六价铬
铬酸钾
铬
叶绿素荧光
化学
铬酸盐转化膜
叶绿素
环境化学
重铬酸钾
光合作用
苔藓
光化学
核化学
无机化学
植物
生物化学
生物
有机化学
作者
Yang-Er Chen,Hao-Tian Mao,Jie Ma,Nan Wu,Chaoming Zhang,Yan-Qiu Su,Zhongwei Zhang,Ming Yuan,Huaiyu Zhang,Xianyin Zeng,Shu Yuan
出处
期刊:Chemosphere
[Elsevier]
日期:2018-03-01
卷期号:194: 220-228
被引量:23
标识
DOI:10.1016/j.chemosphere.2017.11.177
摘要
We systematically compared the impacts of four Cr salts (chromic chloride, chromic nitrate, potassium chromate and potassium bichromate) on physiological parameters and chlorophyll fluorescence in indigenous moss Taxiphyllum taxirameum. Among the four Cr salts, K2Cr2O7 treatment resulted in the most significant decrease in photosynthetic efficiency and antioxidant enzymes, increase in reactive oxygen species (ROS), and obvious cell death. Different form the higher plants, although hexavalent Cr(VI) salt treatments resulted in higher accumulation levels of Cr and were more toxic than Cr(III) salts, Cr(III) also induced significant changes in moss physiological parameters and chlorophyll fluorescence. Our results showed that Cr(III) and Cr(VI) could be monitored distinguishably according to the non-photochemical quenching (NPQ) fluorescence of sporadic purple and sporadic lavender images respectively. Then, the valence states and concentrations of Cr contaminations could be evaluated according to the image of maximum efficiency of PSII photochemistry (Fv/Fm) and the quantum yield of PSII electron transport (ΦPSII). Therefore, this study provides new ideas of moss's sensibility to Cr(III) and a new method to monitor Chromium contaminations rapidly and non-invasively in water.
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