小麦冠层光合器官不同时期对千粒重影响的研究

1000-grain weight of wheat influenced by canopy photosynthetic organs in different growth periods

研究小麦冠层光合源叶和芒在不同生育时期对千粒重的影响 ,比较分析了上部叶、芒在子粒形成过程中的贡献及补偿能力的大小 ,着重讨论了不同时期冠层光合器官中旗叶、芒、倒二叶、倒三叶功能变化情况。结果表明 ,开花后小麦下部叶片光合功能衰退较快 ,冠层光合器官对千粒重起重要作用 ,其中旗叶作用最大 ,芒、倒二叶次之。

The 1000 grain weight of wheat influenced by canopy photosynthetic leaves and aristae in different growth periods was studied While comparison on the contribution and the capacity of supply between flag leaves and aristae were analysed The paper put emphasis on the functional transformation of the flag leaf,arista,and the second to last leaf and the third to last leaf in canopy photosynthetic organs of different growth periods The result reveals:the photosynthetic function of lower leaf in wheat declines quite quickly;canopy photosynthetic organs play an important role in the 1000 grain weight,which the function of flag leaf is most distinguished and the arista and the second to last leaf take second place