(Xylem) Xylem) 是高等植物的输导组织/ 维管组织 由 4 种不同的细胞组成: 1) 管胞(tracheids) 2) 木质导管(xylem vessels) 3) 木质部薄壁细胞(xylem parenchyma) 4) 木质部纤维(xylem fibres) 分布: 1) 根部- 位在中央，呈十字形 --> 增强被风...
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main xylem vessel 后生木质部导管
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.
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；
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.
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；
The anatomy structure photos of primal root showed the stronger drought-resistance varieties had the bigger diameter of primal root, the thicker cortex and smaller diameter of the main xylem vessel.
初生根解剖结构分析表明，抗旱性强的品种表现为初生根直径大，皮层厚，中央大导管直径小。
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