一株酸性果膠酶產(chǎn)生菌的篩選及酶學特性分析

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Screening and Enzymatic Characterization Analysis of an Acid Pectinase-Producing Bacteria

FUJinling，MA Mengyao，LANWeishen， ZENGLiqing，SUNJiaman，LI Shuai* （School of Chemistry and Environmental Science， Xiangnan University， Chenzhou 423oo0， China）

Abstract： In this paper， a strain of pectinase-producing bacteria was screened from the soil by Congo red method，and the enzymaticcharacteristics ofthe pectinase produced by pectin were studied.The results showed that afilamentous fungus with pectinase-producing ability was screened from the soil，and it was identified as Aspergilus niger after molecular biological identification. Under the conditions of 50°C and pH=4.0 ， the pectinase enzyme activity produced by this bacterium was the best. When the pH value is 3.0 to 5.0， its stability is good.

Keywords： pectinase; Aspergillus niger; enzymatic properties

果膠酶來源豐富，植物、動物和微生物均具有果膠酶合成能力。（剩余3934字）