光对湖北光敏核不育水稻硝酸还原酶诱导的影响

EFFECT OF LIGHT ON THE INDUCTION OF NITRATE REDUCTASE IN HUBEI PHOTOPERIOD SENSITIVE GENIC MALE-STERILE RICE (HPGMR)

The experiment was conducted on rice (Nongken 58S) with the attempt to study the possible relationship between the phytochrome-controlled fertility transformation and NR (nitrate reductase) activity. The results showed that NR activity was the highest in the eliolated seedlings treated with 0.2 mmol, L~(-1) NADH. When etiolated seedlings was exposed to light, the NR activity elevated significantly with the increase in lighting time within 24 ours. It was also revealed by lighting the plants with different wave-length that both red and far red ight strengthened NR activity, but the red had stronger effect on NR than the far red. Forthermore, the effect of R or FR on NR activity was mutual reverseable.