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单词 prothalloid
释义

prothallus /prō-thalˈəs/ or prothallium /prō-thalˈi-əm/

noun (pl prothallˈī or prothallˈia)
  1. The gametophyte or sexual generation in ferns and related plants, a small plate of tissue derived from a spore and bearing antheridia and archegonia
  2. The homologous stage in gymnosperms
ORIGIN: Gr pro before, and thallos a young shoot

prothallˈial, prothallˈic or prothallˈoid adjective

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更新时间:2024/12/23 1:41:27