Effect of cadmium toxicity on nitrogen metabolism in leaves of Solanum nigrum L. as a newly found cadmium hyperaccumulator

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	Effect of cadmium toxicity on nitrogen metabolism in leaves of Solanum nigrum L. as a newly found cadmium hyperaccumulator
	Wang, L; Zhou, QX; Ding, LL; Sun, YB; Zhou, QX, Chinese Acad Sci, Inst Appl Ecol, Key Lab Terrestrial Ecol Proc, Shenyang 110016, Peoples R China
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2008
卷号	154 期号:1-3 页码:818-825
关键词	Solanum Nigrum Heavy Metal Phytoremediation Nutrient Metabolism Tolerance
ISSN号	0304-3894
英文摘要	Hyperaccumulators are ideal plant species used for phytoremediation of soils contaminated by heavy metals. A full understanding of metal tolerance mechanisms of hyperaccumulators will facilitate enhancing their phytoremediation efficiency. However, how Cd affects N metabolism and which role plays the response of N metabolism to Cd toxicity in the tolerance of hyperaccumulators are still unknown. To clarify these questions, this study investigated the effects of various soil Cd levels on the concentrations of N forms and the activity of key enzymes involved in N metabolism in leaves of the Cd hyperaccumulator, Solanum nigrum L. The results showed that its growth and all N metabolism indicators were normal at low Cd exposure (<= 12 mg kg(-1)). At 24 mg Cd kg(-1) soil, nitrate assimilation indicators (nitrate concentration and activity of nitrate reductase) were reduced significantly, whereas most ammonia assimilation indicators (ammonium concentration and activity of glutamine synthetase) remained normal. However, when exposed to a higher Cd level (48 mg kg(-1)), growth and most N metabolism indicators were reduced significantly. Therefore, N metabolism in leaves of S. nigrum could be tolerant of Cd toxicity to a certain extent (soil Cd concentration <= 12 mg kg(-1)), and this might be involved in the Cd-tolerance of this Cd-hyperaccumulator. (C) 2007 Elsevier B.V. All rights reserved.
学科主题	Engineering, Environmental ; Engineering, Civil ; Environmental Sciences
语种	英语
WOS记录号	WOS:000256111200105
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54459]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Zhou, QX, Chinese Acad Sci, Inst Appl Ecol, Key Lab Terrestrial Ecol Proc, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, L,Zhou, QX,Ding, LL,et al. Effect of cadmium toxicity on nitrogen metabolism in leaves of Solanum nigrum L. as a newly found cadmium hyperaccumulator[J]. JOURNAL OF HAZARDOUS MATERIALS,2008,154(1-3):818-825.
APA	Wang, L,Zhou, QX,Ding, LL,Sun, YB,&Zhou, QX, Chinese Acad Sci, Inst Appl Ecol, Key Lab Terrestrial Ecol Proc, Shenyang 110016, Peoples R China.(2008).Effect of cadmium toxicity on nitrogen metabolism in leaves of Solanum nigrum L. as a newly found cadmium hyperaccumulator.JOURNAL OF HAZARDOUS MATERIALS,154(1-3),818-825.
MLA	Wang, L,et al."Effect of cadmium toxicity on nitrogen metabolism in leaves of Solanum nigrum L. as a newly found cadmium hyperaccumulator".JOURNAL OF HAZARDOUS MATERIALS 154.1-3(2008):818-825.