CHARACTERISTICS OF ASPARAGINE POOL IN SOYBEAN NODULES IN COMPARISON WITH UREIDE POOL
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概要
- 論文の詳細を見る
The changes in the content of nitrogenous compound in intact soybean nodules were investigated by inhibiting nitrogen fixation with acetylene application. The contents of ureides (allantoin and allantoic acid), asparagine, and glutamine decreased by the acetylene treatment. Incorporation of ^<15>N into asparagine, ureides, and other nitrogenous compounds in intact soybean nodules was also investigated by the long term feeding of gaseous ^<15>N_2. Approximately 68% nitrogen in the ureide pool and 35% nitrogen in the asparagine pool were derived from gaseous ^<15>N_2 at 5.5 h after ^<15>N_2 exposure. The flow rate of newly fixed nitrogen via the asparagine pool was from 17 to 22% of that via the ureide pool, which was estimated based on the data of the acetylene inhibition experiment and ^<15>N tracer experiment. A larger quantity of ^<15>N was incorporated into the amido-N of asparagine than into its amino-N, and ^<15>N incorporation into ammonia was almost similar to that into asparagine at 5.5 h after ^<15>N_2 exposure. The characteristics of the asparagine, aspartate, ammonia, and ureide pools in soybean nodules are discussed based on these results.
- 社団法人日本土壌肥料学会の論文
著者
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Kumazawa Kikuo
Department Of Agricultural Chemistry The University Of Tokyo
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MlNAMISAWA Kiwamu
Department ofAgricultural Chemistry, The University of Tokyo
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ARIMA Yasuhrro
Department of Agricultural Chemistry, The University of Tokyo
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Arima Yasuhrro
Department Of Agricultural Chemistry The University Of Tokyo
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Mlnamisawa Kiwamu
Department Of Agricultural Chemistry The University Of Tokyo
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