Arsenic stress induces changes in lipid signalling and evokes the stomata closure in soybean

Armendariz, Ana Laura; Talano, Melina A.; Villasuso, Ana Laura; Travaglia, Claudia; Racagni, G.; Reinoso, Herminda; Agostini, Elizabeth

doi:10.1016/j.plaphy.2016.02.041

Cited by 46 publications

(19 citation statements)

References 55 publications

(68 reference statements)

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“…The observed changes in the organization and conformation of root xylem and phloem ( Fig. 5C and D) also resulted in lower E. Changes to the root vessels lead to decreased turgor in shoot tissues, cause stomatal closure on the adaxial and abaxial leaf surface, and promote disorganization of leaf tissues (Pietrini et al, 2015;Armendariz et al, 2016), as observed in the present study (Figs. 5A, B and 6).…”

Section: Dry Mass Production Gas Exchange and Nitrogen-assimilating supporting

confidence: 81%

A glimpse into the physiological, biochemical and nutritional status of soybean plants under Ni-stress conditions

Reis

Barcelos

Osório

et al. 2017

Environmental and Experimental Botany

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Nickel (Ni) toxicity has been reported to decrease productivity in soybean (Glycine max L.). However, soybean responses to Ni toxicity are not well understood. The aim of the present study was to describe Ni toxicity in soybean plants through physiological, nutritional, and ultrastructural analyses. Plants were grown in nutrient solution containing increasing Ni concentrations (0, 0.05, 0.1, 0.5, 10, and 20 μmol L −1), and nutritional, anatomical, physiological and biochemical features were determined. The results revealed previously unreported detrimental effects of Ni toxicity on soybean plants. CO 2 assimilation rates, stomatal conductance and transpiration decreased, resulting in lower biomass in soybean plants exposed to the highest Ni levels. Nitrate reductase activity increased with up to 0.05 μmol L −1 Ni and then decreased, indicating halted N-metabolism. Urease activity increased with increasing Ni availability in the nutrient solution, and peroxidase and superoxide dismutase activities were higher in plants grown at higher Ni levels. Leaf epidermal thickness (abaxial and adaxial), as well as root xylem and phloem diameter, decreased starting at 0.1 μmol L −1 Ni. Mean Ni concentrations varied from 77.5 to 17,797.4 mg kg −1 in roots and 2.3 to 16,774.5 mg kg −1 in shoots. Soybean plants exhibited symptoms of Ni toxicity starting at 0.1 μmol L −1 Ni, presenting mean shoot Ni concentration of 28.9 mg kg −1 , along with leaf water loss until complete drying. The results contribute to our understanding of several physiological, biochemical and histological mechanisms of Ni toxicity in soybean, which is still poorly understood.

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Section: Dry Mass Production Gas Exchange and Nitrogen-assimilating supporting

confidence: 81%

A glimpse into the physiological, biochemical and nutritional status of soybean plants under Ni-stress conditions

Reis

Barcelos

Osório

et al. 2017

Environmental and Experimental Botany

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“…In signal transduction processes, it is accepted that PtdOH accumulation can originate through two main routes: the hydrolysis of PtdCho/PtdEtn catalyzed by PLD or the combined action of phospholipase C (PtdIns-PLC) and DGK (Arisz et al, 2013;Peters et al, 2010;Pokotylo et al, 2014). In plants, an increase in PtdOH levels through both pathways has also been reported in plants treated with arsenic and phenol (Armendariz et al, 2016;Ibañez et al, 2016;Sosa Alderete et al, 2012). Here, the results observed in DGK and PtdInsK activities suggest that a PLC could modulate the PtdOH level in bacteria treated with Cr(VI) and phenol (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The presence of these and other pollutants generates environmental signals whose perception is considered to occur at the cell membrane level (Sohlenkamp and Geiger, 2015). It is well known that some minor membrane PL, such as phosphoinositides (PPIns: phosphatidylinositol-4-phosphate [PtdIns-4-P], PtdIns-4,5-P) and phosphatidic acid (PtdOH), are associated with abiotic stress responses in eukaryote organisms (Armendariz et al, 2016;Cocco et al, 2015;Darwish et al, 2009;De Craene et al, 2017;Horváth et al, 2012;Ibañez et al, 2016;Martínez-Estévez et al, 2003;Ruelland et al, 2014;Xue et al, 2009). However, early signaling events involving signals mediated by lipids remain unexplored in bacteria.…”

Section: Introductionmentioning

confidence: 99%

Membrane Rigidity and Phosphatidic Acid (PtdOH) Signal: Two Important Events in Acinetobacter guillouiae SFC 500‐1A Exposed to Chromium(VI) and Phenol

Fernández

Paulucci

Margutti

et al. 2019

Lipids

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The remodeling of membrane lipids is a mechanism that allows microorganisms to survive in unfavorable environments such as industrial effluents, which often contain inorganic and organic pollutants, like chromium and phenol. In the present work, we evaluated the effect of Cr(VI) and phenol on the membrane of Acinetobacter guillouiae SFC 500‐1A, a bacterial strain isolated from tannery sediments where such pollutants can be found. The presence of lipid kinases and phospholipases and the changes in their activities under exposure to these pollutants were determined. Cr(VI) and Cr(VI) + phenol caused the membrane to become more rigid for up to 16 h after exposure. This could be due to an increase in cardiolipin (Ptd2Gro) and a decrease in phosphatidylethanolamine (PtdEtn), which are indicative of more order and rigidity in the membrane. Increased phospholipase A activity (PLA, EC 3.1.1.4) could be responsible for the decrease in PtdEtn levels. Moreover, our results indicate that Cr(VI) and Cr(VI) + phenol trigger the phosphatidic acid (PtdOH) signal. The finding of significantly increased phosphatidylinositol‐4‐phosphate (PtdIns‐4‐P) levels means this is likely achieved via PtdIns‐PLC/DGK. This report provides the first evidence that A. guillouiae SFC 500‐1A is able to sense Cr(VI) and phenol, transduce this signal through changes in the physical state of the membrane, and trigger lipid‐signaling events.

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“…Plants have developed mechanisms to prevent their own toxicity by regulating the transportation of the toxic elements with chelation or sequestration. Different strategies are performed to deal with high concentration levels of TEs in the environment [24][25]. The uptake and efflux of metals ions at cellular level must be strictly coordinated with the requirements of the whole plant to maintain homeostasis [26].…”

Section: Correlations Within Trace Elements Contentsmentioning

confidence: 99%

Determination of As, Cd, Cu, Fe, Ni, Pb and Zn in Soybean Seeds and their Correlation with Relevant Biochemical Parameters to assess Food Quality

Pistón¹,

Viera²,

Machado³

et al. 2019

Br J Anal Chem

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Soybean (Glycine max) represents one of the most important crops in Uruguay, mostly processed for animal feed, while a smaller percentage is processed for human consumption. Soy foodstuffs are also a source of trace elements (TEs). Cu, Fe, Ni, Zn, As, Cd and Pb were determined in soybean seeds batches and correlations within them and with biochemical parameters (superoxide anion content, superoxide dismutase enzyme and viability of the analyzed seeds) were studied. Analytical determinations of Cu, Fe and Zn were performed by flame atomic absorption atomic spectrometry (FAAS) while As, Cd, Ni and Pb were determined by electrothermal atomic absorption spectrometry (ETAAS). For sample preparation, a-1 microwave assisted digestion was carried out using diluted acid (3.5 mol L HNO). The concentrations of 3-1-1 the essential elements where in the following ranges: 12-24 mg kg for Cu, 60-125 mg kg for Fe, 5.4-1-1-1 17.9 mg kg for Ni and 33-50 mg kg for Zn. Cd and As content was < 0.2 and 0.3 mg kg respectively,-1 whereas Pb exceeded slightly the admitted limit in five samples (above 0.2 mg kg). Positive correlations were found for Fe:Cd:Pb (p<0.005), Cu:Fe, As:Cd:Pb and Zn:Ni (p<0.05). A novel highly significant positive correlation (p < 0.005) between Cd content and seed quality parameters related to seed germination was found. This suggests that the concentration of Cd do not produce negative effects in the development of the seedlings, despite this Cd and Pb levels must be monitored to guarantee food safety.

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Arsenic stress induces changes in lipid signalling and evokes the stomata closure in soybean

Cited by 46 publications

References 55 publications

A glimpse into the physiological, biochemical and nutritional status of soybean plants under Ni-stress conditions

A glimpse into the physiological, biochemical and nutritional status of soybean plants under Ni-stress conditions

Membrane Rigidity and Phosphatidic Acid (PtdOH) Signal: Two Important Events in Acinetobacter guillouiae SFC 500‐1A Exposed to Chromium(VI) and Phenol

Determination of As, Cd, Cu, Fe, Ni, Pb and Zn in Soybean Seeds and their Correlation with Relevant Biochemical Parameters to assess Food Quality

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