论文摘要
Ethylenediurea（EDU）has been used as a chemical protectant against ozone（03）.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 O3（EO,120μg/m3）.The results showed that foliar visible injury symptoms under EO were significantly alleviated in plants with EDU application（p<0.05）.Under EO,net photosynthetic rate,the maximum photochemical efficiency of PSII and the photochemical efficiency of PSII of plants pretreated with 300 and600 mg/L EDU were similar to unexposed controls and significantly higher compared to EOstressed plants without EDU pretreatment,respectively.Malondialdehyde content was highest in EO without EDU and decreased significantly by 14.9%and 21.3%with 300 and600 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 mg/L EDU pretreatment,respectively（p<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 mg/L EDU pretreatment.These findings provided significant evidence that EDU exerted a beneficial effect and protection on the tested plants against 03 stress.
论文目录
文章来源
类型: 期刊论文
作者: Sheng Xu,Xingyuan He,Kent Burkey,Wei Chen,Pin Li,Yan Li,Bo Li,Yijing Wang
来源: Journal of Environmental Sciences 2019年10期
年度: 2019
分类: 工程科技Ⅰ辑,农业科技
专业: 环境科学与资源利用,植物保护
单位: Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences,Plant Science Research Unit,USDA-ARS,Research Center for Eco-environmental Sciences, Chinese Academy of Sciences
基金: supported by the National Natural Science Foundation of China (Nos. 41675153,31870458,31270518,31170573,31670412)
分类号: X515;X503.235
页码: 42-50
总页数: 9
文件大小: 544K
下载量: 11