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Extracellular Ca^sup 2+^ Ameliorates NaCl-Induced K+ Loss from Arabidopsis Root and Leaf Cells by Controlling Plasma Membrane K+-Permeable Channels1
From:
Plant Physiology
| Date:
August 1, 2006| Author:
Shabala, Sergey; Demidchik, Vadim; Shabala, Lana; Cuin, Tracey A; Et al
| Copyright American Society of Plant Physiologists Aug 2006. Provided by ProQuest LLC.Copyright information
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Calcium can ameliorate Na+ toxicity in plants by decreasing Na+ influx through nonselective cation channels. Here, we show that elevated external [Ca^sup 2+^] also inhibits Na+-induced K+ efflux through outwardly directed, K+-permeable channels. Noninvasive ion flux measuring and patch-clamp techniques were used to characterize K+ fluxes from Arabidopsis (Arabidopsis thaliana) root mature epidermis and leaf mesophyll under various Ca^sup 2+^ to Na+ ratios. NaCl-induced K+ efflux was not relat...
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