灌浆期高温胁迫对冬小麦叶源、库器官生理活性的影响及调控

Effects of High Temperature Stress on the Source and Sink Organ of Winter Wheat During Filling Stage and Its Regulation

研究了灌浆期高温胁迫条件对冬小麦叶源、库器官某些生理指标的影响。结果表明 ,高温胁迫导致冬小麦叶源、库活性显著降低。高温胁迫能显著降低冬小麦子粒蔗糖酶的活性 ,降低子粒可溶性糖含量 ,胁迫发生初期子粒ATP酶的活性迅速降低 ;高温胁迫导致冬小麦的旗叶MDA含量、脯氨酸含量上升。适当的调节剂处理能显著改变高温胁迫条件下上述生理指标的变化动态 ,显著抑制高温胁迫条件下冬小麦旗叶光合性能的下降 ,延缓叶片衰老的进程 ,对保持叶源、库器官的生理活性有显著的作用 ,协调源库关系 。

The study focused on the physiological damages of the high temperature stress on the winter wheat in the filling stage.The following aspects were researched in this experiment,the result indicated that the high temperature stress can decrease the activity of ATPase,decrease the content of solubility sugar on the grain.The stress can improve the MDA and Pro content in the flag leaf and the 2nd leaf from top.HuakongⅡ(Ⅱ) can restrain the decrease of ATPase activity of the grain and the MDA and Pro content in the function leaves,in this way,it keep the higher activity of source and sink organ of winter wheat under the stress condition.