十溴联苯醚是我国电子垃圾拆解地区土壤常见污染物之一，其在土壤根际圈的转化归趋行为研究可为土壤修复提供理论基础，而植物（东南景天）-微生物跨界信号传导在污染物降解及归趋中具有重要作用。本项目以微生物群体感应为主线，研究植物激素、根系分泌物对微生物信号分子的响应，微生物群体感应调控植物内生细菌定殖从而提高污染物降解转化能力的角度阐明植物-微生物跨界信号传导对十溴联苯醚转化归趋的影响；从植物蛋白质组学角度探讨植物-微生物跨界信号传导如何提高东南景天对十溴联苯醚的耐受性，同时通过LuxR家族蛋白基因表达水平的变化揭示十溴联苯醚影响植物-微生物跨界信号传导的分子生物学机制。本项目的实施将为土壤中多溴联苯醚的风险控制提供新的思路，为阐释根际圈污染物降解、污染土壤植物修复的生物驱动力提供新的见解。

Decabromodiphenyl ether (BDE-209) is one of the most popular pollutants in electronic waste recycling area. The research on fate and transformation of pollutants in rhizosphere could provide a theoretical basis for its phytoremediation, and plant(Sedum alfredii Hance)-bacteria interkingdom signaling play an important role in the fate and degradation of pollutants. It was basically circumfuse microbial quorum-sensing, and aimed to research the response of microbial signaling molecules to plant hormones and root exudates, how plant-bacterial interkingdom signaling influence rhizospheric behavior from the viewpoint that microbial quorum-sensing could control the colonization of endophytic bacteria. It will discuss the tolerance of Sedum alfredii Hance to BDE-209 attributed to plant-bacterial interkingdom signaling in the viewpoint of plant proteomics. It plan to reveal the molecular mechanisms on plant-bacterial interkingdom signaling effected by BDE-209 by the changes of LuxR gene expression. The implementation of this research project will support a new concept on BDE-209 risk controlling in soil, and support a new idea on the microbial driving forces on pollutant biodegradation and phytoremediation in rhizosphere.