Morphological modifications in soybean in response to soil water management

Gonçalves, Clebson Gomes; Silva, Antonio Carlos da; Pereira, María Renata Rocha; Gasparino, Eduardo Custódio; Martins, D.

doi:10.1007/s10725-017-0287-y

Cited by 15 publications

(10 citation statements)

References 32 publications

(35 reference statements)

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“…When submitted to water deficit, plants develop morphological and/or physiological mechanisms to reduce water loss by transpiration, through stomatal closure, leaf area reduction or trichome increase. Other mechanisms are the senescence of older leaves and also the increase of epicuticular wax accumulation, which maintains the hydration of the tissues that are still alive, without reducing the photosynthetic rate (Muller et al, 2011;Zhou et al, 2015;Gonçalves et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effect of Glyphosate on Guineagrass Submitted to Different Soil Water Potential

et al. 2018

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The action of herbicides on weeds that develop under water deficit can be compromised, because the routes of penetration of hydrophilic herbicides are reduced due to the lower hydration of the cuticle in these plants. Moreover, hydrophobic compounds found in the epicuticular wax coating of plants under water stress, hinder the penetration of hydrophilic compounds. This study evaluated the control efficiency of glyphosate on guineagrass plants when submitted to different water deficits. The study was conducted in a greenhouse, and treatments were composed of guineagrass plants submitted to three soil water conditions [low water deficit (13%), intermediate water deficit (10%) and high water restriction (8%)], three doses of glyphosate (0.0, 270.0 and 540.0 g ha-1) and two phenological stages of plant development (4-6 leaves and 1-3 tillers). The water management started when plants presented two developed leaves. Visual evaluations were performed 7, 14, 21 and 35 days after the application of the herbicide; the morpho-physiological parameters of the specific leaf area, stomatal conductance and the difference between the environment temperature and the leaf temperature on the day of the herbicide application were also analyzed at the end of the study, as well as the dry matter of shoot and root. With the increase of the water restriction, there was a decrease in the analyzed morpho-physiological parameters, as well as in the dry matter accumulation of the shoot and roots of the studied plants. Plant control was more efficient when a 540 g ha-1 dose of glyphosate was applied, and when they were controlled at their vegetative stage of 1-3 tiller, and with a water management of 13%. It is possible to state that guineagrass under water restriction have less control efficacy when treated with glyphosate.

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Section: Introductionmentioning

confidence: 99%

Effect of Glyphosate on Guineagrass Submitted to Different Soil Water Potential

et al. 2018

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“…The lowest growth rates were observed in the plants subjected to water deficits of -0.5 MPa. Several studies reported that plants reduce their growth and leaf area under water deficit as a response to water loss by photorespiration (LIU;JENSEN;ANDERSEN, 2003;MAK et al, 2014;GONÇALVES et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

“…In addition, plants trigger different physiological adaptations that have deleterious effects-metabolic impairment of the photosynthetic apparatus, oxidative damages, hormonal changes, and accumulation of stress-related proteins-which interrupt cellular and molecular physiological and biochemical processes (SILVA et al, 2010;ASHRAF;HARRIS, 2013;GALMÉS et al, 2013). Plants have anatomical modifications that are specific adaptive processes to water stress, such as reductions in stomatal density, number of leaves, leaf expansion, xylem diameter, and parenchymal cell diameter, alterations in architecture, xylem to phloem ratio, and increase in vascular tissue and cell wall thickness (GUERFEL et al, 2009;MAKBUL et al, 2011;TRIPATHI et al, 2016;GONÇALVES et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Chlorimuron-Ethyl in Conventional and Transgenic Soybean Cultivars Under Water Deficit Stress

et al. 2018

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Water deficit is a limiting factor for the soybean yield; it triggers different physiological and anatomical adaptations that have deleterious effects on the plants and can affect the selectivity of herbicides, causing production losses. In this context, the objective of this work was to evaluate the action of the chlorimuron-ethyl herbicide when applied at different stages of soybean plants, using conventional and transgenic cultivars, and different soil water potentials. A rate of 20 g ha-1 of the chlorimuron-ethyl herbicide was applied to two soybean cultivars (MG/BR46-Conquista - conventional, and BRS-Valiosa-RR - transgenic) at two phenological stages (V2 - first fully expanded trifoliate leaves, and V4 - third fully expanded trifoliate leaves), using three soil water potentials (-0.03 MPa, -0.07 MPa, and -0.5 MPa). Phytotoxicity, and plant height were evaluated at 3, 7, 14, and 21 days after the herbicide application. The shoot dry weight, root dry weight, and root system nodulation were evaluated. The soybean plants had lower phytotoxicity when subjected to application of chlorimuron-ethyl under water deficit conditions. The use of chlorimuron-ethyl reduced the growth and biomass of soybean plants and affected the plants' root system nodulation. The transgenic cultivar (BRS-Valiosa-RR) presented better performance when subjected to a moderate water deficit (-0.07 MPa), which contributes to biological nitrogen fixation.

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“…É essencial ao entendimento do patossistema a realização de estudos que concatenem a interferência de fatores abióticos adversos e seu efeito sob a infecção por P. pachyrhizi, bem como o valor fisiológico e epidemiológico dessa interação. É verdade, porém, que muitos estudos relacionam fatores extremos e sua influência no desenvolvimento de doenças, entretanto, poucos delineamentos buscam evidenciar o efeito de condições estressantes mais brandas e prolongadas (GONÇALVES et al, 2017;COHEN et al, 2020). Tal relação tem grande aplicação prática no desenvolvimento de estratégias de manejo da doença.…”

Section: Introductionunclassified

Efeito da limitação hídrica no patossistema >i<Phakopsora pachyrhizi>/i<-soja

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Morphological modifications in soybean in response to soil water management

Cited by 15 publications

References 32 publications

Effect of Glyphosate on Guineagrass Submitted to Different Soil Water Potential

Effect of Glyphosate on Guineagrass Submitted to Different Soil Water Potential

Chlorimuron-Ethyl in Conventional and Transgenic Soybean Cultivars Under Water Deficit Stress

Efeito da limitação hídrica no patossistema >i<Phakopsora pachyrhizi>/i<-soja

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