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A single archesporium differentiates immediately below the nucellar epidermis, it functions directly the megaspore mother cell.孢原細(xì)胞處于珠心表皮之下, 直接起大孢子母細(xì)胞的功能....

n.孢原（組織），原孢子...

archesporium的音標(biāo)：archesporium的英式發(fā)音音標(biāo)為：[ɑ:t?es'p?:r??m]archesporium的美式發(fā)音音標(biāo)為：[ɑt?es'p?r?rm]...