigated control, which obtained a higher value, exceeding in 391.07 % the irrigated control. Corroborating the present results, the literature has demonstrated that soybean plants under drought stress present an increase in the light compensation point (Catuchi et al 2011). Larcher (2003 reports that the increase in the light compensation point indicates that the plant respiration overcame the drought stress conditions, what will result in a decrease of the plant production ( Figure 3) for the non-irrigated control.…”

Section: Resultssupporting

confidence: 89%

Mitigation of drought stress effects on soybean gas exchanges induced by Azospirillum brasilense and plant regulators

Bulegon

Guimarães

Battistus

et al. 2019

Pesqui. Agropecu. Trop.

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RESUMOgrain filling and accelerated senescence (Vieira et al. 2013). The soybean crop has a water demand that varies from 450 mm to 800 mm during its cycle, with a greater need between flowering and grain filling (Souza et al. 2016). In order to tolerate drought stress, the plants developed adaptive strategies to reduce losses in low water availability resulted by PALAVRAS-CHAVE: Glycine max L., fotossíntese, teor relativo de água.

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Section: Resultssupporting

confidence: 89%

Mitigation of drought stress effects on soybean gas exchanges induced by Azospirillum brasilense and plant regulators

Bulegon

Guimarães

Battistus

et al. 2019

Pesqui. Agropecu. Trop.

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“…A deficiência hídrica foi estabelecida durante um período de 25 dias, entre os estádios de desenvolvimento R1 (início do florescimento) e R5 (início do enchimento das sementes), com controle da irrigação realizado pelo método gravimétrico (Catuchi et al, 2011). Além do controle da reposição da irrigação, os níveis de umidade do solo foram monitorados por sensor de umidade e temperatura do solo, modelo EC-5 (Decagon Devices, Inc., Pullman, WA, EUA), acoplado a um leitor digital, modelo ECH 2 O Check.…”

Section: Methodsunclassified

Respostas fisiológicas de cultivares de soja à adubação potássica sob diferentes regimes hídricos

Catuchi

Guidorizzi

Guidorizi

et al. 2012

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a interferência da adubação potássica em parâmetros fisiológicos de duas cultivares de soja, sob diferentes regimes hídricos. O experimento foi realizado em condições de casa de vegetação, em Presidente Prudente, SP. Utilizou-se o delineamento experimental inteiramente casualizado, em arranjo fatorial 2x2x3, com as cultivares BR-16 (tolerante ao estresse hídrico) e Embrapa 48 (suscetível), regimes hídricos com reposição diária de água de 100% (controle) e de 40% da capacidade de campo, e três níveis de suplementação com K (0, 90 e 180 mg dm -3). Duas semanas após a imposição da restrição hídrica, foram avaliados: conteúdo relativo de água, potencial fotossintético e rendimento de biomassa. As plantas que se desenvolveram sob restrição hídrica tiveram sua capacidade fotossintética reavaliada após 12 horas de reidratação. Em condições de restrição hídrica, a adubação potássica não interferiu significativamente nos parâmetros fisiológicos e de crescimento avaliados. A suplementação com potássio promoveu melhor eficiência dos parâmetros fisiológicos, no regime sem deficiência hídrica, nas duas cultivares, e as principais variáveis influenciadas pelo nutriente foram: condutância estomática, taxa máxima de carboxilação da Rubisco e assimilação máxima de CO 2 . A suplementação com K melhora a recuperação fotossintética das plantas após a reidratação, especialmente na cultivar Embrapa 48.Termos para indexação: Glycine max, biomassa, deficit hídrico, fotossíntese, nutrição. Physiological responses of soybean cultivars to potassium fertilization under different water regimesAbstract -The objective of this work was to evaluate the interference of potassium fertilization on the physiological parameters of soybean cultivars under different water regimes. The experiment was carried out in greenhouse at Presidente Prudente, SP, Brazil. The experimental design was a completely randomized block in a 2x2x3 factorial arrangement, with the soybean cultivars BR-16 (tolerante ...) and Embrapa 48 (suscept...), water regimes with daily replacements of 100% (control) and 40% of the field capacity, and three levels of K supplementation (0, 90, and 180 mg dm -3). Relative water content, photosynthetic potential, and biomass yield were evaluated two weeks after the initiation of water restriction. Plants grown under water restriction had their photosynthetic potential reevaluated after 12 h of rehydration. Under water restriction conditions, potassium fertilization did not significantly affect the assessed growth and physiological parameters. Supplementation with potassium promoted a better efficiency of the physiological parameters, in water deficit control, in both cultivars, and the main variables influenced by the nutrient were: stomatal conductance, maximum rate of Rubisco carboxylation, and maximum CO 2 assimilation. Potassium supplementation improves photosynthetic recovery of plants after rehydration, especially in the Embrapa 48 cultivar.Index terms: Glycine max, biomass, water deficit...

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“…After 15 days of plant emergence, different water conditions were induced and pots were kept at 100% (control) or 30% of the evapotranspirated water (water stress). The daily control of evapotranspiration was carried out using the gravimetric method (Catuchi et al 2011). Soil moisture contents were monitored by humidity and temperature sensors (Prochek®; Decagon Devices, Pulman, WA, USA).…”

Section: Plant Materials and Growth Conditionsmentioning

confidence: 99%

Bacillus subtilis ameliorates water stress tolerance in maize and common bean

Lima

Moro

Pacheco

et al. 2019

Journal of Plant Interactions

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Water stress is one important abiotic stress with negative impacts on plant productivity. In order to ameliorate abiotic stress, plant growth-promoting rhizobacteria (PGPR), such as Bacillus subtilis, can be used due to their positive effects on plant physiology. The present study aimed to evaluate the effects of B. subtilis on the performance of maize and common bean under water deficit conditions. The study was performed in a plant growth chamber and the growth, gas exchange parameters and antioxidant activity were evaluated. B. subtilis promoted the growth of common bean and maize, and also increased the water use efficiency. The inoculation with B. subtilis increased leaf water content and the regulation of stomata, without damaging photosynthetic rates. Overall, B. subtilis decreased antioxidant activities in both plants. The results suggest that B. subtilis could be used as inoculants for common bean and maize to protect against water stress. ARTICLE HISTORY

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Tolerance to water deficiency between two soybean cultivars: transgenic versus conventional

Cited by 31 publications

References 16 publications

Mitigation of drought stress effects on soybean gas exchanges induced by Azospirillum brasilense and plant regulators

Mitigation of drought stress effects on soybean gas exchanges induced by Azospirillum brasilense and plant regulators

Respostas fisiológicas de cultivares de soja à adubação potássica sob diferentes regimes hídricos

Bacillus subtilis ameliorates water stress tolerance in maize and common bean

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