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元江箭竹维管束及韧皮部纤维细胞壁发育过程

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

Fargesia yuanjiangensisvascular bundlefiber cellfiber cell typedevelopmental process

何文志、王曙光、邓琳、牛兆辉、詹卉

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西南林业大学生命科学学院,云南昆明650224

元江箭竹 维管束 纤维细胞壁 纤维细胞类型 发育过程

国家自然科学基金

31560196

2017

西北林学院学报
西北农林科技大学

西北林学院学报

CSTPCDCSCD北大核心
影响因子:1.078
ISSN:1001-7461
年,卷(期):2017.32(3)
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