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Genetic analysis of the rice jasmonate receptors reveals specialized functions for OsCOI2

Nguyen, Hieu Trang; Cheaib, Mohamad; Fournel, Marie; Rios, Maelle; Gantet, Pascal; Laplaze, Laurent; Guyomarc’h, Soazig; Riemann, Michael 1; Heitz, Thierry; Petitot, Anne-Sophie; Champion, Antony
1 Joseph Gottlieb Kölreuter Institut für Pflanzenwissenschaften (JKIP), Karlsruher Institut für Technologie (KIT)


COI1-mediated perception of jasmonate is critical for plant development and responses to environmental stresses. Monocots such as rice have two groups of COI genes due to gene duplication: OsCOI1a and OsCOI1b that are functionally equivalent to the dicotyledons COI1 and OsCOI2 whose function remains unclear. In order to assess the function of OsCOI2 and its functional redundancy with COI1 genes, we developed a series of rice mutants in the 3 genes OsCOI1a, OsCOI1b and OsCOI2 by CRISPR Cas9-mediated editing and characterized their phenotype and responses to jasmonate. Characterization of OsCOI2 uncovered its important roles in root, leaf and flower development. In particular, we show that crown root growth inhibition by jasmonate relies on OsCOI2 and not on OsCOI1a nor on OsCOI1b, revealing a major function for the non-canonical OsCOI2 in jasmonate-dependent control of rice root growth. Collectively, these results point to a specialized function of OsCOI2 in the regulation of plant development in rice and indicate that sub-functionalisation of jasmonate receptors has occurred in the monocot phylum.

Verlagsausgabe §
DOI: 10.5445/IR/1000162413
Veröffentlicht am 26.09.2023
DOI: 10.1371/journal.pone.0291385
Zitationen: 2
Web of Science
Zitationen: 2
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Joseph Gottlieb Kölreuter Institut für Pflanzenwissenschaften (JKIP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 1932-6203
KITopen-ID: 1000162413
Erschienen in PLOS ONE
Verlag Public Library of Science (PLoS)
Band 18
Heft 9
Seiten Art.-Nr.: e0291385
Vorab online veröffentlicht am 08.09.2023
Nachgewiesen in Web of Science
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