作物学报2000，Vol.26Issue(2)：190-194,5.
小麦开花后光合物质在不同穗位间的分配及其与穗粒重的关系
Distribution of Photoassimilate to Different Parts of Wheat Ear after Anthesis and Its Relation to Kernel Weight Per Ear
贺明荣 1王振林 1张杰昌2
作者信息
- 1. 山东农业大学,山东泰安,271018
- 2. 山东聊城农业学校,山东聊城,252000
- 折叠
摘要
Abstract
Four cultivars representing large and small kernel size cultivars were used in this study. The effects of removal of the top two spikelets on photosynthetic rate, distribution of 14C assimilate and ear traits were investigated. When the top two spikelets were removed, the photosynthetic rate of the small kernel cultivars (Lumai 14 and Shannong 48-2)at the middle and late phase of grain filling increased, while that of the large kernel cultivars (Lu 215953 and Hesheng 2) decreased. Test of the 14C assimilate labelled at the beginning of the grain filling stage revealed that removal of the top two spikelets could cause a slight increase over the control, but the pattern of distribution of the assimilate to different parts of the ear altered significantly.Thus, The middle, especially the basal spikelets received much more assimilate than the control. All these lead to a reduction of the number of sterile spikelets, and increase of seed setting, 1000-kernel weight and kernel weight per ear. It was suggested therefore that by means of enchancing translocation of photoassimilate into the middle, especially the basal spikelets during the early period of kernel development, kernel weight per ear could be increased efficiently.关键词
小麦/光合物质/分配/穗粒重Key words
Wheat/Photoassimilate/Distribution/Kernel weight per ear分类
农业科技引用本文复制引用
贺明荣,王振林,张杰昌..小麦开花后光合物质在不同穗位间的分配及其与穗粒重的关系[J].作物学报,2000,26(2):190-194,5.
