期刊论文

Physiological Response of Iris pseudacorus to Atrazine Stress

中文

生态毒理学报

1673-5897

2020

15

05

255-263

10.7524/AJE.1673-5897.20190705001

北京市自然科学基金资助项目（5192004）； 国家自然科学基金资助项目（31370540）；

本校为第一机构

化学除草剂阿特拉津通过阻碍电子传递抑制植物光合作用,其水体污染的生态毒性倍受关注。为揭示挺水植物对阿特拉津胁迫的生理响应规律,采用水培试验模拟不同浓度阿特拉津胁迫,测定黄菖蒲叶绿素荧光参数及叶片防御酶活性在抑菌和无抑菌条件下的变化,分析二者间的相关性。结果表明,不抑菌条件下,胁迫浓度≤4 mg·L~(-1)时,POD和PPO活性增强,随着胁迫强度加大活性下降,而SOD活性显著升高。PPO活性与多个叶绿素荧光参数、MDA含量显著相关。胁迫浓度≤1 mg·L~(-1)时,植物各叶绿素荧光参数均与对照组无显著差异;4 mg·L~(-1)时仍可维持正常水平的叶绿素含量和光合效率。这表明,阿特拉津胁迫下3种酶的...

Atrazine inhibits plant photosynthesis by blocking the electron transfer in the photosystem Ⅱ.Atrazine pollution in surface waters has become the subject of continuous concern due to its potential ecotoxicity.In order to detect the physiological response of the emergent plants to the atrazine stress,Iris pseudacorus was exposed to atrazine(0.5,1,2,4 and 8 mg·L~(-1)) for 3 weeks in a hydroponic system.The chlorophyll fluorescence parameters and defense enzyme activities of the leaves were determined under nature and sterile conditions.The corr...