Protonema (pl. protonemata) The young bryophyte gametophyte that develops following spore germination.

苔藓植物中直接由孢子萌发形成的结构称为原丝体。

Macrospore metrocyte of Pinus sylvestris var. mongolica developed to female gametophyte containing female gamete-egg by a series of changes.

摘要樟子松大孢子母细胞经一系列变化，发育成雌配子体。

Rhizoid A unicellular rootlike structure found in certain algae and in the gametophyte generation of the bryophytes and some ferns.

在一些藻类、苔藓植物和裸子植物配子体中存在的由单个细胞形成的类似根的结构。