一直以来，多环芳烃（PAHs）污染治理已经成为环境科学关注的热点问题。微生物修复因具有强降解能力和对环境友好等特点，被认为是环境中多环芳烃去除的主要途径。近些年来，人们在筛选高效降解菌和探究多环芳烃代谢路径等方面都取得了进展，然而微生物在菌群水平上是如何应对多环芳烃所带来的胁迫压力目前尚不清楚。本论文以一株能广谱和高效地降解2至5环PAHs的革兰氏阴性细菌—新鞘氨醇杆菌US6-1（NovosphingobiumpentaromativoransUS6-1）为研究对象，利用显微镜观察、基因组分析和基因差异表达分析等生物学手段研究了US6-1的群体感应（QuorumSensing，QS）系统，以及...For a long time, polycyclic aromatic hydrocarbons (PAHs) pollution abatement has become the hot topic in environmental science. Bioremediation is considered to be the main way to remove PAHs in the environment because of its high degradation ability and friendly to environment. In recent years, people have made progress in screening efficient degradation bacteria and exploring the metabolism of PA...学位：理学硕士院系专业：生命科学学院_微生物学学号：2162014115245
