《植物生理学报》 2017, 53(6): 1116-1122

叶片光能利用效率和水分利用效率对光响应的模型构建

叶子飘¹, 张海利², 黄宗安², 杨小龙¹, 康华靖^2,*

¹井冈山大学数理学院, 江西吉安343009; ²温州市农业科学研究院, 浙江温州325006

通信作者：康华靖；E-mail: kanghuajing@126.com

摘　要：

基于光合作用对光响应新模型, 以番茄(Lycopersicon esculentum)为例, 构建了叶片尺度的光能利用效率(LUE)和水分利用效率(WUE)对光响应模型, 并在此基础上比较了不同CO₂浓度(350、450、550和650 μmol·mol^-1)下番茄叶片的LUE和WUE等生理特性。结果表明: (1)光响应新模型可很好地拟合4种CO₂浓度下的番茄幼苗叶片的光合特性, 拟合值与实测值高度吻合; (2)基于光响应新模型推导的叶片LUE模型(LUE-I模型)和WUE模型(WUE-I模型)也可以很好地拟合4种CO₂浓度下的番茄幼苗叶片的LUE和WUE与光强的关系, 且拟合值同样与实测值高度吻合; (3) LUE-I模型和WUE-I模型还可分别给出相应的最大光能利用效率(LUE^max)和最大水分利用效率(WUE^max), 及其对应的饱和光强。综合本试验结果认为, 新构建的LUE-I模型和WUE-I模型对研究叶片尺度的LUE和WUE对光强的响应是可行的。

关键词：光合; 光响应新模型; 光能利用效率; 水分利用效率

收稿：2017-02-27   修定：2017-03-20

资助：国家自然科学基金(31560069)、江西省自然科学基金(20142BAB20402)和温州市重点科技创新团队项目(C20150008)。

Model construction of light use efficiency and water use efficiency based on a photosynthetic mechanistic model of light response

YE Zi-Piao¹, ZHANG Hai-Li², HUANG Zong-An², YANG Xiao-Long¹, KANG Hua-Jing^2,*

¹Maths & Physics College, Jinggangshan University, Ji’an, Jiangxi 343009, China; ²Wenzhou Academy of Agricultural Sciences, Wenzhou, Zhejiang 325006, China

Corresponding author: KANG Hua-Jing; E-mail: kanghuajing@126.com

Abstract:

At leaf level responses of light use efficiency (LUE) and water use efficiency (WUE) of Lycopersicon esculentum to light intensities (i.e. LUE-I model and WUE-I model) were developed based on a new model of light response of photosynthesis. At the same time, the LUE and WUE of tomato seedling leaves at CO₂ concentrations 350, 450, 550 and 650 μmol·mol^-1 were measured by LI-6400, and then these measured data were fitted by LUE-I and WUE-I models, respectively. The results show that (1) the new model of light-response of photosynthesis could fit well the photosynthetical characters at different CO₂ concentrations; (2) these developed models could describe well the LUE-I and WUE-I curves of tomato leaves in four CO₂ concentrations, and all the fitted parameters were in very close agreement with the measured data; (3) both LUE-I and WUE-I models not only fit well the relationship between LUE (WUE) and light intensities, but also directly give the maximum light use efficiency (LUE^max) and the maximum water use efficiency (WUE^max) and their corresponding saturation light intensities. Based on the results mentioned above, it can be concluded that both LUE-I and WUE-I models are powerful tools to study the response of LUE and WUE to light intensities and investigate on eco-physiological characteristics of plants under different environmental conditions.

Key words: photosynthesis; new model of light response; light use efficiency; water use efficiency