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UID:1006@biology.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20211115T130000

DTEND;TZID=Asia/Jerusalem:20211115T140000

DTSTAMP:20211118T110055Z

URL:https://biology.technion.ac.il/en/seminars/prof-idan-efroni-faculty-of
 -agriculture-food-and-environment-the-hebrew-university-of-jerusalem/

SUMMARY:Prof. Idan Efroni\, Faculty of Agriculture\, Food and Environment. 
 The Hebrew University of Jerusalem [No Categories]
DESCRIPTION:Location:   \n Affiliation: \n Host:\n TitleSame organ\, differ
 ent place - conserved regulation of a transient stem-cellstate in the init
 iation of multiple root types AbstractPlantsadjust their post-embryonic g
 rowth in response to environmental cues by formingnew organs in different 
 developmental contexts. Underground lateral rootsinitiate from prepatterne
 d cells in the main root\, but cells can also bypassthe root/shoot traject
 ory separation and generate shoot-borne-roots through anunknown mechanism.
  We mapped tomato (Solanum lycoperiscum)shoot-borne-roots development at s
 ingle-cell resolution and show that theyinitiate from differentiated phloe
 m-associated cells via a unique transitionalstem-cell-like state. This sta
 te required the activity of a transcriptionfactor which we named SHOOTBORN
 E ROOTLESS (SBRL). SBRL functionand regulation was deeply conserved in ang
 iosperms and phylogenetic analysisrevealed that it arose as an ancient dup
 licated superlocus with its paralogsshowing root-type-specific transient e
 xpression in wound-induced and lateralroot initiation. We propose a new mo
 del for root initiation in plants\, wherethe activation of a common transi
 tional stem-cells is controlled by multiplecontext-specific regulators. Th
 us\, the evolutionary expansion of theseregulators underlies the remarkabl
 e plasticity of plant root systems.Host: Sagi Levy and Sigal Savaldi-Golds
 tein 

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