Journal of Plant Biology
- Volume 30 Issue 3
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- Pages.205-213
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- 1987
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- 1226-9239(pISSN)
Effects of $NO_3^-$ Gradients on Nitrogen Fixation, Nitrate Reduction and Ureide Content of Soybean
대두의 공소개정, 공산환원 및 Ureide함량에 미치는$NO_3^-$ 의 영향
Abstract
Soybean, inoculated with effective Rhizobium japonicum 110, were grown by sand culture with nutrient solution containing either of 0, 1, 3, 10 or 30mM NO3-/l, and analyzed growth characteristics, NR activity, N2-fixation activity, and changes of ureide contents during the growing period. The amount of nodule formation decreased abruptly by nitrate treatment, the maximum nodule dry weight was 1.59, 1.05, 0.78, 0.09 and 0.008 g plant-1, respectively for each treatment on the 98th day. Specfic activity of N2-fixation showed the maximum rates of 140, 101, 37, 5 and 2.2 nM dw.mg-1.hr-1, respectively for each treatment in the earlier growth period. The maximum acetylene reduction activity on the 98th day after sowing was 81.5, 35.3, 14.3, 0.1 and 0.0045
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