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地下茎

地下茎为一种变态茎,是土表面下茎的统称,相对于地上茎,其外形肥大且常呈水平走向;功能是作食物和营养的储存组织、新殖株(克隆)的无性繁殖、多年化而帮助越冬耐旱。依型态可分为:根茎块茎球茎鳞茎

地下茎与根的的功能虽然都作为养分的贮存处,但地下茎仍具茎的特征,有芽与节的构造(马铃薯的节为芽眼)及不定根,甚或叶痕。


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地下茎
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