次生韧皮部有石细胞，次生木质部射线发达。
Sclereids are found in secondary phloem, and rays are rather rich in secondary xylem.
根的次生韧皮部则由筛胞和韧皮薄壁细胞组成。
The secondary phloem consisted of sieve cells and phloem parenchymas.
在横切面上，次生韧皮部的面积比次生木质部大得多。
In the transection section, the area of secondary phloem is much larger than secondary xylem.
内生真菌只在一定区域的皮层和次生韧皮部细胞中分布。
Endophytic fungi existed in the local cells of cork and secondary phloem in the root.
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.
维管形成层属于侧生分生组织，包括能够产生次生木质部与次生韧皮部的纺锤状形成层原始细胞和产生髓射线的射线原始细胞。
It is a lateral meristem and contains fusiform initials giving rise to secondary xylem and phloem and ray initials giving rise to medullary rays. See also secondary growth.
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.
韧皮部中主要次生代谢物质含量差异显著，木质部中单宁和黄酮的含量存在显著差异。
The secondary metabolites in the phloem of 6 poplar strains were also significantly different and tannin and flavone contents in the xylem showed significantly difference.
次生结构发生于根毛区，维管形成层由初生木质部和初生韧皮部之间的薄壁细胞转化形成；
Secondary structure occurs in the root hair zone, and vascular cambium is formed from the parenchyma cells between the primary xylem and primary phloem;
次生结构发生于根毛区，维管形成层由初生木质部和初生韧皮部之间的薄壁细胞转化形成；
Secondary structure occurs in the root hair zone, and vascular cambium is formed from the parenchyma cells between the primary xylem and primary phloem;
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