prothallus

prothallus

1. Prothallus (pl. prothalli) A flattened disk of cells that forms the free-living haploid gametophyte generation of certain ferns, e.g.Dryopteris.

原叶体：一种扁平的叶状体，它是某些蕨类植物的能独立生活的单倍性配子体，如鳞毛蕨属。

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. They indicated that adult prothallus with hairs, bifurcate rhizina and curve archegonium are some the evolution characteristic.The paper preliminary discusses its taxonomic significance.

研究表明龙头节肢蕨的配子体发育过程中出现毛状体，假根分叉，颈卵器弯曲等进化特征，并对其分类学意义初步讨论。

4. Changes of the Microtubule Arrays During Mitosis in Prothallus Cells of Dryopteris crassirhizoma

粗茎鳞毛蕨原叶体细胞有丝分裂过程中微管列阵的变化

5. Archegonial neck usually inclines or curves towards the base of the prothallus at maturity.

颈卵器成熟后，颈部常向原叶体基部倾斜或弯曲。