Restrição fotossintética de plantas de soja sob variação de disponibilidade hídrica

Chavarria, Geraldo; Durigon, Miria Rosa; Klein, Vilson Antônio; Kleber, Henrique

doi:10.1590/0103-8478cr20140705

Cited by 30 publications

(32 citation statements)

References 17 publications

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“…Associated with this, the water limitation results in a dynamic photoinhibition or protective photosynthesis by a limitation in the electron transport in the photosystem II, what leads to a decrease in the photosynthetic rate of short duration (Araújo & Deminicis 2009). Corroborating the present study, it is demonstrated that the drought stress reduces the photosynthetic rate of the plants in function of different levels of photosynthetic photon flux density (Chavarria et al 2015).…”

Section: Resultssupporting

confidence: 84%

“…Studies developed with soybean under drought stress conditions report that the maintenance of water content in leaves is essential for productivity (Fioreze et al 2011). Chavarria et al (2015) showed a reduction in the soybean photosynthetic capacity under drought stress, and this condition impacts negatively the crop yield (Naderi et al 2013, Farooq et al 2016.…”

Section: Introductionmentioning

confidence: 99%

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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: 84%

Section: Introductionmentioning

confidence: 99%

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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show abstract

“…Results found by Nascimento et al (2011) in jatobá (Hymenaea courbaril L.) there was a reduction of 31.0% in relation to the plants grown with 100% CC. However, when the water deficit develops in the field, in a slower way, it can impair the vegetative growth since under potting conditions there is limitation to the root growth (CHAVARRIA et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Morphophysiological evaluation of Bauhinia divaricata L. (Fabaceae) plants at different water regimes

Alves¹,

Albuquerque²,

Pereira³

et al. 2018

Biosci. J.

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The pata-de-vaca (Bauhinia divaricata L.) tree is a species widely distributed in Brazil, it has a high ornamental and economic value. Its leaves are used in renal inflammations, such as diuretic, hypoglycemic, being considered a medicinal plant of popular use. The research was carried out in a greenhouse belonging to the Laboratório de Ecologia Vegetal, at the Centro de Ciências Agrárias (CCA), from Universidade Federal of Paraíba (UFPB). The objective was to evaluate the morphophysiological characteristics of B. divaricata plants at different water regimes. The experimental design was completely randomized with five water treatments 1 (100% control), 2 (80%), 3 (60%), 4 (40%) and 5 (20%) of the container capacity. The height, number of leaves and stem diameter were evaluated weekly. At the end of the experiment the plants had their organs separated and taken to the greenhouse to obtain the dry matter of the leaves, stem, roots and total dry matter, and also, biomass allocation in the leaves, stem and roots. Plant height did not differ statistically between the treatments. The number of leaves, diameter, leaf, stem and root allocation and root and shoot dry matter were higher under water availability (100% of container capacity). For the production of B. divaricata L. seedlings water regime should be 100% and 80% of the container capacity, but the seedlings grow satisfactorily. 122 Morphophysiological evaluation… ALVES, M. M. et al. Biosci. J., Uberlândia, v. 34, supplement 1, p. 120-130, Dec. 2018 ALVES, M. M. et al. Biosci. J., Uberlândia, v. 34, supplement 1, p. 120-130, Dec. 2018 diferentes regimes hídricos. O delineamento experimental foi inteiramente casualizado com cinco tratamentos hídrico 100%, 80%, 60%, 40% e 20% da capacidade de pote. Avaliou-se, semanalmente a altura, número de folhas e diâmetro do caule. Ao final do experimento as plantas tiveram seus órgãos separados e levados à estufa para obtenção da matéria seca das folhas, caule, raízes e massa seca total, e ainda, alocação de biomassa nas folhas, caule e raízes. A altura de plantas não diferiu estatisticamente entre os tratamentos, o número de folhas, diâmetro, alocação de folhas, caules e raízes e massas seca da raiz e parte aérea foram maiores sob maior disponibilidade de água (100% da capacidade do recipiente). Para a produção de mudas de B. divaricata L. o regime hídrico deve ser de 100% e 80% da capacidade do recipiente, porém as mudas crescem satisfatoriamente. PALAVRAS-CHAVE: Espécie florestal. Matéria seca. Produção de mudas.

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“…This may result in synthesis of the reactive oxygen species (ROS) that damage the ATP synthase enzyme, delaying the synthesis of ribulose-1,5-bisphosphate (RuBP) and causing a decrease in Ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisco) activity. These are physiological events reflected as lower yield and production components, at lower irrigation depths (Chavarria et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Production components and water use efficiency of corn under irrigation depths

Anjos¹,

Azevedo²,

Ferraz³

et al. 2017

Aust J Crop Sci

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This study aims to analyze the production components and the water-use efficiency of corn cultivated with irrigation depths, and also to verify the utilization of multivariate analysis is suitable to highlight the relevant information. Hybrid corn AG 7088 was used as plant material. Two experiments were conducted under field conditions at two different experimental periods between the months of April and December 2015 in a randomized block design with six irrigation depths [50, 75, 100 (control), 125, 150, and 175% replacement of evapotranspiration -ET 0 ] and four replications. At 120 days after sowing, the following variables were evaluated: mass of one thousand grains, number of spikes per plot, yield of dry grains, ear length, ear diameter, number of lines per ear, number of grains per line, number of ears grain per spike, grain mass per spike, cob mass, spaghetti mass, and mass of straws. The results showed that production components and water use efficiency of hybrid corn AG 7088 were not affected by the varying water depths in the first experimental period. In the second period, the increase in water depth supported a gain in the mass of a thousand grains, dry grain yield, grain number per row, grain number per ear, corn cob mass and mass of dehusked ear, reducing the efficiency of water use. The use of multivariate analysis was able to reduce the multi-dimensional space of the set of variables in the three Principal Components with relevant information to highlight differences between irrigation depths and experimental periods.

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Restrição fotossintética de plantas de soja sob variação de disponibilidade hídrica

Abstract: RESUMO 004,006,026,164MPa)

Cited by 30 publications

References 17 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

Morphophysiological evaluation of Bauhinia divaricata L. (Fabaceae) plants at different water regimes

Production components and water use efficiency of corn under irrigation depths

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