桔梗繁殖器官的动态发育研究

Studies on dynamic development of reproductive organs in Platycodon grandiflorum

利用植物解剖技术研究了桔梗的花药、花柱和子房的结构,其观察结果表明:桔梗花药5枚,每个花药4个花粉囊,外侧的花粉囊较内侧的发育快,随着花药的发育,每个花粉囊内有一个乳突生长,达到花粉囊中部,药隔形成中空,然后花粉囊远轴面内陷,与乳突靠近;花柱为开放型,5裂,花柱道细胞发达;子房为中轴胎座,5室。

studied on anther,style and structure of the ovary by Use of plant anatomy , the observation results show that ： The flower of Platycodon grandiflorum has five anthers, each anther comprises four microsporangia, outside development more quickly than inner , with the development of anther, there is a papillary growth until reaching the central antherin in each microsporangia, connective tissues formation of hollow, and then microsporangia abaxial surface invagination, with around mastoid; hollow style, 5 cleft, stylar canal eells developed; ovary placenta to the central axis, 5 rooms.