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耐盐性不同的小麦根和根茎结合部的拒Na~(+)作用

杨洪兵, 丁顺华, 邱念伟, 王宝山, 崔大勇

山东师范大学逆境植物研究所.山东.济南 250014；中科院上海植物生理研究所.上海 200032

摘要

NaCl处理引起小麦幼苗干重下降,盐敏感品种比耐盐品种下降幅度要大。盐敏感品种的拒Na~(+)能力为35%左右,耐盐品种的拒Na~(+)能力为50%-60%左右,这表明耐盐品种的拒Na~(+)能力远远大于盐敏感品种。不同耐盐性小麦的拒Na~(+)部位不同,盐敏感品种的拒Na~(+)部位主要在根茎结合部,而耐盐品种的拒Na~(+)部位主要在根部。

关键词： 小麦; NaCl处理; 木质部汁液; 拒Na+能力; 拒Na+作用; 拒Na+部位

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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引用本文：

杨洪兵, 丁顺华, 邱念伟, 王宝山, 崔大勇. 耐盐性不同的小麦根和根茎结合部的拒Na~(+)作用[J]. 生理学报 2001; 53 (2): .

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).