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The origins and mechanisms of karrikin signalling
journal contributionposted on 2023-05-18, 11:10 authored by Waters, MT, Scaffidi, A, Flematti, GR, Steven SmithSteven Smith
Karrikins are butenolides in smoke and char that stimulate seed germination. Karrikin action in Arabidopsis requires the F-box protein MAX2 and the α/β-hydrolase KAI2, a paralogue of D14 that is required for perception of strigolactones (SL). SL response involves hydrolysis by D14, whereas karrikins bind to KAI2 without apparent hydrolysis. We discuss the current understanding of the mechanisms of karrikin perception and response. The usual function of KAI2 is unclear, but we hypothesise that the similarity between karrikins and the endogenous ligand for KAI2 made adaptation of some plants to karrikins possible.
Publication titleCurrent Opinion in Plant Biology
Department/SchoolSchool of Natural Sciences
PublisherCurrent Biology Ltd
Place of publication84 Theobalds Rd, London, England, Wc1X 8Rr
Rights statementCopyright 2013 Elsevier Ltd.