根的次生木质部导管大。
SKC1在木质部导管周围的薄壁细胞特异表达。
SKC1 is preferentially expressed in the parenchyma cells surrounding the xylem vessels.
环状加厚：原生木质部导管和管胞的内层环状増厚。
Annular thickening rings of thickening laid down on the inner wall of protoxylem vessels and tracheids.
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.
木质部导管呈放射状排列，但年轮状不明显。防风栽培品根横切面韧皮部油管10～11轮；
While cultivated Radix Saposhnikovia had phloem transverse section of root with oil tube lining up 10-11 rings and xylem vessel with distinct annual ring.
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.
导管结构与树干生长、干胶产量关系的不确定性说明，木质部导管结构不是影响橡胶树生长势和产量的主要因子。
The undefined correlations between vessel structural characters and growth and yield suggested that the vessel character was not the main factor affecting the growth and rubber yield.
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.
利用偏光显微镜和明场显微镜，首次报道了模式植物金鱼草幼苗初生维管系统木质部导管分子的发育、形成和连接过程。
The process of vessel element ' s promotion, formation and connection in primary xylem of antirrhinum majus, a model plant, was observed through micropolariscope and bright - field microscope.
不同部位的木质化的程度不同，原生木质部中只有轻微的加厚，而在厚壁组织和一些木质部导管中则进一步加厚，平均含25%-30%的木质素和50%的纤维素。
The degree of lignification varies from slight in protoxylem to heavy in sclerenchyma and some xylem vessels, but values of 25-30% lignin and 50% cellulose are average.
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.
可在原生木质部和初始后生木质部的管胞和导管中见到。
It is found in protoxylem and first metaxylem tracheids and vessels.
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.
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.
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