高温胁迫对冬小麦灌浆期物质运输与分配的影响

以14C饲喂旗叶为方法，研究了高温胁迫（持续变温及控制高温）对冬小麦灌浆期物质运输与分配的影响。结果表明，高温胁迫影响旗叶光和性能并影响光和产物的输出与向库器官的分配，减少籽粒和韧皮都汁液中蔗糖的含量，改变14C同化物的输出动态，导致灌浆强度和千粒重急剧下降，最终导致产量降低。

Effect of High Temperture Stress on Transportation and Distribution of 14C-assimilates in Grain Filling Period of Winter Wheat

The effects of high temperture stress on the transpotation and distribution of as-similates in the winter wheat was studied by means of 14C feeding technology. The resultshows that the high temperture stress in the filling stage of winter wheat can significantlydecrease the yield, decrease the speed of filling grain. On the other hand,it can also decreasethe solvable sugar content in the grain and the phloem exudate from peduncel- The 14C-assim-ilates of high temperture stress treated wheat also has lower percentage in the spike whilehigher percentage in the flag leaf.