BEGIN:VCALENDAR VERSION:2.0 PRODID:-//wp-events-plugin.com//7.2.2.1//EN TZID:Asia/Jerusalem X-WR-TIMEZONE:Asia/Jerusalem BEGIN:VEVENT UID:1259@biology.technion.ac.il DTSTART;TZID=Asia/Jerusalem:20241223T130000 DTEND;TZID=Asia/Jerusalem:20241223T140000 DTSTAMP:20241217T072724Z URL:https://biology.technion.ac.il/en/seminars/faculty-seminar-dr-dor-russ -23-12-molecular-mechanisms-of-plant-microbiome-assembly-from-bacterial-ge nes-to-host-specificity/ SUMMARY:Faculty seminar - Dr. Dor Russ 23.12 -"Molecular Mechanisms of Plan t Microbiome Assembly: From Bacterial Genes to Host Specificity" [No Categ ories] DESCRIPTION:Location: Faculty Of Biology Auditorium/ZOOM:https://technion.z oom.us/j/91374645319 Dr. Dor Russ \n Affiliation: University of North Ca rolina at Chapel Hill\n Host:Dr. Shainer Inbal\n Dear all\,\n\n \;\n\n Our next seminar will be given by Dr. Dor Russ from the Department of Biol ogy\, University of North Carolina at Chapel Hill\n\n \;\n\nPlace and time: Biology auditorium\, Monday 23/12 at 13:00.\n\n \;\n\nTitle: Mol ecular Mechanisms of Plant Microbiome Assembly: From Bacterial Genes to Ho st Specificity\n\n \;\n\nAbstract:\n\nIn nature\, plants recruit a div erse microbial community\, the plant microbiome\, that is distinct from th e surrounding soil community. That microbial community is essential for  plant growth and health. To understand the forces that shape the plant mic robiome we need to characterize the microbial traits that contribute to pl ant colonization. We used barcoded mutant libraries to identify bacterial genes that contribute to the colonization of a monocot and a eudicot host. Our analysis revealed dozens of colonization genes\, with most showing un expected host and organ specificity\, suggesting fine-tuned adaptation to distinct plant niches. We characterized two key mechanisms governing plant -microbe interactions. First\, we identified an efflux pump system prevale nt across Pseudomonadota that specifically facilitates Arabidopsis thali ana shoot colonization. By exploiting natural variation across A. thaliana  accessions\, we demonstrated that this pump selectively detoxifies gluco sinolate breakdown products\, suggesting commensal bacteria have evolved p rotection against collateral damage from plant defense responses targeting herbivores and pathogens. Second\, we discovered a unique adaptation in S phingomonas species involving dual copies of the flagellin gene (FliC). Wh ile one highly conserved copy triggers plant immune responses and mediates attachment\, the second\, more divergent copy enables motility and evade  immune recognition. This result is consistent with evolutionary conflict driving epitope recognition by the host. Our findings provide fundamental insights into the molecular mechanisms shaping plant microbiome assembly providing a framework for understanding and engineering plant-microbe as sociations.\n\n \;\n\n \;\n\nLooking forward to seeing you all\,\n \nInbal\n\n \;\n\nZoom link: https://technion.zoom.us/j/91374645319\n \n \;\n\n \;\n\nFor inquiries regarding the course\, please contac t Prof. Dedi Meiri <\;dmeiri@technion.ac.il>\; LOCATION:Faculty Of Biology Auditorium/ZOOM:https://technion.zoom.us/j/9137 4645319 END:VEVENT BEGIN:VTIMEZONE TZID:Asia/Jerusalem X-LIC-LOCATION:Asia/Jerusalem BEGIN:STANDARD DTSTART:20241027T010000 TZOFFSETFROM:+0300 TZOFFSETTO:+0200 TZNAME:IST END:STANDARD END:VTIMEZONE END:VCALENDAR