Zinc, Cadmium and Lead Accumulation and Characteristics of Rhizosphere Microbial Population Associated with Hyperaccumulator Sedum Alfredii Hance Under Natural Conditions

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	Zinc, Cadmium and Lead Accumulation and Characteristics of Rhizosphere Microbial Population Associated with Hyperaccumulator Sedum Alfredii Hance Under Natural Conditions
	Long, XX ; Zhang, YG ; Jun, D ; Zhou, QX
刊名	BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
	2009
卷号	82 期号:4 页码:460-467
关键词	Sedum alfredii Hance Rhizosphere Soil microbial population Hyperaccumulation
ISSN号	0007-4861
通讯作者	Long, XX, S China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China
中文摘要	A field survey was conducted to study the characteristics of zinc, cadmium, and lead accumulation and rhizosphere microbial population associated with hyperaccumulator Sedum alfredii Hance growing natively on an old lead/zinc mining site. We found significant hyperaccumulation of zinc and cadmium in field samples of S. alfredii, with maximal shoot concentrations of 9.10-19.61 g kg(-1) zinc and 0.12-1.23 g kg(-1) cadmium, shoot/root ratios ranging from 1.75 to 3.19 (average 2.54) for zinc, 3.36 to 4.43 (average 3.85) for cadmium, shoot bioaccumulation factors of zinc and cadmium being 1.46-4.84 and 7.35-17.41, respectively. While most of lead was retained in roots, thus indicating exclusion as a tolerance strategy for lead. Compared to the non-rhizosphere soil, organic matter and total nitrogen and phosphorus content, CEC and water extractable zinc, cadmium, and lead concentration were significantly higher, but pH was smaller in rhizosphere soil. The rhizosphere soil of S. alfredii harbored a wide variety of microorganism. In general, significantly higher numbers of culturable bacteria, actinomycetes, and fungi were found in the rhizosphere compared to bulk soil, confirming the stimulatory effect of the S. alfredii rhizosphere on microbial growth and proliferation. Analyses of BIOLOG data also showed that the growth of S. alfredii resulted in observable changes in BIOLOG metabolic profiles, utilization ability of different carbon substrates of microbial communities in the rhizosphere soil were also higher than the non-rhizosphere, confirming a functional effect of the rhizosphere of S. alfredii on bacterial population.
学科主题	Environmental Sciences; Toxicology
收录类别	SCI
资助信息	National Natural Science Foundation of China [20407008]; Key Technologies R & D Program of Guangdong Province [2007A020100002-6]
语种	英语
WOS记录号	WOS:000264514800015
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54197]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
推荐引用方式 GB/T 7714	Long, XX,Zhang, YG,Jun, D,et al. Zinc, Cadmium and Lead Accumulation and Characteristics of Rhizosphere Microbial Population Associated with Hyperaccumulator Sedum Alfredii Hance Under Natural Conditions[J]. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY,2009,82(4):460-467.
APA	Long, XX,Zhang, YG,Jun, D,&Zhou, QX.(2009).Zinc, Cadmium and Lead Accumulation and Characteristics of Rhizosphere Microbial Population Associated with Hyperaccumulator Sedum Alfredii Hance Under Natural Conditions.BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY,82(4),460-467.
MLA	Long, XX,et al."Zinc, Cadmium and Lead Accumulation and Characteristics of Rhizosphere Microbial Population Associated with Hyperaccumulator Sedum Alfredii Hance Under Natural Conditions".BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 82.4(2009):460-467.