气候变化领域集成服务门户(CCPortal): Ozone-induced changes in physiological and biochemical traits in Elaeocarpus sylvestris and Michelia chapensis in South China

CCPortal

DOI	10.1016/j.apr.2020.02.009
	Ozone-induced changes in physiological and biochemical traits in Elaeocarpus sylvestris and Michelia chapensis in South China
	Pan L.; Zou X.-J.; Lie G.-W.; Xue L.; Chen H.-Y.
发表日期	2020
ISSN	13091042
英文摘要	The influences of elevated ozone (O3) concentrations on biomass, leaf gas exchange, fluorescence parameters, and leaf physiological and biochemical traits were examined in Elaeocarpus sylvestris and Michelia chapensis seedlings under four O3 conditions for a growing season in open-top chambers (OTCs). The four O3 concentrations were charcoal-filtered air (CF) (20 ppb), 1 × O3 air (40 ppb), 2 × O3 air (80 ppb), and 4 × O3 air (160 ppb), respectively. The significant decrease in the root/shoot (R/S) ratios of both species indicated that under O3 stress root biomass was more negatively affected than shoot biomass for both tree seedlings. Along with the loss of chlorophyll and carotenoid contents, decrease in the superoxide dismutase (SOD), and enhanced level of lipid peroxidant, the light-saturated net photosynthesis rate (Pnmax) of E. sylvestris, the effective quantum yield of PSII photochemistry (Y(II)) and the electron transport rate (ETR) of both species decreased, suggesting that impaired photosynthesis occurred. The negative effect of O3 on physiological and biochemical parameters was greater for M. chapensis than for E. sylvestris. As the O3 concentration increased, the leaf mass per area (LMA) of E. sylvestris decreased, while that of M. chapensis increased. Therefore, the increased SOD activity as a hormetic-compensatory response, the increases in LMA and longer vegetative period contributed to the good adaptability and high tolerance of M. chapensis. © 2020 Turkish National Committee for Air Pollution Research and Control
英文关键词	Antioxidative system; Biomass allocation; Chlorophyll α fluorescence; Gas exchange; Leaf nutrient; Tropospheric ozone
语种	英语
来源期刊	Atmospheric Pollution Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120634
作者单位	College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China; Guangdong Eco-Engineering Polytechnic, Guangzhou, 510520, China
推荐引用方式 GB/T 7714	Pan L.,Zou X.-J.,Lie G.-W.,et al. Ozone-induced changes in physiological and biochemical traits in Elaeocarpus sylvestris and Michelia chapensis in South China[J],2020.
APA	Pan L.,Zou X.-J.,Lie G.-W.,Xue L.,&Chen H.-Y..(2020).Ozone-induced changes in physiological and biochemical traits in Elaeocarpus sylvestris and Michelia chapensis in South China.Atmospheric Pollution Research.
MLA	Pan L.,et al."Ozone-induced changes in physiological and biochemical traits in Elaeocarpus sylvestris and Michelia chapensis in South China".Atmospheric Pollution Research (2020).