花粉囊(pollensac), 雄蕊花药内产生花粉的囊状结构。即小孢子囊。每一花药有二个或四个花粉囊。花粉成熟时,花粉囊开裂,散出花粉。其开裂方式有:纵裂(如油菜)、横裂(如木槿)、孔裂(如茄)、瓣裂(如樟)等。 雄蕊的花药通常有4个花粉囊。花粉囊里产生花粉粒,它们是植物的雄性生殖细胞。花粉粒发育成熟时,花药裂开,散出花粉粒。
... 茶树科(山茶科) Theaceaae tea family Camelliaceae 药室;花粉囊;胞子囊;鞘;外壁 theca 心皮柄 thecaphore ...
基于8个网页-相关网页
·2,447,543篇论文数据,部分数据来源于NoteExpress
绒毡层:维管植物花粉囊内包围孢子母细胞的富含营养物质的一层结构。
Tapetum (pl. tapeta) A food-rich layer surrounding the spore mother cells in the anthers of vascular plants.
同一花药不同花粉囊相同一药室,花粉母细胞减数分裂和小孢子的发育,并不是高度同步的。
It is not synchronous highly that the meiosis of pollen mother cells and the development of microspore in the same anther but different pollen sac and in the same anther chamber.
在存在大量食草动物的同时却只有少量的水藻花粉囊,这暗示出但没能证明食草动物已吞噬了大部分水藻。
A low number of algal cells in the presence of a high number of grazers suggested, but did not prove, that the grazers had removed most of the algae.
应用推荐