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题名: PCDD/Fs-induced oxidative damage and antioxidant system responses in tobacco cell suspension cultures
作者: Zhang, Baoqin1, 2;  Zhang, Haijun1;  Jin, Jing1;  Ni, Yuwen1;  Chen, Jiping1
关键词: PCDD/Fs ;  Tobacco Bright Yellow 2 cells ;  Antioxidant enzymes ;  Oxidative stress ;  Phytohormones
刊名: CHEMOSPHERE
发表日期: 2012-08-01
DOI: 10.1016/j.chemosphere.2012.03.085
卷: 88, 期:7, 页:798-805
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) are ubiquitous contaminants and can be considerably accumulated by natural plants. In order to elucidate the biochemical and physiological responses of plant to PCDD/Fs, tobacco Bright Yellow-2 (BY-2) cells were selected as model plant and treated with time- and concentration-dependent PCDD/Fs. The toxic effect and oxidative stress caused by PCDD/Fs were evident, which could be indicted by the reduction in fresh mass, the increase in malondialdehyde (MDA) content, and the damage of tobacco cell ultrastructure. PCDD/Fs tolerance was correlated with changes in antioxidant system and hormones of tobacco cells. Superoxide dismutase (SOD) and peroxidase (POD) exhibited peak enzyme activities at the PCDD/Fs concentration of 1000 ng WHO98-TEQ g(-1) fresh weight. Glutathione reductase (GR) enzyme activity increased monotonically at high level PCDD/Fs, but the activity of catalase (CAT) was only slightly affected at all treatment. Meanwhile, the exposure to PCDD/Fs resulted in the changes of hormones content. With the increase of exposure concentration of PCDD/Fs, the levels of indole-3-acetic acid (IAA) and abscisic acid (ABA) increased, whereas the concentration of jasmonates (JAs) decreased. The above results suggest that tobacco cells had the ability to cope with the oxidative stress induced by low concentration of PCDD/Fs through increasing the activities of antioxidant enzymes and alternating plant hormones levels. However, oxidative stress and toxicity would burst out when plant cells were exposed to the high levels of PCDD/Fs. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: LIPID-PEROXIDATION ;  ORGANIC-COMPOUNDS ;  STRESS ;  PLANTS ;  ENZYMES ;  DIOXIN ;  PHYTOHORMONES ;  EXPOSURE ;  ROOTS ;  ACID
语种: 英语
WOS记录号: WOS:000305600500006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143030
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Zhang, Baoqin,Zhang, Haijun,Jin, Jing,et al. PCDD/Fs-induced oxidative damage and antioxidant system responses in tobacco cell suspension cultures[J]. CHEMOSPHERE,2012,88(7):798-805.
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