玉米功能叶片碳同化物在果穗不同部位籽粒中的分配

STUDY ON REAATIONSHIP BETWEEN THE DEVOLOPMENT OF KERNELOF MAIZE AND DISTRIBUTION OF 14C-ASSIMILATE FROM FROM FUNCTIONAL LEAVES

利用￣（１４）Ｃ示踪法研究玉米灌浆期功能叶￣（１４）Ｃ－光合产物在果穗籽粒间的分配。结果发现，饲喂功能叶半片叶时，￣（１４）Ｃ－光合产物在果穗各行籽粒中的分布是不均匀的，￣（１４）Ｃ－光合产物的量在一半果穗中较高，在另一半果穗中较低，有所谓的“半侧分布”现象。当剪掉半片叶再饲喂另外半片叶时，￣（１４）Ｃ－光合产物在果穗各行籽粒中的分布仍有“半侧分布”现象。

A study on distribution of ￣14C-assimilate from functional leaves in kernel of maize atfilling stage was carried out. The results indicated that distribution of ￣14C-photosyntheticproducts in kernel of each row of ear is uniform when half leaf fed with ￣14CO2. The contentof 14C-assimilate in half ear was higher and in another ear lower, showing so called “half-side distribution”of ￣14C-assimilate in ear. When half leaf fed with ￣14CO2 and another halfleaf cut,the “half-side distribution”of ￣14C-assimilate in kernel of maize ear still existed.