microsporangium造句
1. Meiotic division of microsporocyte develops synchronously in each microsporangium of an anther.
2. At microsporogenous tissue stage, the microsporangium wall could be recognized as epidermis, middle layer and tapetum from outside to inner.
3. The present paper firstly reports the development of microsporangium, male gametophyte, megasporogenesis , female gametophyte and embryogeny in Swertia erythrosticta Maxim.
4. It was found that the callose component initially occurred at late sporogenous cells stage in the cells located in center of microsporangium, and late extended towards the cells lying at its two ends.
5. The primary sporogenous cells functioned directly as microspore mother cells and were arranged in a single row in a microsporangium.