江苏野生大豆的耐盐性和离子在体内的分布及选择性运输

应用生态学报 ›› 2003, Vol. ›› Issue (12): 2237-2240.

江苏野生大豆的耐盐性和离子在体内的分布及选择性运输

杨晓英, 章文华, 王庆亚, 刘友良

南京农业大学农业部作物生长调控重点实验室, 南京 210095

收稿日期:2002-02-02 修回日期:2002-06-20 出版日期:2003-12-15
通讯作者: 刘友良
基金资助:
国家自然科学基金项目(39870069);江苏省科委资助项目(BJ99033)

Salt tolerance of wild soybeans in Jiangsu and its relation with ionic distribution and selective transportation

YANG Xiaoying, ZHANG Wenhua, WANG Qingya, LIU Youliang

Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China

Received:2002-02-02 Revised:2002-06-20 Online:2003-12-15

摘要/Abstract

摘要： 以相对发芽率和出苗率为指标比较了3个野生大豆(Glycine soja)种群的耐盐性,测定了NaCl胁迫下2个耐盐性不同的野生大豆种群(江苏野生大豆,JWS,耐盐;N₂3232,盐敏感)植株根、茎和叶片中Na⁺、K⁺和Cl^-含量的变化.结果表明,JWS的耐盐性最强.盐胁迫抑制野生大豆幼苗生长,使其干物质积累量减少,根冠比上升,对耐盐性弱的N₂3232抑制作用大于耐盐性强的JWS.不同器官离子含量测定结果表明,盐胁迫下野生大豆茎部Na⁺含量最高,耐盐的JWS根系具有积累Na⁺和Cl^-的能力,叶片Na⁺、Cl^-含量较低,而盐敏感种群N₂3232根系中Na⁺、Cl^-含量低于耐盐种群JWS,叶片中Na⁺、Cl^-含量则高于JWS.JWS根系对K⁺、Na⁺吸收的选择性(selectivity ratio,SK,Na)和N₂3232没有明显差异;但叶片和茎运输的SK,Na明显高于N₂3232,使地上部K⁺/Na⁺较高,因此认为野生大豆根系对Na⁺、Cl^-的积累及K⁺向地上部运输的选择性高是其耐盐性强的主要原因.

Abstract: The salt tolerance of 3 wild soybean(Glycine soja)populations was compared with their relative germination and seedling emergence. The results showed that the salt tolerance of Jiangsu wild soybean (JWS) was the strongest. Under NaCl stress,the dry matter accumulation in wild soybean seedlings decreased,root/shoot ratio increased,and these effects were greater in N₂3232 (salt sensitive) than in JWS (salt tolerant). Determinations on the ion contents in different organs indicated that the Na⁺ content was higher in stem than in other organs,and the accumulation of Na⁺ and Cl^- in roots was significantly more in JWSthan in N₂3232. The contents of these ions in JWSleaves were much less than those in N₂3232 leaves. There was no significant difference between selective absorptions of K⁺ and Na⁺ (AS K,Na) by the two populations,but the selective transportation of K⁺ and Na⁺ (TS K,Na) in stem and leaf was much higher in JWSthan in N₂3232,resulted in the higher K⁺/Na⁺ ratio in JWSshoots. It is suggested that the main reason for the salt tolerance in salt tolerant wild soybean was the accumulation of Na⁺ and Cl^- in roots and stems and the higher selective transportation of K⁺ from root to shoot.

中图分类号:

杨晓英, 章文华, 王庆亚, 刘友良. 江苏野生大豆的耐盐性和离子在体内的分布及选择性运输[J]. 应用生态学报, 2003, (12): 2237-2240.

YANG Xiaoying, ZHANG Wenhua, WANG Qingya, LIU Youliang . Salt tolerance of wild soybeans in Jiangsu and its relation with ionic distribution and selective transportation[J]. Chinese Journal of Applied Ecology, 2003, (12): 2237-2240.

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