包括根或茎的维管组织及相关薄壁组织，若有维管束鞘和内皮包被则这二者也属于中柱结构。
Stele the vascular tissue and associated parenchyma tissue and (if present) the surrounding pericycle and endodermis of a stem or root.
该植物茎与根茎的构造相似，均有表皮、皮层、淀粉鞘、周维纤维、六束维管束、髓及髓射线。
Having the epidermis, cortex, starch sheath, perivascular sclerenchyma, six vascular bundles, pith and pith ray, the stem is similar to the root in their structure.
尽管薇甘菊叶片为典型C3植物特征，结果发现了茎以及主叶脉内存在类似C4途径的、具有丰富叶绿体的维管束鞘结构。
Although leaf photosynthesis of this weed is of the C3 type, a C4-like vascular bundle full of chlorophyll was observed in the main vein of the leaf and young stems.
茎的初生结构中多个维管束排列成环状，节部为单隙三迹，叶迹分别来自于3条维管束或同一条维管束。
The vascular bundles of the primary structure in stem are ring arranged, and the node is unilacunar and 3-traced, which is from three vascular bundles or one vascular bundle.
维管形成层向两侧延伸直至形成一个茎内的分生组织环，各个维管束被束间形成层联系在一起。
The vascular cambium extends to form a complete ring of meristematic tissue around the stem, the separate vascular bundles being linked by interfascicular cambium.
这种维管束斜生于茎内的部分，称为叶迹。
These parts of bundles in the stem be regarded as leaf trace.
茎的初生维管束中有3大束和5～7小束，两个大维管束之间夹有2～3个小维管束，所有维管束在茎的横切面上呈环状排列；
There were 3 big vascular bundles and 5~7 small vascular bundles in young stem, and there were 2~3 small vascular bundles between two big vascular bundles, they were all arranged in circularity.
茎中维管束环外有糊粉层。
There is the aleurone layer outside the bundle ring of the stems.
茎中维管束环外有糊粉层。
There is the aleurone layer outside the bundle ring of the stems.
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