Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10877018 | Journal of Plant Physiology | 2005 | 10 Pages |
Abstract
Results showed that under NaCl stress, Clâ was more toxic than Na+ to seedlings of G. max. Injury of six G. max cultivars, including 'Jackson' (salt sensitive) and 'Lee 68' (salt tolerant), was positively correlated with the content of Clâ in the leaves, and negatively with that in the roots. In subsequent research, seedlings of two G. max cultivars (salt-tolerant Nannong 1138-2, and salt-sensitive Zhongzihuangdou-yi) and two G. soja populations (BB52 and N23232) were subjected to isoosmotic solutions of 150Â mM Na+, Clâ and NaCl, respectively. G. max cv. Nannong 1138-2 and Zhongzihuangdou-yi were damaged much more heavily in the solution of Clâ than in that of Na+. Their leaves were found to be more sensitive to Clâ than to Na+, and salt tolerance of these two G. max cultivars was mainly due to successful withholding of Clâ in the roots and stems to decrease its content in the leaves. The reverse response to isoosmotic stress of 150Â mM Na+ and Clâ was shown in G. soja populations of BB52 and N23232; their leaves were not as susceptible to toxicity of Clâ as that of Na+. Salt tolerance of BB52 and N23232 was mainly due to successful withholding of Na+ in the roots and stems to decrease its content in the leaves. These results indicate that G. soja have advantages over G. max in those traits associated with the mechanism of Clâ tolerance, such as its withholding in roots and vacuoles of leaves. It is possible to use G. soja to improve the salt tolerance of G. max.
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Authors
Qingyun Luo, Bingjun Yu, Youliang Liu,