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附着和分离的香叶片中的光合作用参数和口腔导电性

Matthew E Akalusi¹, Fan-Rui Meng¹, Charles P-A Bourque¹

¹Faculty of Forestry and Environmental Management University of New Brunswick Fredericton NB Canada.

Plant-environment interactions (Hoboken, N.J.)

|June 7, 2023

概括

脱离的树枝提供可靠的叶子气交换测量,特别是在寒冷的月份. 脱落不会显著影响光合作用或口腔导电性,验证了这种方法用于树冠研究.

科学领域:

植物生理学植物生理学
森林生态森林生态
环境科学环境科学

背景情况:

进入高树冠以进行叶子气交换测量是具有挑战性的.
脱落的叶子可能会改变生理反应,质疑在脱落的样本上测量的有效性.
评估脱离分支的气体交换特性对于方法验证至关重要.

研究的目的:

评估使用分离的树枝用于香 (Abies balsamea) 中气交换分析的可行性.
为了比较附着和分离的分支之间的光合作用参数和口腔导电性.
为了确定分支脱落对关键生理测量的影响.

主要方法:

叶子气交换测量是在香树的附着和分离的树枝上进行的.
分析了光合作用参数 (A 400,Vcmax,Jmax,Jmax:Vcmax) 和口腔导电量 (gs).
使用线性混合效应模型分析数据,考虑分支机构的状态和测量月.

主要成果:

树枝脱落对光合作用 (A400),Vcmax,Jmax,Jmax:Vcmax或口腔导电 (gs) 没有显著影响.
在所有测量的气交变量中观察到显著的季节性效应.
测量脱落的树叶需要仔细考虑,特别是在温暖的夏季.

结论:

脱离的枝 (50-80厘米) 适用于可靠的气交换测量.
在较凉爽的生长季节月份,在脱落后30分钟内,测量最可靠.
这种方法为研究高树的气体交换提供了可行的替代方案.

关键词:

香杉生理学生理学二氧化碳是二氧化碳的一种物质.脱落的叶片脱落的叶片光合作用反应的反应.声管导电性声管导电性声管导电性

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