采集大宝山矿区重金属污染的土壤样品,采用稀释涂布平板法对土壤样品中抗铅菌株的筛选,进一步在含不同铅浓度的培养液中进行驯化;通过对该菌株的形态观察、一系列生理生化试验、以及16S r DNA序列的比对研究进行鉴定;利用原子荧光光度...采集大宝山矿区重金属污染的土壤样品,采用稀释涂布平板法对土壤样品中抗铅菌株的筛选,进一步在含不同铅浓度的培养液中进行驯化;通过对该菌株的形态观察、一系列生理生化试验、以及16S r DNA序列的比对研究进行鉴定;利用原子荧光光度计测定其对发酵液中铅的吸附能力。结果表明,分离获得的抗铅菌株在铅浓度为500 mg·L-1的培养液中长势良好,鉴定为类短短芽孢杆菌(Brevibacillus parabrevis),该菌株在含铅浓度为300mg·L-1的液体培养情况下,培养20 h左右,对发酵液中铅的去除效率高,高达30.27%。展开更多
The 46 strains that produced inulase were screened from rhizosphere soil where Jerusalem artichoke was planted in Qinghai.One strain with high inulinase productivity was obtained through further screening and the enzy...The 46 strains that produced inulase were screened from rhizosphere soil where Jerusalem artichoke was planted in Qinghai.One strain with high inulinase productivity was obtained through further screening and the enzyme activity was6.67 U/ml.This inulinase was exonuclease.Through determination and analysis of the r DNA-ITS sequence,and analysis of morphology,the fungus was identified as Actinomucor elegans.展开更多
基金Supported by the Scientific Research Foundation for Middle-aged and Young Scientistof Qinghai University,China(2010-QN-06)~~
文摘The 46 strains that produced inulase were screened from rhizosphere soil where Jerusalem artichoke was planted in Qinghai.One strain with high inulinase productivity was obtained through further screening and the enzyme activity was6.67 U/ml.This inulinase was exonuclease.Through determination and analysis of the r DNA-ITS sequence,and analysis of morphology,the fungus was identified as Actinomucor elegans.
