prothallus

基本解释

• n.原叶体

同根派生

英汉例句

• 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。
• In homosporous plants, there is only one type of prothallus with both male and female sex organs.
  在具同形孢子的植物中，只有一种雌雄性器官兼备的原叶体类型。
• 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。
• 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。
• 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。