Microbial Biomass and PLFA Profile Changes in Rhizosphere of Pakchoi(Brassica chinensis L.) as Affected by External Cadmium Loading

作     者：SHENTU Jia-Li HE Zhen-Li ZENG Yan-Yan HE Shan-Ying DU Shao-Ting SHEN Dong-Sheng 

作者机构：College of Environmental Science and EngineeringZhejiang Gongshang University Zhejiang Provincial Key Laboratory of Solid Waste Treatment and RecyclingZhejiang Gongshang University Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem HealthCollege of Environmental and Resources ScienceZhejiang University Institute of Food and Agricultural ScienceIndian River Research and Education CenterUniversity of FloridaFort PierceFL 34945(USA) 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2014年第24卷第4期

页      面：553-562页

核心收录：

学科分类：07[理学] 09[农学] 0902[农学-园艺学] 090202[农学-蔬菜学] 0713[理学-生态学] 

基　　金：Supported by the Department of Education of Zhejiang Province,China(No.Y200804542) the Innovative Research Team in Higher Educational Institutions of Zhejiang Province,China(No.T200912) the Environmental Protection Research Plana of Hangzhou,China(No.2011008) the Zhejiang Gongshang University,China(No.X13-01) 

主　　题：acidic soils metal bioavailability microbial community microorganism root activity 

摘      要：The effects of root activity on microbial response to cadmium(Cd) loading in the rhizosphere are not well understood.A pot experiment in greenhouse was conducted to investigate the effects of low Cd loading and root activity on microbial biomass and community structure in the rhizosphere of pakchoi(Brassica chinensis L.) on silty clay loam and silt loamy *** was added into soil as Cd(NO_3)_2 to reach concentrations ranging from 0.00 to 7.00 mg kg^(-1).The microbial biomass carbon(MBC) and community structure were affected by Cd concentration,root activity,and soil *** Cd loading rates(1.00 mg kg^(-1)) stimulated the growth of pakchoi and microorganisms,but higher Cd concentrations inhibited the growth of *** content of phospholipid fatty acids(PLFAs) was sensitive to increased Cd *** was linearly correlated with the total *** content of general PLFAs in the fungi was positively correlated with the available Cd in the soil,whereas those in the bacteria and actinomycetes were negatively correlated with the available Cd in the *** results indicated that fungi were more resistant to Cd stress than bacteria or actinomycetes,and the latter was the most sensitive to Cd *** biomass was more abundant in the rhizosphere than in the bulk *** activity enhanced the growth of microorganisms and stabilized the microbial community structure in the *** analysis was proven to be sensitive in detecting changes in the soil microbial community in response to Cd stress and root activity.