Displacement of Ca<sup>2+</sup> by Na<sup>+</sup> from the Plasmalemma of Root Cells

Cramer, Grant R.; Läuchli, André; Polito, Vito S.

doi:10.1104/pp.79.1.207

Cited by 562 publications

(364 citation statements)

References 23 publications

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“…1). This beneficial effect of calcium on the development of plants grown under saline conditions has been reported previously (Cramer et al, 1985(Cramer et al, , 1986(Cramer et al, , 1988). Short-term experiments performed by adding supplemental calcium to the saline growth media had only ameliorative effects under NaCl stress (Azaizeh & Steudle, 1991 ;Azaizeh et al, 1992).…”

Section: mentioning

confidence: 68%

Does calcium ameliorate the negative effect of NaCl on melon root water transport by regulating aquaporin activity?

2000

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The hydraulic conductance (L ! ) of detached, exuding root systems from melon (Cucumis melo cv. Amarillo oro) was measured. All plants received a half-strength Hoagland nutrient solution, and plants stressed either solely with NaCl (50 mM) or with NaCl (50 mM) following treatment (2 d) with CaCl # (10 mM) were compared with controls and CaCl # -treated (10 mM) plants. The L ! of NaCl-treated plants was markedly decreased when compared to control and CaCl # -treated plants, but the decrease was smaller when NaCl was added to plants previously treated with CaCl # . A similar effect was observed when the flux of Ca# + into the xylem and the Ca# + concentration in the plasma membrane of the root cells were determined. In control, CaCl # -and NaCljCaCl # -treated plants, HgCl # treatment (50 µM) caused a sharp decline in L ! to values similar to those of NaCl-stressed roots, but L ! was restored by treatment with 5 mM DTT. However, in NaCl roots only a slight effect of Hg# + and DTT were observed. The effect of all treatments on L ! was similar to that on osmotic water permeability (P f ) of individual protoplasts isolated from roots. The results suggest that NaCl decreased the passage of water through the membrane and roots by reducing the activity of Hg-sensitive water channels. The ameliorative effect of Ca# + on NaCl stress could be related to water-channel function.

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Section: mentioning

confidence: 68%

Does calcium ameliorate the negative effect of NaCl on melon root water transport by regulating aquaporin activity?

2000

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“…Levando em conta que a coloração foi mais intensa nos ápices radiculares, a inibição do crescimento em feijão caupi deve envolver morte celular induzida pela salinidade nas regiões de crescimento. A morte celular pode ser desencadeada pela toxicidade iônica, já que o excesso de Na + externo pode deslocar o Ca +2 estrutural da superfície celular, acarretando a desestabilização da membrana plasmática e o conseqüente vazamento de componentes citoplasmáticos (Cramer et al 1985;Mengel & Kirkby 2001).…”

Section: Discussionunclassified

Atividade de enzimas antioxidantes e inibição do crescimento radicular de feijão caupi sob diferentes níveis de salinidade

et al. 2012

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ABSTRACT(Activities of antioxidant enzymes and root growth inhibition in cowpea seedlings exposed to diff erent salt levels). Phenol peroxidase (POX) is a dual enzyme that is involved with hydrogen peroxide scavenging and lignin biosynthesis, contributing to growth inhibition by secondary wall thickening. In order to relate growth inhibition to salt-induced oxidative modulation, the activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and POX were evaluated in cowpea roots under salinity. Four-day-old seedlings of the Pitiúba and Pérola cultivars were exposed to 0, 25, 50, 75 and 100 mM NaCl in germination paper under controlled conditions. Aft er two days of treatment, root length was reduced under 100 mM NaCl by 56 and 26% in Pitiúba and Pérola, respectively, which was associated with enhanced electrolyte leakage and cell death in the root apex. NaCl salinity did not trigger lipid peroxidation, indicating that cell death was probably due to membrane damage instead of oxidative stress. Salt stress reduced the activity of SOD, CAT and APX and increased the POX activity, demonstrating that this enzyme plays a role in oxidative protection in cowpea roots exposed to NaCl salinity. In conclusion, salt-induced growth inhibition in cowpea roots could be attributed, at least in part, to a coordinate action involving an increase in POX activity and a drop in CAT and APX activities. Atividade de enzimas antioxidantes e inibição do crescimento radicular de feijão caupi sob diferentes níveis de salinidade

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“…Growth reduction due to NaCl treatment illustrates the negative effect of salinity on plants, activated by altered osmotic potentials of salt in the root system that limits the gain of the required amount of water (Mer et al 2000). The growth and development of plants is therefore inhibited because of metabolic defects like altered membrane permeability (Cramer et al 1985). Khalid et al (2015) also reported that salinity reduced crop productivity by causing disruption of cell membranes, most likely due to nutrient imbalance…”

Section: Classification Of Genotypesmentioning

confidence: 99%

Genotypic variation in tolerance to salinity of common beans cultivated in Western Cameroon as assessed at germination and during early seedling growth

et al. 2017

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Open Agriculture. 2017; 2: 600-610 bean genotypes and most of their interactions. Significant correlations were found between all germination variables and between most growth parameters. From the effect of salt application, the common bean genotypes namely KEB-CB049, KEB-CB053 and Mac-33 were the most tolerant while KEB-CB055 and KEB-CB050 were the most sensitive. The results confirm that there is genotypic variation in salinity tolerance and that the most tolerant genotypes should be further explored in selection programs, with the aim that they should be promoted for cultivation in tropical zones affected by salinity.

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Displacement of Ca²⁺ by Na⁺ from the Plasmalemma of Root Cells

Cited by 562 publications

References 23 publications

Does calcium ameliorate the negative effect of NaCl on melon root water transport by regulating aquaporin activity?

Does calcium ameliorate the negative effect of NaCl on melon root water transport by regulating aquaporin activity?

Atividade de enzimas antioxidantes e inibição do crescimento radicular de feijão caupi sob diferentes níveis de salinidade

Genotypic variation in tolerance to salinity of common beans cultivated in Western Cameroon as assessed at germination and during early seedling growth

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Displacement of Ca2+ by Na+ from the Plasmalemma of Root Cells

Cited by 562 publications

References 23 publications

Does calcium ameliorate the negative effect of NaCl on melon root water transport by regulating aquaporin activity?

Does calcium ameliorate the negative effect of NaCl on melon root water transport by regulating aquaporin activity?

Atividade de enzimas antioxidantes e inibição do crescimento radicular de feijão caupi sob diferentes níveis de salinidade

Genotypic variation in tolerance to salinity of common beans cultivated in Western Cameroon as assessed at germination and during early seedling growth

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Displacement of Ca²⁺ by Na⁺ from the Plasmalemma of Root Cells