中柱鞘
关键词: 中柱鞘来源: 互联网
根和茎的中柱外围的组织。它紧接内皮层,通常由1~ 2层或多层薄壁细胞组成。也有的含有厚壁组织。中柱鞘仍保留有分生能力,由这些细胞可以形成侧根、不定根、不定芽,以及一部分形成层和木栓形成层,故中柱鞘又名“周围形成层”。但大多数的种子植物茎中缺少这一结构。
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