Mesophyll conductance limitation of photosynthesis in poplar under elevated ozone

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Mesophyll conductance limitation of photosynthesis in poplar under elevated ozone
	Xu, Yansen ; Feng, Zhaozhong ; Shang, Bo ; Dai, Lulu ; Uddling, Johan ; Tarvainen, Lasse
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-03-20
卷号	657 页码:136-145
关键词	Carboxylation Mesophyll conductance Ozone Poplar Photosynthesis Stomatal conductance
ISSN号	0048-9697
英文摘要	Finite mesophyll conductance (g(m)) reduces the rate of CO2 diffusion from the leaf intercellular space to the chloroplast and constitutes a major limitation of photosynthesis in trees. While it is well established that g(m) is decreased by stressors such as drought and high temperature, few studies have investigated if the phytotoxic air pollutant ozone (O-3) affects g(m). We quantified the relative importance of three different types of limitations of photosynthesis in poplar trees exposed to elevated O-3: decreases in stomatal conductance, g(m) and biochemical photosynthetic capacity. The O-3-induced reductions in light-saturated net photosynthesis were linked to significant declines in g(m) and biochemical photosynthetic capacity (in particular carboxylation). There was no significant effect of O-3 on stomatal conductance. Of the O-3-induced limitations on photosynthesis, g(m) limitation was by far the most important (-16%) while biochemical limitation (-8%) was rather small. Both limitations grew in magnitude over the study period and varied in response to leaf-specific O-3 exposure. Our findings suggest that declines in g(m) may play a key role in limiting photosynthesis of plants exposed to elevated O-3, an effect hitherto overlooked. (C) 2018 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42754]
专题	生态环境研究中心_城市与区域生态国家重点实验室
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 3.Univ Gothenburg, Dept Biol & Environm Sci, SE-40530 Gothenburg, Sweden
推荐引用方式 GB/T 7714	Xu, Yansen,Feng, Zhaozhong,Shang, Bo,et al. Mesophyll conductance limitation of photosynthesis in poplar under elevated ozone[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,657:136-145.
APA	Xu, Yansen,Feng, Zhaozhong,Shang, Bo,Dai, Lulu,Uddling, Johan,&Tarvainen, Lasse.(2019).Mesophyll conductance limitation of photosynthesis in poplar under elevated ozone.SCIENCE OF THE TOTAL ENVIRONMENT,657,136-145.
MLA	Xu, Yansen,et al."Mesophyll conductance limitation of photosynthesis in poplar under elevated ozone".SCIENCE OF THE TOTAL ENVIRONMENT 657(2019):136-145.