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KMID : 0613820030130040473
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Journal of Life Science
2003 Volume.13 No. 4 p.473 ~ p.480
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Comparison of Patterns of Mineral Ions and Growth Responses of 4 Legume Plants by Nitrogen Applications under Saline Conditions
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Bae Jeong-Jin
Choo Yeon-Sik
Song Seung-Dal
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Abstract
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We analyzed the patterns of mineral ions and growth responses among symbiotic nitrogen fixing legumes by external nitrogen applications under salt gradients. Glycine max, Phaseolus angularis and Albizzia julibrissin showed remarkable growth inhibition above 40 mM NaCl treatments, but Cassia tora did not exhibit any visible injury symptom up to 100 mM NaCl treatments. As to ionic pattern, the Na+ and Cl- contents in leaves of G. max, P. angularis and A. julibrissin progressively increased with higher contents of external salinity. Compared to other plants, C. tora excluded Na+ more efficiently and maintained rather constant ionic contents in spite of high salt levels. With a few exception, these 4 legume plants exhibited better growth by the external nitrogen supply rather than the contribution of symbiotic nitrogen fixation only under saline condition.
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KEYWORD
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salt, ionic pattern, four legumes, nitrogen content
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