RELATIONSHIPS OF DINITROGEN FIXATION (ACETYLENE REDUCTION) WITH RESPIRATION, ATP, AND MAGNESIUM IN SOYBEAN NODULES
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概要
- 論文の詳細を見る
Soybean plants (Glycine max L. cv. Akisengoku) were grown in water culture in a green-house. At the pod-setting and pod-filling stages ,plants were subjected to stem-ringing or treated with high concentration of nitrate. Respiration and N_2 fixation (acetylene reducing activity ) were studied in individual nodules along with the concentrations of ATP and magnesium. There was a high positive correlation between respiration activity and acetylene reduction in soybean nodules. The maintenance respiration in mature nodules corresponded to a CO_2 evolution of 5.5 μmol/g F.W., and the respiratory cost for nitrogen fixation was estimated at 2mg C liberated/mg N fixed, though this value was probably underestimated due to CO_2 fixation by the nodules. For the nitrogenase activity there was a threshold value of ATP concentration at around 0.15 μmol/g F.W., and the activity increased up to around 0.35 μmol/g F.W., beyond which the ATP concentration did not increase unlike the nitrogenase activity. The values for the magnesium concentration in the nodules detected in the present experiments were above the optimum level.
- 社団法人日本土壌肥料学会の論文
著者
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Yoneyama Tadakatsu
Department Of Agricultural Chemistry University Of Tokyo:(present Address)division Of Environmental
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Ishizuka J
National Inst. Agrobiological Resources Ibaraki Jpn
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Ishizuka Junji
Department Of Agricultural Chemistry Faculty Of Agriculture Kyushu University
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Yoneyama Tadakatsu
Department Of Applied Physiology National Institute Of Agrobiological Resources
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KANAMORI Tetsuo
Upland Farming Division, Hokkaido National Agricultural Experiment Station
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Kanamori T
Shikoku National Agricultural Experiment Station Zentsuji Jpn
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Yoneyama Tadakatsu
Department Of Agricultural Chemistry University Of Tokyo
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Yoneyama Tadakatsu
Department of Applied Physiology, National Institute of Agrobiological Resources
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