| The changes of amylose accumulation, enzyme activity in related and photosynthetic parameters of three rice varieties with high, medium and low amylose content after anthesis were investigated. The results showed that the Logistic model had a good predictive ability to the amylose accumulation in grain of testing varieties. The active days of amylose accumulation of B2You768 was significant higher than that of Chengnuo397 and Yixiang707, and GBSS activity of B2You768 could maintain high value for longer periods. The change of amylose accumulation rate of Chengnuo397 was very significant and positively correlated with transpiration rate of flag leaves after anthesis, while this change in Yixiang707 was significant and positively correlated with net photosynthetic rate. The accumulation of amylose in grain and the changes of photosynthetic parameters in flag leaves wer notcompletely in sync, and there was a significant variety specificity among them. |
