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....

n.孢原（组织），原孢子...

archesporium的音标：archesporium的英式发音音标为：[ɑ:tʃes'pɔ:rɪəm]archesporium的美式发音音标为：[ɑtʃes'pɔrɪrm]...