Abscisic acid : emergence of a core signaling network

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DOIResolve DOI: http://doi.org/10.1146/annurev-arplant-042809-112122
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Journal titleAnnual Reviews Plant Biology
Pages651679; # of pages: 29
SubjectPP2C; pyrabactin; PYR/PYL; RCAR; SnRK2
AbstractAbscisic acid regulates numerous developmental processes and adaptive stress responses in plants. Many ABA signaling components have been identified, but their interconnections and a consensus on the structure of the ABA signaling network have eluded researchers. Recently, several advances have led to both the identification of ABA receptors and an understanding of how key regulatory phosphatase and kinase activities are controlled by ABA. A new model for ABA action has been proposed in which the soluble PYR/PYL/RCAR receptors function at the apex of a negative regulatory pathway to directly regulate PP2C phosphatases, which in turn directly regulate SnRK2 kinases. This model unifies many previously defined signaling components and highlights the importance of future work focused on defining the direct targets of SnRK2s and PP2Cs, dissecting the mechanisms of hormone interactions (i.e. cross-talk) and defining connections between additional known signaling components and this pathway, and determining how many other pathways control ABA signaling.
Publication date
AffiliationNRC Plant Biotechnology Institute; National Research Council Canada
Peer reviewedYes
NRC number50199
NPARC number18856992
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Record identifier7c223aee-20fd-4231-ac03-75d6cdd1aee2
Record created2012-03-30
Record modified2016-05-09
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