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Na~(+) exclusion by roots and root-stem junctions of wheat cultivars with different salt tolerance

Yang Hongbing, Ding Shunhua, Qiu Nianwei, Wang Baoshan, Cui Dayong

Institute of Plant Stress,Shandong Normal University.Jinan 250014,Shandong；China

Abstract

NaCl treatment caused a decrease in dry weight of wheat seedlings, and the degree of decrease was higher in salt-sensitive cultivars than in salt-tolerant ones. The Na~(+)-exclusion capability of salt-sensitive cultivars was about 35%, and that of salt-tolerant cultivars was 50%-60%. This suggests that the Na~(+)-exclusion capability of salt-tolerant cultivars is stronger than salt-sensitive ones. It also indicates that the Na~(+)-exclusion localization of wheat with different salt-tolerance was different: In salt-sensitive cultivars. Na~(+)-exclusion occurred mainly in the root-stem junction, but salt-tolerant cultivars occurred mainly in the root.

Key words: Wheat;NaCl treatment;Xylem sap;Na~(+)-exclusion capability;Na~(+)-exclusion function;Na~(+)-exclusion localization

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Citing This Article：

Yang Hongbing, Ding Shunhua, Qiu Nianwei, Wang Baoshan, Cui Dayong. Na~(+) exclusion by roots and root-stem junctions of wheat cultivars with different salt tolerance. Acta Physiol Sin 2001; 53 (2): (in Chinese with English abstract).