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(CS-27-5) A signaling circuitry maintains cell integrity during hormone induced cell expansion.

Tuesday, August 8, 2023
4:20 PM - 4:40 PM EDT
Location: Meeting Room 105-106

    Symposium Speaker(s)

  • Ajeet Chaudhary, PhD (he/him/his)

    Postdoc
    Department of Plant Biology, Carnegie Institution for Science, Stanford
    Palo Alto, California

    • Abstract Co-Author(s)

  • Zhiyong Wang, Ph.D

    Senior Staff Scientist
    Department of Plant biology, Carnegie institute for Science, Stanford
    Stanford, California

Body of Abstract: Brassinosteroids (BR) is a growth-promoting hormone that regulates cell elongation to facilitate tissue morphogenesis in Arabidopsis thaliana. During rapid cell elongation, the cell wall is stretched under turgor pressure and can be damaged. How plant cells maintain integrity during hormone-induced cell expansion is not understood. Here, we show that BR regulates cell integrity by modulating the activity of the cell integrity component FERONIA (FER) receptor kinase. BR increases the level of plasma-membrane-localized FER, which is required for cell integrity of BR-treated tissues. Moreover, GSK3 kinase BIN2 directly interacts with, phosphorylates, and alters the accumulation of FER. Our results show that BR regulates cell integrity by controlling FER.