摘要
【目的】比叶重是叶片经济谱功能性状关系网络中的核心指标,受到各种环境因素的影响。但是,植物不同部位叶片间存在的系统调控如何影响比叶重的变化尚不清楚。【方法】本研究通过田间密度试验和室内遮荫试验,测定棉花不同部位叶片的比叶重及其组织结构性状,分析比叶重和组织结构性状之间的关系以及影响比叶重的因素。【结果】改变棉花下部叶片所处的光环境,会影响其叶片厚度、栅栏组织厚度、叶片结构紧密度和叶片结构疏松度,从而导致比叶重的变化。同时,由于系统调控的作用,上部叶片的结构特征表现出与下部叶片类似的变化趋势。栅栏组织厚度对不同部位叶片比叶重的影响最为显著。【结论】棉花上部叶片比叶重的变化受下部叶片所处光环境的系统调控;在系统调控下棉花叶片比叶重的变化主要受栅栏组织厚度的影响。
[Objective]Leaf mass per area(LMA)is the core index of functional trait relationship network in leaf economic spectrum,which is affected by various environmental factors.However,the effects of systemic regulation on the variation of LMA at different positions of leaves in plant are not clear.[Method]In this study,LMA and tissue structure character of leaves at different positions in cotton were measured by field density experiment and indoor shading experiment.The relationship between LMA and different parts of tissue structure character,and respective influencing factors were analyzed.[Result]Leaf thickness,palisade tissue thickness,cell tense ratio and spongy ratio were affected after the change of light environment at the lower leaves of cotton,which resulted in the variation of LMA.Meanwhile,the structural characteristics of top leaves showed similar trend to lower leaves due to the systematic regulation.The palisade tissue thickness had the most significant effect on LMA in leaves at different positions.[Conclusion]The variation of LMA of top leaves in cotton is controlled by the light environment of lower leaves,and the variation of LMA of cotton leaves is mainly affected by palisade tissue thickness under the systematic regulation.
作者
孟浩峰
雷长英
张旺锋
张亚黎
Meng Haofeng;Lei Zhangying;Zhang Wangfeng;Zhang Yali(College of Agronomy,Shihezi University/The Key Laboratory of Oasis Eco Agriculture of Xinjiang Production and Construction Corps,Shihezi,Xinjiang 832003,China)
出处
《棉花学报》
CSCD
北大核心
2021年第2期144-154,共11页
Cotton Science
基金
国家自然科学基金(31860355)
石河子大学青年创新人才项目(CXRC201701)。
关键词
棉花
比叶重
叶片结构
系统调控
cotton
leaf mass per area
leaf structure
systematic regulation
