黄瓜雄花形成过程中心皮的发育

黄瓜(Cucumis sativus L)为重要的经济作物，雌雄同株异花，是研究植物性别分化的经典材料。人们对黄瓜性别分化进行了广泛的研究。Astmon和Galun，任吉君和王艳对黄瓜性别分化的形态特征和器官发生进行了初步研究，表明黄瓜单性花分化和发育过程中经历了无性期、两性期和单性期，最

Carpel development in male flowers of cucumber (Cucumis sativus. L)]

Carpel development in cucumber male flowers was studied by morphological, histochemical and isoenzyme electrophoretic analyses. The results showed that: (1) cell number of the carpel in male flowers increased continuously during the development of male flowers, and the carpel in male flowers was abundant in RNA content; (2) the carpel in male flowers at latter developmental stage was differentiated, and a placenta-like structure was formed in the carpel of male flowers during anthesis, while the ovule did not appear as that of mature female flowers; (3) The POD and esterase isoenzyme electrophoretic profiles of carpel varied from the development of male flowers, which further indicated that the carpel in mature male flowers was no longer at the stage of primordium. It could be deduced from the results that carpel of cucumber male flowers develops continuously in a distinct pattern with that of female flowers during sex expression process.