Elevated ozone reduced leaf nitrogen allocation to photosynthesis in poplar

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	Elevated ozone reduced leaf nitrogen allocation to photosynthesis in poplar
	Shang, Bo ; Xu, Yansen ; Dai, Lulu ; Yuan, Xiangyang ; Feng, Zhaozhong
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-03-20
卷号	657 页码:169-178
关键词	Cell walls Leaf nitrogen concentration leaf nitrogen allocation Ozone Photosynthesis PNUE
ISSN号	0048-9697
英文摘要	We investigated the effects of elevated ozone (O-3) concentration on leaf nitrogen (N), a key determinant of plant photosynthesis, with two clones of poplar grown in open-top chambers. We focus on the difference between mass-based leaf N concentration (N-mass) and area-based one (N-area) in their responses to elevated O-3, and the allocation of N to different leaf components: photosynthetic apparatus, cell walls, and others under elevated O-3 level. Our results showed that elevated O-3 significantly increased N-mass, but reduced N-area and leaf mass per area (LMA). The two clones showed no difference in N-mass response to O-3, but the more sensitive clone showed greater reduction of N-area and LMA due to O-3. We also found positive relationships between N-area and photosynthetic parameters, e.g. light-saturated photosynthetic rate (A(sat)). furthermore, elevated O-3 significantly reduced photosynthetic N-use efficiency (PNUE) and leaf N allocation to photosynthetic components, while increasing N allocation to cell walls and other components. We concluded that plants invested more N in cell walls and other components to resist O-3 damages at the expense of photosynthetic N. The change of N allocation in plant leaves in response to elevated O-3 could have an impact on ecological processes, e.g. leaf litter decomposition. (C) 2018 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42726]
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, Shuangqing Rd 18, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 3.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Atmospher Environm & Equip, Sch Environm Sci & Technol, Nanjing 210044, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Shang, Bo,Xu, Yansen,Dai, Lulu,et al. Elevated ozone reduced leaf nitrogen allocation to photosynthesis in poplar[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,657:169-178.
APA	Shang, Bo,Xu, Yansen,Dai, Lulu,Yuan, Xiangyang,&Feng, Zhaozhong.(2019).Elevated ozone reduced leaf nitrogen allocation to photosynthesis in poplar.SCIENCE OF THE TOTAL ENVIRONMENT,657,169-178.
MLA	Shang, Bo,et al."Elevated ozone reduced leaf nitrogen allocation to photosynthesis in poplar".SCIENCE OF THE TOTAL ENVIRONMENT 657(2019):169-178.