Title: | Ethylenediurea (EDU) pretreatment alleviated the adverse effects of elevated O(3) on Populus alba 'Berolinensis' in an urban area |
Author(s): | Xu S; He X; Burkey K; Chen W; Li P; Li Y; Li B; Wang Y; |
Address: | "Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. Electronic address: hexy@iae.ac.cn. Plant Science Research Unit, USDA-ARS, Raleigh, NC 27616, USA. Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China" |
DOI: | 10.1016/j.jes.2019.04.018 |
ISSN/ISBN: | 1001-0742 (Print) 1001-0742 (Linking) |
Abstract: | "Ethylenediurea (EDU) has been used as a chemical protectant against ozone (O(3)). However, its protective effect and physiological mechanisms are still uncertain. The present study aimed to investigate the changes of foliar visible injury, physiological characteristics and emission rates of volatile organic compounds (VOCs) in one-year-old Populus alba 'Berolinensis' saplings pretreated with EDU and exposed to elevated O(3) (EO, 120?ª+mug/m(3)). The results showed that foliar visible injury symptoms under EO were significantly alleviated in plants with EDU application (p?ª+ª+0.05). Under EO, net photosynthetic rate, the maximum photochemical efficiency of PSII and the photochemical efficiency of PSII of plants pretreated with 300 and 600?ª+mg/L EDU were similar to unexposed controls and significantly higher compared to EO-stressed plants without EDU pretreatment, respectively. Malondialdehyde content was highest in EO without EDU and decreased significantly by 14.9% and 21.3% with 300 and 600?ª+mg/L EDU pretreatment, respectively. EDU pretreatment alone increased superoxide dismutase activity by 10-fold in unexposed plants with further increases of 88.4% and 37.5% in EO plants pretreated with 300 and 600?ª+mg/L EDU pretreatment, respectively (p?ª+ª+0.05). Abscisic acid content declined under EO relative to unexposed controls with the effect partially reversed by EDU pretreatments. Similarly, VOCs emission rate declined under EO relative to unexposed plants with a recovery of emission rate observed with 300 and 600?ª+mg/L EDU pretreatment. These findings provided significant evidence that EDU exerted a beneficial effect and protection on the tested plants against O(3) stress" |
Keywords: | "Ozone/*toxicity Phenylurea Compounds/*pharmacology Photosynthesis/*drug effects Plant Leaves/*drug effects Populus/*drug effects/metabolism Stress, Physiological/drug effects Volatile Organic Compounds/metabolism Foliar visible injury Ground-level O(3) Op;" |
Notes: | "MedlineXu, Sheng He, Xingyuan Burkey, Kent Chen, Wei Li, Pin Li, Yan Li, Bo Wang, Yijing eng Evaluation Study Netherlands 2019/07/10 J Environ Sci (China). 2019 Oct; 84:42-50. doi: 10.1016/j.jes.2019.04.018. Epub 2019 Apr 25" |