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Influence of K ~(+) to the accumulation of glycinebetaine of spinach under NaCl stress

Hou Caixia, Tang Zhangcheng

Shanghai Institute of Plant Physiology,Chinese Academy of Sciences.Shanghai 200032

Abstract

Changes of ionic content and composition of spinach leaf are differential in response to salinity in the presence or absence of K~(+). The content of glycinebetaine and the activity of betaine aldehyde dehydrogenase (BADH) in spinach leaves treated with different concentrations of NaCl without K~(+) were lower than those with K~(+). The content of glycinebetaine in those leaves cultured in Hoagland solution without K~(+) was lower than that with K~(+). Culturing seedling with Hoagland solution without K~(+) or with TEA (tetraethylammonium chloride) 10 mmol/L, a K~(+)-channel inhibitor, also resulted in a lower BADH activity.

Key words: K~(+);NaCl stress;Glycinebetaine;Betaine aldehyde dehydrogenase(BADH);Spinach

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Citing This Article：

Hou Caixia, Tang Zhangcheng. Influence of K ~(+) to the accumulation of glycinebetaine of spinach under NaCl stress. Acta Physiol Sin 1998; 50 (2): (in Chinese with English abstract).