University Botany Laboratory, Madras-5, India.
Planta. 1966 Jun;71(2):125-9. doi: 10.1007/BF00390132.
Studies reported here reveal a low nitrate reductase activity in the shoots of MTU 9 rice plants while in roots high enzyme activity has been recorded.Under pathogenesis, a low nitrate reductase activity in the roots and a high enzyme activity in the shoots have been recorded in susceptible rice plants. In the resistant rice plants (GEB 24) no such marked difference in the enzyme activity has been observed.The effect of fusaric and gibberellic acid on this enzyme activity has been studied. In the case of fusaric acid, the nitrate reductase activity in the roots is inversely proportional to the concentration whereas in gibberellic acid, it is directly proportional to the concentration in the shoots.
本研究揭示了 MTU9 水稻植株茎部的硝酸还原酶活性较低，而根部的酶活性较高。在感病植物中，根中的硝酸还原酶活性较低，而茎中的酶活性较高。在抗病水稻植株（GEB24）中，未观察到这种明显的酶活性差异。本研究还探讨了镰刀菌酸和赤霉素对该酶活性的影响。在镰刀菌酸的情况下，根部的硝酸还原酶活性与浓度呈反比，而在赤霉素的情况下，茎部的酶活性与浓度呈正比。
