Abstract:

3H-glucose trace technique were applied to rice to study the response the redistribution of reserved-assimilate to aerobic condition at seed-filling stage. Labelled the top full-opened leaf at late tillering stage, the mark stored mainly in sheath and the second leaf from the top at flowering stage. The source of radioactivity in spike came mainly from sheath and the top leaf from flowering to mature stage, and the radioactivity in spike of paddy rice was more than aerobic rice. There were more non-structural mark in aerobic rice than paddy rice at flowering stage, while the amount of redistributed mark to spike of aerobic rice during grain filling period was less than paddy rice.