Interactions of Marsh Orchid(Dactylorhiza spp.)and Soil Microorganisms in Relation to Extracellular Enzyme Activities in a Peat Soil

作     者：H. KANG C. FREEMAN H.KANG~1 C.FREEMAN~2 1 Department of Civil and Environmental Engineering,Yonsei University,Seou1 120-749(Korea) 2 School of Biological Sciences,University of Wales,Bangor,LL57 2UW(UK)

作者机构：Department of Civil and Environmental Engineering Yonsei University Seoul 120- 749 （Korea） School of Biological Sciences University of Wales Bangor LL57 2UW （UK） 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2007年第17卷第6期

页      面：681-687页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：Project supported by the Advanced Environmental Biotechnology Research Center(AEBRC),Korea the Korea Science and Engineering Foundation the Ecotopia 21 of Ministry of Environment,Korea 

主　　题：Dactylorhiza extracellular enzyme peat rhizosphere wetland 

摘      要：The nature of the interactions between microbes and roots of plants in a peaty soil were studied in a laboratory- based experiment by measuring activities ofβ-glucosidase,phosphatase,N-acetylglucosaminidase,and *** experiment was based on control(autoclaved),bacteria-inoculated,and plant(transplanted with Dactylorhiza)treatments, and samples were collected over 4 sampling *** enzyme activities were associated with the bacteria-inoculated treatment,suggesting that soil enzyme activities are mainly of microbial *** example,β-glucosidase activity varied between 25-30μmol g^(-1)min^(-1)in the bacteria-inoculated samples whilst the activity of the control ranged between 4-12μmol g^(-1)min^(-1)A similar pattern was found for all other enzymes. At the end of the incubation,the microcosms were destructively sampled and the enzyme activities determined in bulk soil,rhizospheric soil,and on the root *** measurement in different fractions of the peat indicated that higher activities were found in ***,the higher activities ofβ-glucosidase,N-acetylglucosaminidase,and arylsulphatase appeared to be associated with bacterial proliferation on the root surface,whilst a larger proportion of phosphatase appeared to be released from root surface.