春玉米植株体中蔗糖含量的变化

本试验对春玉米的叶片、叶鞘、茎秆和雌雄穗等器官的蔗糖含量的变化进行了分层次的系统研究.结果表明,随着春玉米生长发育进程,叶片、叶鞘蔗糖含量变化为二次多项式模型,茎秆为三次多项式模型,而雌穗呈单峰曲线变化.茎与雌穗之间蔗糖浓度的差异是子粒灌浆的内在动力之一.下部叶片的光合产物在生长发育前期起主导作用,上、中部叶片则在后期起主导作用,两部分光合产物均参与子粒生长发育.

The Changes of Sucrose Content in Spring Maize Plant

The changes of sucrose content were systematically studied in the blade, blade sheath, stem, tassel and ear of spring maize according to its distribution in different organs in this experiment. As a result, with the growth of spring maize, the change of sucrose content shows a duality regression model in the blade and blade sheath, cubic regression model, and a single peak curve in female ear. The difference of sucrose content in both stem and female ear is one of the internal powers for filling kernels. Products of photosynthesis in low-leaves play a leading role in early period of growing, while the products in top and middle-leaves play a leading role during the late period of development. Both products of photosynthesis participate in the kernel growing and developing.