壬基酚对羊角月牙藻的毒性效应研究

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Abstract In order to investigate the toxic effects of nonyphenol (NP) on fresh microalgae, Selenastrum capricornutum was exposed to NP with concentrations of 0.1, 0.3, 0.6, 0.9, and 1.2mg/L. The growth, chlorophyll content, superoxide dismutase (SOD), catalase (CAT), and malondialdehyde (MDA) were measured. Besides, chlorophyll fluorescence was obtained through a handy PEA, investigating the influence of NP on the PSⅡ reaction center. The results showed that the 96h EC50 of NP on S. capricornutum was 0.979mg/L. It was found that 0.3mg/L of NP could significantly inhibit the growth of S. capricornutum with decrease in contents of chlorophyll and maximal photochemistry (Fv/Fm), while increase in contents of MDA, activities of SOD and CAT, light absorbed by PSⅡ(ABS/RC), TR₀/RC and the dissipation of energy from reaction centers (DI₀/RC). More importantly, the cellular membrane system and PSⅡ reaction center of S.capricornutum were damaged obviously when the NP concentrations were higher than 0.9mg/L:the activities of SOD and CAT, and TR₀/RC were reduced, while DI0/RC was increased significantly. As a consequent, NP is toxic to S. capricornutum and it may be a potential risk to the aquatic ecosystem.

Key words： nonylphenol Selenastrum capricornutum photochemistry toxic effects

Received: 13 October 2017

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Corresponding Authors: 段舜山,教授,tssduan@jnu.edu.cn E-mail: tssduan@jnu.edu.cn

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	LIU Wei-jie
	WU Xiao-qing
	YAN Jia-ying
	HE Ning
	CHEN Qi
	DUAN Shun-shan

Cite this article:

LIU Wei-jie,WU Xiao-qing,YAN Jia-ying等. Toxic effects of nonylphenol on Selenastrum capricornutum[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(6): 2329-2336.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I6/2329

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