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栓内层 [shuān nèi céng]
cork cortex
[植] phelloderm
[植] phelloderm
- 生长龄不同，额外形成层、栓内层的宽度和细胞大小不同。
Roots are different in the width of supernumerary cambium and phelloderm and the cell. - 木栓形成层不断向内分裂分化成栓内层，此时可称次生皮层。
The cells of the phellogen towards outside differentiate as phellem, and towards inside as phelloderm or secondary cortex. - 结果：根横切面上栓内层的石细胞环带和次生木质部导管的排列方式、初生木质部为四原型等为显微鉴别特征；
Results:The circular belt of sclereids in the phelloderm, secondary xylem vessel order of the transverse section, and tetrarch of the primary xylem were microscopic characters.
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