Progress in the Death Mechanism Research of Paulownia spp. Terminal Buds | 泡桐顶芽死亡机制研究进展
2013
Wang Yanmei, Henan Agricultural University, Zhengzhou (China),College of Forestry | Ma Tianxiao, Huanghe Sciece and Technology College, Zhengzhou(China) | Liu Zhen, Henan Agricultural University, Zhengzhou (China),College of Forestry
chinois. 幼年期泡桐顶芽越冬死亡,翌年多利用侧芽以假二叉分枝的形式生长,造成＂冠大干低＂,严重影响桐材产量与质量。了解泡桐顶芽死亡的原因、机理及研究进展,对木本植物芽研究具有重要的理论意义与应用价值。本文对可能导致泡桐顶芽死亡的原因及机制进行综述,重点阐述泡桐顶芽死亡与顶芽生长发育状况、温度、水分、光周期、平埋、内源激素及程序性死亡之间的关系,并对引起泡桐顶芽死亡若干亟待解决的问题进行讨论。
Afficher plus [+] Moins [-]anglais. The terminal buds of young Paulownia spp. are predisposed to dead over winter. Thus,a false dichotomous branch is the main trunk extension form in the following year,which brings about ＂big crown-low trunk ＂and seriously affects the productivity and wood quality. It is important in both theory and application to understand the death reasons and mechanisms. The possible death reasons and mechanisms were reviewed in this paper,and the emphases were put on the factors that the terminal bud growth and development status,temperature,water,light,programmed cell death and endogenous hormonal changes associated with the terminal bud death. Finally,certain urgent problems about Paulownia spp. terminal bud death are put forward and discussed.
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