_高效木质素降解菌的筛选及降解性能研究
- 张立中
-
0 次阅读
-
0 次下载
-
2020-04-28 21:54:46
文档简介:
收稿日期:2014-10-10修回日期:2014-10-20作者简介:司梦莹(1989-),女,硕士,主要从事木质纤维生物转化相关研究。*广西科技开发计划项目(桂科攻14124004-3-4),广西科学院基本科研业务费资助项目(11YJ24SW13)和湖南省教育厅高校科技经费一般项目(14C1085)资助。**通讯作者:陈跃辉(1982-),男,博士,讲师,主要从事有机物生物降解研究,E-mail:yuehuichen@yahoo.com。广西科学GuangxiSciences2015,22(1):48~52,59网络优先数字出版时间:2015-01-26网络优先数字出版地址:http://www.cnki.net/kcms/detail/45.1206.G3.20150126.1547.005.html高效木质素降解菌的筛选及降解性能研究*ScreeningofHighActiveLignin-degradingStrainsandtheMeasurementofTheirLigninDegradation司梦莹1,师德强2,戴友芝1,陈跃辉1**SIMeng-ying1,SHIDe-qiang2,DAIYou-zhi1,CHENYue-hui1(1.湘潭大学化工学院环境科学与工程系,重金属污染控制湖南省高校重点实验室,湖南湘潭411105;2.广西科学院,广西南宁530007)(1.KeyLaboratoryofHeavyMetalPollutionControl,CollegeofHunanProvince,Depart-mentofEnvironmentalScienceandEngineering,CollegeofChemicalEngineering,XiangtanUniversity,Xiangtan,Hunan,411105,China;2.GuangxiAcademyofSciences,Nanning,Guangxi,530007,China)摘要:【目的】筛选纯化及鉴定木质素降解菌,对其降解性能进行初步研究。【方法】从某制浆造纸厂的造纸废水污泥中,筛选获得2株具有木质素降解能力的细菌LD-1和LD-2。通过形态观察和16SrRNA序列分析对菌株进行鉴定;采用苯胺蓝平板脱色法及以TC为指标分别定性定量测定2株细菌的木质素降解能力。【结果】LD-1和LD-2分别被鉴定为Sphingobacterium属和Bacillus属的菌株,命名为Sphingobacteriumsp.LD-1和Bacillussp.LD-2。通过苯胺蓝平板脱色实验,发现LD-1和LD-2均具有良好的木质素降解能力。经测定,两株菌种发酵7d对木质素的降解率分别达到52.23%和50.36%。【结论】成功筛选到2株能高效降解木质素的菌株LD-1和LD-2。关键词:木质素造纸废水细菌生物降解中图分类号:X172,Q93-331文献标识码:A文章编号:1005-9164(2015)01-0048-05Abstract:【Objective】Thisstudyfocusedonscreening,isolatingandidentifyinglignin-degradingstrains,andstudyingontheirlignindegradation.【Methods】Twolignin-degradingbacterialstrains(LD-1,LD-2)wereisolatedfromtheeffluentsludgeofapulppapermill,andidentifiedbymorphologicalobservationand16SrRNAsequenceanalysis.Theiractivityoflignindegrada-tionweremeasuredqualitativelyandquantitativelybyusingplateculturemediumwithAzure-BandTCindex,respectively.【Results】LD-1andLD-2werecharacterisedasGramnegativesmallrodandGrampositiverod.Further,16SrRNAsequencingshowed99%basesequencehomolo-gytoSphingobacteriumandBacillus,andthetwostrainswerefinallydesignatedasSphingobacteriumsp.LD-1andBacillussp.LD-2,respectively.LD-1andLD-2showedpoten-tialoflignindegra
评论
发表评论