Tapetum (pl. tapeta) A food-rich layer surrounding the spore mother cells in the anthers of vascular plants.
维管花粉囊内包围孢
母细胞
富含营养
质
一层结构。
Tapetum (pl. tapeta) A food-rich layer surrounding the spore mother cells in the anthers of vascular plants.
维管花粉囊内包围孢
母细胞
富含营养
质
一层结构。
Ferns were the first terricolous vascular plants, and still comprise an important part of primary productivity of ecosystems.
蕨类是最早
陆
维管
,至今仍然是生态系统初级生产力
重要组成部分。
The carpel is homologous with the megasporophylls of certain spore-bearing vascular plants (pteridophytes) and the ovuliferous scales of gymnosperms.
心皮和能产生孢维管
(羊齿类)还有具胚珠
大孢
叶是同源
。
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