元江箭竹维管束及韧皮部纤维细胞壁发育过程  

Developmental Process of the Vascular Bundles and Phloem Fiber Wall in Fargesia yuanjiangensis

作　　者：何文志[1] 王曙光[1] 邓琳[1] 牛兆辉[1] 詹卉[1] 

机构地区：[1]西南林业大学生命科学学院,云南昆明650224

出　　处：《西北林学院学报》2017年第3期225-232,共8页Journal of Northwest Forestry University

基　　金：国家自然科学基金(31560196)

摘　　要：通过对5个不同龄级元江箭竹秆中维管束和导管形态结构进行观察,对韧皮纤维细胞壁厚度和层数进行分析,总结元江箭竹韧皮部纤维细胞壁的发育变化特征,建立纤维细胞壁增厚的相关模型。结果表明,元江箭竹维管束的长度和长宽比随秆龄的增长而先增大后显著减小,后生导管直径与维管束宽度随秆龄的增长而增大。细胞壁层数和厚度随秆龄的增加而增加。在成熟的元江箭竹秆中有6种纤维细胞类型,其中TypeⅡ所占比例最多。The morphological characteristics of vascular bundles and metaxylem vessels were observed in Fargesia yuanjiangensis culms, and the wall thickness and layers of phloem fibers were also analyzed, so as to summarize their developmental characteristics and to establish the fiber wall deposition pattern. The re- suits showed that the length and length/width ratio of F. yuanjiangensis vascular bundles increased firstly with age and then decreased significantly, while the diameter of metaxylem vessels increased with age as well as the width of the vascular bundles. There were six fiber types in the mature F. yuanjiangensis culms,among which type II accounted for the highest proportion.

关 键 词：元江箭竹 维管束 纤维细胞壁 纤维细胞类型 发育过程 

分 类 号：S795.2[农业科学—林木遗传育种]