Root physiology of japonica and indica rices (Oryza sativa L.) . 2. Nitrogen uptake and the enzyme activities of nitrogen metabolism

Hou, C.R.; Lai, K.L.

Journal of the Agricultural Association of China 124: 10-18


Accession: 001247776

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In excised rice root tips, N uptake with nitrate as N source was more rapid in japonica cv. Taichung 65 than in the indica cv. Taichung Native 1 during the 1st 4 days of culture. Uptake then became very slow in the japonica cv. but increased as length and wt. of root increased in the indica cv. Growth and N uptake curves were similar. Activities of nitrate reductase and glutamate dehydrogenase were higher in roots of the indica cv. than in those of the japonica cv.