Response of Lemna minor L. to short-term cobalt exposure: The effect on photosynthetic electron transport chain and induction of oxidative damage

被引：45

作者：

Begovic, Lidija ^{[1
]}

Mlinaric, Selma ^{[1
]}

Dunic, Jasenka Antunovic ^{[1
]}

Katanic, Zorana ^{[1
]}

Loncaric, Zdenko ^{[2
]}

Lepedus, Hrvoje ^{[3
]}

Cesar, Vera ^{[1
]}

机构：

[1] Josip Juraj Strossmayer Univ Osijek, Dept Biol, Ul Cara Hadrijana 8-A, HR-31000 Osijek, Croatia

[2] Josip Juraj Strossmayer Univ Osijek, Fac Agr, Ul Kralja Petra Svacica 1d, HR-31000 Osijek, Croatia

[3] Josip Juraj Strossmayer Univ Osijek, Fac Humanities & Social Sci, Lorenzo Jagera 9, HR-31000 Osijek, Croatia

来源：

AQUATIC TOXICOLOGY | 2016年 / 175卷

关键词：

Cobalt; Lemna minor; Photosystem II; Oxygen evolving complex; Lipid peroxidation; HEAVY-METALS; LIPID-PEROXIDATION; PHOTOSYSTEM-II; BARLEY LEAVES; GROWTH-RATE; FLUORESCENCE; DUCKWEED; CADMIUM; STRESS; TOXICITY;

D O I：

10.1016/j.aquatox.2016.03.009

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

The effect of two concentrations of cobalt (Co2+) on photosynthetic activity and antioxidative response in Lemna minor L were assessed 24, 48 and 72 h after the start of the exposure. Higher concentration of cobalt (1 mM) induced growth inhibition while lower concentration (0.01 mM) increased photosynthetic pigments content. Analysis of chlorophyll a fluorescence transients revealed high sensitivity of photosystem II primary photochemistry to excess of Co2+ especially at the higher concentration where decreased electron transport beyond primary quinone acceptor Q(A)(-) and impaired function of oxygen evolving complex (OEC) was observed. Due to impairment of OEC, oxygen production was decreased at higher Co2+ concentration. Activity of superoxide dismutase was mainly inhibited while lipid peroxidation increased, at both concentrations, indicating that cobalt-induced oxidative damage after short exposure and moreover, susceptibility of the membranes in the cell to cobalt toxicity. Results obtained in this study suggest possible application of used parameters as tools in assessment of early damage caused by metals. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：117 / 126

页数：10

共 63 条

[1]

[Anonymous], REV ENV CONTAMINATIO

[2] Multiple effects of chromate on the photosynthetic apparatus of Spirodela polyrhiza as probed by OJIP chlorophyll a fluorescence measurements [J].