内皮层有胚植物皮层的最内层,皮层维管柱之间以内皮层为界。内皮层由细胞组成。有些植物的内皮层积聚较多的淀粉粒[1]内皮层的径向壁内都布满了疏水性物质,这些物质统称为凯氏带[2] 大多数种子植物以及木本植物的根中有内皮层,但它们的茎中没有内皮层。

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