Protonema

A protonema (plural: protonemata) is a thread-like chain of cells that forms the earliest stage (the haploid phase) of a bryophyte life cycle. When a moss first grows from the spore, it grows as a protonema which develops into a leafy gametophore.

Hornworts do not have a protonemal stage, the spores germinate directly into a new Gametophyte generation.

单词	Protonemata
释义	Protonemata 英语例句库 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。英语百科 Protonema A protonema (plural: protonemata) is a thread-like chain of cells that forms the earliest stage (the haploid phase) of a bryophyte life cycle. When a moss first grows from the spore, it grows as a protonema which develops into a leafy gametophore. Hornworts do not have a protonemal stage, the spores germinate directly into a new Gametophyte generation.
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Protonemata

Protonema