茶叶科学2023,43(2):205~215JournalofTeaSciencewww.tea-science.com收稿日期:2022-09-18修订日期:2022-12-06基金项目:福建省自然科学基金(2020J01425)、宁德师范学院校级中青年项目(2020Q101)、宁德师范学院人才引进项目(2020Y013)作者简介:郑世仲,男,副教授,主要从事微生物生化和园艺生物技术研究。*通信作者:fjhost@163.com拮抗炭疽病的茶树内生菌筛选、鉴定及培养条件优化郑世仲,周子维,陈晓慧,蔡烈伟,江胜滔,刘盛荣*宁德师范学院生命科学学院,福建宁德352100摘要:为筛选高效拮抗茶树炭疽病的内生细菌,以茶树健康叶片为材料,采用平板对峙拮抗法进行筛选,并对筛选到的菌株进行鉴定、抑菌效果评价及培养条件优化。从分离的162株内生细菌中筛选到1株对茶树胶孢炭疽菌有较好抑制效果的拮抗细菌X13。形态学、生理生化鉴定及16SrDNA系统进化发育分析显示,分离的菌株X13为枯草芽孢杆菌(Bacillussubtilis)。菌株X13对病原菌菌丝生长抑制率为61.6%。生长曲线表明,菌株X13对数生长期为接种后2~14h。响应面优化的培养条件为4.0%(质量百分浓度)玉米粉,1.0%(质量百分浓度)的硝酸钠,接种量3.5%(体积分数)。本研究结果可为茶树炭疽病防治及生防菌剂的开发提供重要参考。关键词:茶树;炭疽病;内生细菌;枯草芽孢杆菌;培养条件中图分类号:S517.1;S435.711文献标识码:A文章编号:1000-369X(2023)02-205-11Screening,IdentificationandCultureConditionOptimizationofAntagonisticEndophyticBacteriaAgainstGloeosporiumtheae-sinensisMiyakeZHENGShizhong,ZHOUZiwei,CHENXiaohui,CAILiewei,JIANGShengtao,LIUShengrong*CollegeofLifeSciencesCollege,NingdeNormalUniversity,Ningde352100,ChinaAbstract:ToscreentheantagonisticendophyticbacteriaagainstGloeosporiumtheae-sinensisMiyake,thehealthyleavesofteaplantswereutilizedasmaterials,andtheplateantagonisticmethodwasused.Theisolatedbacteriawereidentifiedandevaluatedforantimicrobialefficacy.Thecultureconditionswereoptimizedusingresponsesurfacemethodology.OneantagonisticbacteriumX13wasscreenedfrom162strainsofendophyticbacteriaisolated,whichhadagoodinhibitoryeffectonColletotrichumgloeosporioides.ThestrainX13wasidentifiedasBacillussubtilisthroughmorphologicalobservation,physiologicalandbiochemicaltests,and16SrDNAphy...