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	Does the depletion of pentachlorophenol in root-soil interface follow a simple linear dependence on the distance to root surfaces?
	He, Yan1,2; Xu, Jianming1; Lv, Xiaofei1; Ma, Zhaohui1; Wu, Jianjun1; Shi, Jiachun1
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2009-09-01
卷号	41期号:9页码:1807-1813
关键词	Pentachlorophenol (PCP) Depletion Microbiological characteristics Phospholipid fatty acid (PLFA) Microbial community Rhizosphere
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2008.11.016
通讯作者	Xu, Jianming(jmxu@zju.edu.cn)
英文摘要	To understand root-soil-microbe interactions in rhizo-depletion of xenobiotics, we conducted a glasshouse study using specially designed laminar rhizoboxes which allow intact layers of near- (1-5 mm) and far- (>5 mm) rhizosphere soil to be harvested separately from root surfaces without the removal of the root material itself. Plant (Lolium perenne L) seedlings were grown for 90 days in a soil treated with PCP at 20 and 50 mg kg(-1). Changes in PCP depletion, soil microbial biomass and community structure (as indicated by phospholipid fatty acids (PLFAs) profiles) with increasing distance from the root surfaces were then assessed after harvesting. Surprisingly, depletion of PCP in the planted rhizoboxes exhibited a nonlinear dependence on the distance to root surfaces, with the most rapid loss in the 2 or 3 mm near-rhizosphere layers, contrasting to the well-known linear gradient of root exudates and mineral nutrients etc. (generally, the extent gradually decreased with increasing distance from the root surface). Soil microbial biomass carbon, however, decreased linearly as expected with increasing distance from the roots. The microbial community structures as indicated by PLFA profiles showed distance-dependent selective enrichment of competent species that may be responsible for efficient PCP depletion. The results suggest that root exudates induced modifications of microbial communities in the PCP contaminated rhizosphere and spatially modified the dominant species within these communities, resulting in the nonlinear PCP depletion pattern. (C) 2008 Elsevier Ltd. All rights reserved.
收录类别	SCI ; ISTP
WOS关键词	MICROBIAL COMMUNITIES ; LOLIUM-PERENNE ; BIOMASS ; DEGRADATION ; RHIZOSPHERE ; PHENANTHRENE ; MYCORRHIZAL ; BACTERIAL
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000269995100008
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558781
专题	南京土壤研究所
通讯作者	Xu, Jianming
作者单位	1.Zhejiang Univ, Coll Environm & Nat Resource Sci, Zhejiang Prov Key Lab Subtrop Soil & Plant Nutr, Hangzhou 310029, Zhejiang, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	He, Yan,Xu, Jianming,Lv, Xiaofei,et al. Does the depletion of pentachlorophenol in root-soil interface follow a simple linear dependence on the distance to root surfaces?[J]. SOIL BIOLOGY & BIOCHEMISTRY,2009,41(9):1807-1813.
APA	He, Yan,Xu, Jianming,Lv, Xiaofei,Ma, Zhaohui,Wu, Jianjun,&Shi, Jiachun.(2009).Does the depletion of pentachlorophenol in root-soil interface follow a simple linear dependence on the distance to root surfaces?.SOIL BIOLOGY & BIOCHEMISTRY,41(9),1807-1813.
MLA	He, Yan,et al."Does the depletion of pentachlorophenol in root-soil interface follow a simple linear dependence on the distance to root surfaces?".SOIL BIOLOGY & BIOCHEMISTRY 41.9(2009):1807-1813.

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