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CATEGORIES:Plant Sciences Departmental Seminars
SUMMARY:Multitrophic metabolism underlies plant-nematode i
 nteractions - Frank C. Schroeder\, Cornell Univers
 ity
DTSTART;TZID=Europe/London:20210121T130000
DTEND;TZID=Europe/London:20210121T140000
UID:TALK154642AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/154642
DESCRIPTION:Bacteria\, fungi\, and nematodes in the rhizospher
 e have profound impacts on all aspects of plant bi
 ology\, and small-molecule signaling is presumed t
 o play a central role in mediating these interacti
 ons. We found that ascaroside pheromones secreted 
 by plant-parasitic nematodes are metabolized by pl
 ants and associated microorganisms in a manner tha
 t can starkly alter the chemical message encoded b
 y these pheromones. For example\, comparative meta
 bolomics of monocots and dicots revealed that nema
 tode-derived ascarosides that are attractive to ot
 her nematodes are converted into derivatives that 
 confer repellency. An Arabidopsis mutant defective
  in two peroxisomal acyl-CoA oxidases does not met
 abolize ascr#18 and does not repel nematodes\, ind
 icating that plants\, like nematodes\, employ cons
 erved peroxisomal β-oxidation to edit ascarosides 
 and change their message. These findings suggest t
 hat plant-editing of nematode pheromones may repre
 sent a broadly conserved defense mechanism that ac
 ts in parallel to conventional pattern-triggered i
 mmunity. Moreover\, we found that\, in addition to
  triggering defense responses\, ascarosides can di
 rectly modulate plant growth and development.  Fun
 gi and some bacteria can also metabolize nematode-
 derived ascarosides\, demonstrating that plants an
 d microorganisms are part of a biosynthetic networ
 k that can actively modulate and interfere with ch
 emical signaling across phyla.\n\nContact receptio
 n@plantsci.cam.ac.uk for a Zoom link prior to a ta
 lk if you are not on our mailing list. Due to havi
 ng to go onine\, we are restricting the talks to U
 niversity of Cambridge and alumni to keep them as 
 informal as possible.
LOCATION:Online
CONTACT:
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