研究论文
程树培,陈亮,严俊,郝春博,李维新,顾继东,程攻,陈兰明.遗传工程菌Fhhh降解精对苯二甲酸与mnp基因表达[J].环境科学学报,2002,22(1):1-5
遗传工程菌Fhhh降解精对苯二甲酸与mnp基因表达
- Degradation of purified terephthalic acid and expression of mnp gene for GEM Fhhh
- 基金项目:江苏省科委自然科学基金(BK—99033);香港中国环保工业有限公司资助
- 程树培
- 南京大学污染控制与资源化研究国家重点实验室环境学院,南京 210093
- 陈亮
- 南京大学污染控制与资源化研究国家重点实验室环境学院,南京 210093
- 严俊
- 南京大学污染控制与资源化研究国家重点实验室环境学院,南京 210093
- 郝春博
- 南京大学污染控制与资源化研究国家重点实验室环境学院,南京 210093
- 李维新
- 南京大学污染控制与资源化研究国家重点实验室环境学院,南京 210093
- 摘要:跨界融合构建的遗传工程菌Fhhh及其亲株黄孢显毛平革菌(PC),降解精对苯二甲酸的比降解率受到Mn2+、酒石酸铵、H2O2、pH共4因素的影响.除pH值外,其余3个因素影响2菌株比降解率大小的排序完全一致.pH值对PC菌的影响排序处于第3位,对Fhhh则处于第1位.Fhhh比降解率比PC高出1111%;mnp基因表达的锰过氧化物酶(MnP)比活力水平比PC高出15.22%.降解精对苯二甲酸4因素优化水平,也是mnp基因表达的优化条件.比降解率与MnP的比活力水平之间有显著或极显著正相关性(r>r0.05(4),r>r0.01(4).研究结果为高效处理精对苯二甲酸废水提供了重要的分子生物学依据.
- Abstract:The levels of the specific degradation rate (SDR) for the genetically engineered microorganism (GEM) Fhhh from interkingdom protoplast fusion and the parental strain %Phanerochaete chrysosporium% (PC) in degradation of purified terephthalic acid (PTA) were affected by (NH4)2C4H4O6,H2O2,Mn2+,and pH value.Except pH value,the other 3 factors affecting the SDR levels had a same order for both strains.The pH value in the order was at the first site for Fhhh,and that for PC at the third site.At the optimal levels,the SDR value of Fhhh was 11.11% higher than that of PC;the value of manganese peroxidase specific activity (MnPSA) of Fhhh was 15.22% higher than that of PC.There was a positive relationship between SDR and MnP-SA significantly.The optimal levels of 4 factors for SDR also were the optimal levels for mnp gene expression.The technique of the mnp gene expression control would be useful to treat PTA wastewater.
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