期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 286, 期 -, 页码 440-448出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2015.01.008
关键词
Imidazolium chloride ionic liquids; Growth inhibition; Hill reaction activity; Antioxidant enzyme activity; Chlorophyll fluorescence
资金
- National Natural Science Foundation of China [21377115]
- Zhejiang Provincial Natural Science Foundation of China [Y5100376]
- University Student's Science and Technology Innovation Project of the Zhejiang Provincial
- Graduated Student's Science and Technology Project of Zhejiang Gongshang University [1260XJ1513145]
The effects of three imidazolium chloride ionic liquids (ILs) including 1-octyl-3-methylimidazolium chloride ionic liquid ([OMIM]Cl), 1-decyl-3-methylimidazolium chloride ionic liquid ([DMIM]Cl) and 1-dodecyl-3-methylimidazolium chloride ionic liquid ([C12MIM]Cl) were studied in hydroponically grown rice seedlings. The growth inhibition rate increased and the Hill reaction activity of isolated rice chloroplasts decreased with increasing ILs concentrations. The IC50,5d for stem length was 0.70 mg/L of [OMIM]Cl, 0.15 mg/L of [DMIM]Cl, and 0.055 mg/L of [C12MIM]Cl, respectively. The SOD, POD and CAT activities of chloroplast exhibited initial increases followed by decreases in activity with increasing ILs concentrations. Chlorophyll fluorescence parameters such as the maximum effective quantum yield of PSII(F-v/F-m), the potential activity of PSII(F-v/F-0), the yield of photochemical quantum [Y(II)], the photochemical quenching coefficient (qP), the non-photochemical quenching coefficient (NPQ) and the relative electron transport ratio (rETR) were affected, showing that ILs will damage the PSII. The results demonstrated that imidazolium chloride ILs are phytotoxic to rice growth and their photosystem, the toxicity increased as the alkyl chain length increased with the following order: [OMIM]Cl < [DMIM]Cl < [C12MIM]Cl. The results will help to better understand the possible role of the defense mechanism in rice caused by ILs exposure. (C) 2015 Elsevier B.V. All rights reserved.
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