土洋参叶片保卫细胞及其叶绿体发育研究

土洋层各层闪叶片间保卫细胞大小及叶绿体数目差异显著，保卫细胞及其叶绿体随叶片发育而发育，均可分为幼，成，老３时期；顶叶叶片小，保卫细胞较小，保卫细胞中叶绿体较少，中部叶较大，保卫细胞较大，叶绿体较多，基部叶衰教材老萎缩，保卫细胞及叶绿体各减。

STUDIES ON THE DEVELOPMENT OF THE GUARD CELL AND CHLOROPLAST OF THE TALINUM PANICULATUM LEAF

The size of guard cells and the number of chloroplasts in different ranks of Talinum paniculatum leaves are greatly diffrent. The development of the guard cell and chloroplast is in good line with the leaf development,and can be divided into three stages:the initial,mature and senescient stages.The tender top leaves are relatively small and have smaller guard cells and fewer chloroplasts;the mature rank of leaves are bigger than the top leaves and have bigger guard cells and more chloroplasts;in the senescient leaves the guard cells are slightly smaller than those in the mature leaves and so is the number of the chloroplasts.It is clear that the bigger the guard cells ,the greater number of chloroplasts is.However,there is no marked corelation between the number of chloroplasts and the size of guard cells.The guard cells in a leaf do not develop synchronously.The difference between the number of chloroplasts in a pair of guard cells in a stoma is not eminent.