BA对花生叶片吸收^(14)C-蔗糖及其分布的影响

EFFECT OF BA ON UPTAKE OF ^(14)C-SUCROSE AND ITS DISTRIBUTION IN PEANUT LEAVES

花生叶圆片通过主动吸收和被动吸收方式吸收^(14)C-蔗糖。BA处理提高花生叶圆片对^(14)C-蔗糖的总吸收量,主要在于增加了细胞质和液泡的主动吸收和被动吸收量。BA处理促进库叶积累^(14)C-蔗糖和从标记叶(源叶)输出^(14)C-蔗糖。BA处理对花生叶片光合速率和叶绿素含量无明显影响,它的作用在于促进库叶对^(14)C-蔗糖的吸收和^(14)C-蔗糖从库叶韧皮部的卸出。

14C-sucrose was absorbed by leaves discs of peanut plant in both active and passive forms.In sink leaf treated with BA,the total uptake of 14 C-sucrose in leaf discs was enhanced by 23.9%.When 14C-sucrose was applied to the source leaf of peanut after BA smeared on the sink leaf,the 14C-sucrose accumulation at sink leaf and the 14C-sucrose export from labelling leaf were significantly enhanced.However,BA could not increase photosynthetic rate and chlorophyll content of peanut leaf.BA play the role of promoting the uptake of sucrose in the sink leaf and the export of 14C-sucrose from phloem of sink leaf.