根的次生木质部导管大。
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.
研究紫枝忍冬茎次生木质部结构，其为环孔材。
The study on the stem secondary xylem of Lonicera maximowiczii, reveals the wood belongs to ring porous wood.
杨树木材主要指次生木质部，是主要的产品器官。
The poplar timber points the secondary xylem mainly, is a main products organ.
次生木质部由孔纹导管、薄壁组织及射线所组成。
Secondary xylem consists of pitted vessels, parenchyma fibers and rays.
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.
在领春木次生木质部中也观察到了端壁多穿孔板及侧壁穿孔板。
Multiple end wall and lateral-wall perforation plates were also observed in the secondary xylem.
处在酸性垒的原植物次生木质部组织被二氧化硅替换而成硅化木。
The secondary xylem of the original plants in local acidic environment was replaced by silica and turned into fossil woods.
在茎原生木质部和次生木质部的形成过程中可以看到这种类型的分化。
Basipetal differentiation is seen in the formation of proto-and metaxylem in the stem.
多重回归分析表明，水分和温度是影响华中五味子次生木质部解剖特征的主导因子。
The result of stepwise multiple regressions indicated that the water and temperature may be the principle factors significantly affect secondary xylem anatomical characteristics of S. sphenanthera.
运用细胞图象分析系统及显微照相的方法对柚木次生木质部导管分子进行了观察研究。
The vessel elements of secondary xylem in Tectona grandis are observed and studied by cell image analysis system and micrography.
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.
结果南方红豆杉根的次生结构由周皮和维管系统组成，次生木质部由轴向系统和径向系统两部分构成。
Results The secondary structure of the roots of Taxus chinensis var. mairei consisted of the periderm and vascular cylinder(stele). Axial and radial systems formed the secondary xylem of the roots.
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.
温室葡萄的新梢在PP 333喷施后，对其次生木质部导管细胞发育抑制作用的大小与PP 333浓度呈正比。
The inhibition of spraying PP333 on the new shoots of greenhouse grape to the development of secondary xylem cell correlated positively with the concentration of PP333.
木材（次生木质部）是树木形成层细胞分化的产物，形成层的活动方式不仅影响木材的产量，而且影响木材的结构和性质。
Wood is the product of cambial activity in trees, and the seasonal activity style of cambium directly influences wood biomass production, structures and properties.
本文对我国木兰科的39种木兰属和含笑属植物次生木质部的导管分子进行了初步分析。两属导管分子的长度和宽度略有差异。
This paper deals mainly with comparative studies on elements of secondary xylem in 39 species of Chinese Magnolia and Michelia.
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.
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.
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。
The results showed that all the cross branch roots of different sizes consisted of periderm, secondary vascular tissue and tetrarch primary xylem.
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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