Differential responses of peach (Prunus persica) seedlings to elevated ozone are related with leaf mass per area, antioxidant enzymes activity rather than stomatal conductance

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	Differential responses of peach (Prunus persica) seedlings to elevated ozone are related with leaf mass per area, antioxidant enzymes activity rather than stomatal conductance
	Wang, Younian; Dai, Lulu; Li, Pin; Shang, Bo; Liu, Shuo; Yang, Aizhen; Feng, Zhaozhong
刊名	ENVIRONMENTAL POLLUTION
	2017-08-01
卷号	227 页码:380-388
关键词	Ozone Prunus Persica Leaf Mass Per Area Antioxidant Defense Stomatal Conductance
英文摘要	To evaluate the ozone (O-3) sensitivity among peach tree (Prunus persica) cultivars widely planted in Beijing region and explore the possible eco-physiological response mechanisms, thirteen cultivars of peach seedlings were exposed to either charcoal-filtered air or elevated O-3 (E-O-3, non-filtered ambient air plus 60 ppb) for one growing season in open-top chambers. Leaf structure, stomatal structure, gas exchange and chlorophyll a fluorescence, photosynthetic pigments, antioxidant defense system and lipid peroxidation were measured in three replicated chambers. Results showed that E-O-3 significantly reduced abaxial epidemis thickness, but no effects on the thicknesses of adaxial epidemis, palisade parenchyma and spongy parenchyma. Stomatal area, density and conductance were not significantly affected by E-O-3. E-O-3 significantly accelerated leaf senescence, as indicated by increased lipid peroxidation and more declines in light-saturated photosynthetic rate and pigments contents. The reduced ascorbate content (ASC) was decreased but antioxidant enzyme activity (CAT, APX and SOD) and total antioxidant capacity (TAC) were significantly increased by E-O-3 among cultivars. The cultivars with visible symptoms also had more reductions in net photosynthetic rate than those without visible symptoms. Ozone sensitivity among cultivars was strongly linked to leaf mass per area (LMA), antioxidant enzymes activity e.g. SOD, APX rather than stomatal parameters (stomatal area, density and conductance) and ASC. Results could provide a theoretical basis for selecting and breeding the ozone resistant cultivars of peach trees grown in high O-3-polluted regions. (C) 2017 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/38986]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Wang, Younian,Dai, Lulu,Li, Pin,et al. Differential responses of peach (Prunus persica) seedlings to elevated ozone are related with leaf mass per area, antioxidant enzymes activity rather than stomatal conductance[J]. ENVIRONMENTAL POLLUTION,2017,227:380-388.
APA	Wang, Younian.,Dai, Lulu.,Li, Pin.,Shang, Bo.,Liu, Shuo.,...&Feng, Zhaozhong.(2017).Differential responses of peach (Prunus persica) seedlings to elevated ozone are related with leaf mass per area, antioxidant enzymes activity rather than stomatal conductance.ENVIRONMENTAL POLLUTION,227,380-388.
MLA	Wang, Younian,et al."Differential responses of peach (Prunus persica) seedlings to elevated ozone are related with leaf mass per area, antioxidant enzymes activity rather than stomatal conductance".ENVIRONMENTAL POLLUTION 227(2017):380-388.