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UID:20250731T050307EDT-5906bvaA7l@132.216.98.100
DTSTAMP:20250731T090307Z
DESCRIPTION:Plant Science Research Horizons Seminar: guest speaker Dr. Marc
 us Samuel\, Department of Biological Sciences and Director of Greenhouse O
 perations\, University of Calgary.\n\nOnline on Zoom. Click here to partic
 ipate.\n\nSelf-incompatibility (SI) response is a genetic mechanism that a
 llows stigmas to reject self or genetically similar (incompatible) pollen\
 , while accepting non-self or cross (compatible) pollen to promote genetic
  diversity. On the dry stigmas of Brassicaceae\, this response is controll
 ed at the stigmatic surface where incompatible pollen are rejected by prev
 enting their hydration and germination. In contrast\, compatible pollen ar
 e provided the necessary resources by the stigmatic papillary cells to ger
 minate and penetrate the stigma. Through a proteomics approach followed by
  functional analysis of several candidates\, we have identified multiple c
 omponents downstream of the well-established interaction between the stigm
 a S-receptor kinase and the pollen-encoded SCR/SP11 ligand that converges 
 on the ARC1 E3 ligase. Our observations suggest that the main mode of SI i
 n the stigmatic papillae is through inhibition of vesicle trafficking to t
 he pollen attachment site that is required for pollen germination to occur
 \, thereby blocking growth of self or incompatible pollen. Other ongoing t
 ranslational research in canola to promote frost-tolerant degreening and t
 o enhance shatter tolerance will also be discussed.\n\nABOUT THE SPEAKER\n
 \nDr. Marcus Samuel is a Professor of Integrative Cell Biology (Plant Biol
 ogy) in the Department of Biological Sciences and the Director of Greenhou
 se Operations at the University of Calgary. Dr. Samuel received his PhD in
  Plant Biology from Brian Ellis’ lab at the University of British Columbia
  and did his post-doctoral fellowship at the University of Toronto with Da
 phne Goring\, working on self-incompatibility response in Brassicaceae. Dr
 . Samuel’s NSERC Discovery research program involves understanding cell-ce
 ll communication that occurs between the pollen and the stigma that is cru
 cial for successful reproduction in flowering plants. Dr. Samuel’s group i
 s also involved in translational research that focuses on trait improvemen
 t in canola through biotechnological solutions. Dr. Samuel is the recipien
 t of the 2017 CD Nelson for outstanding contributions to Plant Biology. Dr
 . Samuel’s research program is currently supported by Genome Alberta Funds
 \, NSERC-SPG\, NSERC-CRD\, NSERC-CREATE and industry funding from Frontier
  Agri-Sciences inc.\, Roullier Inc. and Nutrien Inc.\n\n \n
DTSTART:20210225T153000Z
DTEND:20210225T153000Z
LOCATION:Online
SUMMARY:Cell Signalling during Pollen-Pistil Interactions: Uncovering Novel
  Factors required For Mate Selection in Brassicaceae
URL:/macdonald/channels/event/cell-signalling-during-p
 ollen-pistil-interactions-uncovering-novel-factors-required-mate-selection
 -328686
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