megaspore的音标：megaspore的英式发音音标为：['megəspɔ:]megaspore的美式发音音标为：['megəˌspoʊr]...

A single archesporium differentiates immediately below the nucellar epidermis, it functions directly the megaspore mother cell.孢原细胞处于珠心表皮之下, 直接起大孢子母细胞的功能.Megaspore tetrad is linear. The chalazal megaspore develops into a...

n.大孢子，（种子植物的）胚囊...