Effect of Weak Light on the Photoassimilates Distribution and Transformation of Young Grape Plants  

作　　者：ZHAN Ji-cheng, HUANG Wei-dong and WANG Li-jun(College of Horticultural Sciences , China Agricultural University, Beijing 100094 , P. R . China) 

出　　处：《Agricultural Sciences in China》2002年第9期1006-1011,共6页中国农业科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(30070531).

摘　　要：The effect of weak light on the photoassimilates distribution and transformation of young Jingyu grape plants ( Vitis vinefera L. cv. Jingyu) were studied by shading. Compared to the grape grown under natural light intensity environment, the net photosynthetic rate diurnal variation curve of experimental plants grown in weak light intensity environment was remarkably lower. Its leaf and stem biomass ratio increased when light intensity decreased, the root and new shoot biomass ratio showed an opposite trend. The 14 C-photoassimilates was mostly distributed to young leaves and stem, a little was distributed to root. The metabolism of 14C-photoassimilates distributed to the entire grape body were also changed under weak light intensity environment.The effect of weak light on the photoassimilates distribution and transformation of young Jingyu grape plants ( Vitis vinefera L. cv. Jingyu) were studied by shading. Compared to the grape grown under natural light intensity environment, the net photosynthetic rate diurnal variation curve of experimental plants grown in weak light intensity environment was remarkably lower. Its leaf and stem biomass ratio increased when light intensity decreased, the root and new shoot biomass ratio showed an opposite trend. The 14 C-photoassimilates was mostly distributed to young leaves and stem, a little was distributed to root. The metabolism of 14C-photoassimilates distributed to the entire grape body were also changed under weak light intensity environment.

关 键 词：Weak light Net photosynthetic rate(Pn) Biomass partition Photoassimilates distribution Photoassimilates transformation 

分 类 号：S663.1[农业科学—果树学]