periderm

About 15 days after girdling, a cork cambium developed near the surface of callus, then developed normal periderm rapidly.

大约15天左右在愈伤组织近表面细胞中发生木栓形成层，以后迅速形成正常的周皮。

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the biennial rhizome of d. zingiberensis is composed of three parts: the periderm, the ground tissue and the vascular bundle.

盾叶薯蓣的二年生根状茎主要由三部分组成：周皮、基本组织和散生在基本组织中的维管束。

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The results showed that all the cross branch roots of different sizes consisted of periderm, secondary vascular tissue and tetrarch primary xylem.

结果表明：不同直径大小的横走侧根均由周皮、次生维管组织和四原型的初生木质部构成。

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While for older roots, there are periderm, secondary phloem, cambium, secondary xylem and primary xylem. In root, the duct caliber of xylem in Akebia quinata ( Thunb.) Decne.

老根由外向内依次为：周皮、次生韧皮部、形成层、次生木质部、初生木质部。在根中五叶木通木质部导管口径比三叶木通的大很多。

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Therefore, the secondary structure included periderm, pericyclic parenchyma tissue and secondary vascular tissue from the outside to the inside of taproots of Bupleurum chinense DC.

因此，北柴胡根的次生结构从外到内由周皮、中柱鞘薄壁细胞环和次生维管组织组成。

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The former two mechanisms gave only temporary protection to the tapping cut and the cut could not be protected completely and efficiently until the wound periderm was finally formed.

前两种防卫机制的作用是暂时的，只有最后创伤周形成时，树皮伤口才能得到充分有效的保护。

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