(5)中柱鞘和栓内层细胞富含
物质；
(5) Tanning materials are abundant in pericycle cells and phelloderm cells;
(5)中柱鞘和栓内层细胞富含物质；
(5) Tanning materials are abundant in pericycle cells and phelloderm cells;
The periderm is the secondary protective tissue of the rhizome, and is composed of pellem, pellogen and phelloderm;
周皮由木栓层、木栓
成层和栓内层组成；
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