树木遗传发育分享 http://blog.sciencenet.cn/u/buffer

博文

光照强度影响分生组织活动

已有 1251 次阅读 2018-10-27 19:23 |个人分类:植物之美|系统分类:科研笔记

Suppression of growth and death of meristematic tissues in Abies sachalinensis under strong shading: comparisons between the terminal bud, the terminally lateral bud and the stem cambium

作者:Yasuda, Y (Yasuda, Yuko)1 ] Utsumi, Y (Utsumi, Yasuhiro)2 ] Tan, XF (Tan, Xianfang)1 ] Tashiro, N (Tashiro, Naoaki)2 ] Fukuda, K (Fukuda, Kenji)3 ]Koga, S (Koga, Shinya)2 ]


JOURNAL OF PLANT RESEARCH


卷: 131 

期: 5 页: 817-825

DOI: 10.1007/s10265-018-1051-8

出版年:SEP 2018

文献类型:Article


摘要

The suppression of apical growth and radial trunk growth in trees under shade is a key factor in the competition mechanism among individuals in natural and artificial forests. However, the timing of apical and radial growth suppression after shading and the physiological processes involved have not been evaluated precisely. Twenty-one Abies sachalinensis seedlings of 5-years-old were shaded artificially under a relative light intensity of 5% for 70 days from August 1, and the histological changes of the terminal bud and terminally lateral bud of terminal leader and the cambial zone of the trunk base were analyzed periodically. In shade-grown trees, cell death of the leaf primordia in a terminal bud of terminal leader was observed in one of the three samples after 56 and 70 days of shading, whereas the leaf primordia in a terminal bud of terminal leader in all open-grown trees survived until the end of the experiment. In addition, the leaf primordia of the terminally lateral buds of terminal leader retained their cell nuclei until the end of the experiment. No histological changes were observed in the cambial cells after shading, but the shade-grown trees had less cambial activity than the open-grown trees through the experiment. Strong shading appeared to inhibit the formation and survival of cells in the terminal bud of terminal leader rather than the terminally lateral buds of terminal leader and the cambium. The suppression of the terminal bud growth and elongation of the surviving lateral buds would result in an umbrella-shaped crown under shade.


关键词:Abies sachalinensisCambiumLeaf primordiaShadeTerminal budTerminally lateral bud




http://blog.sciencenet.cn/blog-39748-1143103.html

上一篇:来吧,咱们建立下师生关系
下一篇:Sector analysis reveals patterns of cambium differentiation

0

该博文允许注册用户评论 请点击登录 评论 (0 个评论)

数据加载中...

Archiver|手机版|科学网 ( 京ICP备07017567号-12 )

GMT+8, 2020-7-12 12:27

Powered by ScienceNet.cn

Copyright © 2007- 中国科学报社

返回顶部