性分化和性表现 黄瓜的花芽一般是在生长点以下3一4节的叶芽腋部形成原基。花有雄花、雌花和两性花,但是那一种花芽的初期发育都是相同的。继萼片、花瓣形成之后,以向心方式形成雄蕊和雌蕊的原基。随即在构成雄花的花芽中雌蕊停止发育而雄蕊发达。成为雌花花芽的雄蕊停止发育而 Sexual Differentiation and Sexual Performance Flower buds of cucumbers are generally primordial in the axillary buds of the leaf buds below the growing point. Flowers have male, female and bisexual flowers, but the initial development of that flower bud is the same. Following the sepals, petals formed, the centripetal formation of stamens and pistil primordia. The pistils then stop developing and the stamens develop in flower buds that make up the male flowers. Stamens that become female flower buds stop growing