Effect of exogenous NH4+-N supply on distribution of ureide content in various tissues of alfalfa plants, Medicago sativa
文献类型: 外文期刊
第一作者: Cheng, XG
作者: Cheng, XG;Nomura, M;Sato, T;Fujikake, H;Ohyama, T;Tajima, S
作者机构:
关键词: alfalfa;capillary electrophoresis;Lotus corniculatus;ureide;xylem sap
期刊名称:SOIL SCIENCE AND PLANT NUTRITION ( 影响因子:2.389; 五年影响因子:2.525 )
ISSN: 0038-0768
年卷期: 1999 年 45 卷 4 期
页码:
收录情况: SCI
摘要: The profile of ureide (allantoin and allantoic acid) accumulation in various tissues of alfalfa, Medicago sativa, was surveyed under different nitrogen nutrient conditions. In the xylem sap, the ratio of ureides to asparagine of two amide type legumes, alfalfa and Lotus corniculatus, was 14 times lower than that of a typical ureide type legume, soybean when they grew in a nitrogen-free nutrient solution. In alfalfa planes, the ureide concentration was higher in the lateral roots and in the nodules than in other tissues. In the main root the concentration of ureide increased gradually towards the root Lip. This distribution of ureides, except for the nodule tissues, was similar to that of the non-nodulating soybean variety. Application of ammonium sulfate to the root system slightly increased the ureide content in various tissues of alfalfa in the short term, while the ureide content in the nodule tissues rather decreased after the treatment. The data indicated that ureide accumulation mainly occurred in roots and leaves in the case of alfalfa in the same way as in non-nodulating soybean plants, although the content was much lower than in soybean nodules.
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