The prothalli are saprophytic, irregularly branched, subterranean bodies . 原叶体是腐生的,不规则分枝的地下体。
2.
In vascular plants the diploid sporophyte is the dominant phase and in the ferns , for example , the gametophyte is a small prothallus 在维管植物(蕨类)中二倍体的孢子体占生活史的主要部分,配子体仅为原叶体。
3.
In many gymnosperms the nuclei divide within the pollen grain to produce a small number of cells ( 2 - 40 depending on the group ) representing the male prothallus 在许多裸子植物中,细胞核在花粉粒中分裂以产生少量的细胞( 2 40个,取决于不同种类) ,代表雄性原叶体。