根刺 root thorn，root spine

互联网2013-11-14

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　　从根表面生出的尖锐突起，为叶刺和茎刺的对应词。棕榈科（ Palmae）刺根属（ Acanthorrhiza）的根刺是由露出地面的粗壮根所产生的侧根变化而成。根刺对植物体具有保护作用。

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