在茎的次生结构中皮层与韧皮部之间有一层扁平形细胞；
There is a layer of compressed cells in the secondary structure of stem.
根状茎的次生结构由外向内为表皮，皮层和维管柱，髓射线发达。
The secondary structure of rhizome include epiderm, cortex and vascular tissue, pith ray is developed.
利用滑走切片技术和显微镜的手段观察了木兰科一年生茎的次生结构特征。
The secondary structure of annual stem of 6 genera (12 species) from Magnoliaceae of China is described.
地下茎加粗过程中形成三生结构，其异常结构是由于次生韧皮部外侧发生的额外形成层所致，其起源于薄壁细胞；
The growth of hypogeal stem contain tri-growth, and the anomalous secondary growth is the result of supernumerary cambium that derived from the outmost elements of secondary phloem.
茎具有明显的次生结构。
简述根与茎次生结构的区别？
Describe the difference of secondary structure between root and stem.
实验结果表明：阳生环境和阴生环境水蜡树叶片、幼茎、次生木质部的结构存在差异。
The results showed that there were differences in the structure of leaves, caulicle andsecondary xylem of L. obtusifolium Sieb. et Zucc. lived in shade and sun environment.
实验结果表明：阳生环境和阴生环境水蜡树叶片、幼茎、次生木质部的结构存在差异。
The results showed that there were differences in the structure of leaves, caulicle andsecondary xylem of L. obtusifolium Sieb. et Zucc. lived in shade and sun environment.
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