The pollination drop was withdrawn into the micropyle which was later sealed by enlargement of the cells lining the micropylar canal.
英
美
花粉管在五月底穿透珠心,此时花粉管的生长缓慢,到六月上旬,花粉管快速的伸长到藏卵器颈细胞的表面。
目录
查词历史
英 汉