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

1.苔藓植物中直接萌发形的结构称为原丝体。

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

2.摘要樟松大母细胞经一系列变化，发育体。

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

3.在一些藻类、苔藓植物和裸植物体中存在的单个细胞形的类似根的结构。