[bioundgrd] FW: MIT Microbiome Club Seminar

[Joshua Stone]

From: Craig McLean <crmclean at mit.edu>
Subject: Re: MIT Microbiome Club Seminar

MIT Microbiome Club Seminar
[cid:ii_k1i8o7hd0]

Dr. Ali ​Ebrahimi
Cooperation and multicellularity determine polysaccharide degradation efficiency in marine bacteria

Tuesday, November 19th at 1:00PM in 56-614<https://whereis.mit.edu/?go=56>

Please RSVP via Eventbrite<https://www.eventbrite.com/e/microbiome-club-seminar-dr-ali-ebrahimi-cooperation-and-multicellularity-determine-polysaccharide-tickets-82031328913?utm_source=eb_email&utm_medium=email&utm_campaign=new_event_email&utm_term=viewmyevent_button>.

Microorganisms can cooperate by secreting public goods that benefit local neighbors; however, the conditions that favor cooperative growth in the environment, and the way in which this growth alters microbes’ contribution to ecosystem functions, remain unexplored. Here, we show that cooperation mediates the degradation of polysaccharide particles recalcitrant to hydrolysis in aquatic environments. Combining experiments and models, we define the physiological and environmental parameters that mediate the transition from cooperation to competition. Cooperation emerges through the self-organization of cells into ∼10- to 20-µm clusters that enable uptake of diffusible hydrolysis products. When cooperation is required, the degradation of recalcitrant biopolymers can only take place when degraders exceed a critical cell concentration, underscoring the importance of microbial interactions for ecosystem function.

Bio: Ali Ebrahimi is a Swiss National Science Foundation Fellow, working in the lab of Otto Cordero here at MIT. Before starting at MIT, he completed a BS in Chemical Engineering at Sahand University of Technology, a masters in chemical engineering at Sharif University of Technology, and a PhD in environmental system sciences ​at ETH Zurich University.
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The MIT Microbiome Club, part of the Center for Microbiome Informatics and Therapeutics, brings together inquisitive MIT undergrads, grad researchers, postdocs, faculty, and clinicians in the emerging field of microbiome studies and microbiome-based medicine. Learn more on our Facebook page. <https://www.facebook.com/MITmicrobiomeclub/> Or follow us on Twitter<https://twitter.com/MITubiomeclub>.





Craig McLean, PhD Student
MIT Microbiome Club
MIT-WHOI Joint Program
@MITubiomeclub<https://twitter.com/MITubiomeclub>

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