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- Chemical priming of the plant stress response by cytokinin arabinosides
Cytokinin arabinosides (CK-A) are structurally similar to the plant hormone cytokinin but lack its growth regulatory activity. CK-As can induce pathogen-associated molecular patterns triggered immunity (PTI) in Arabidopsis thaliana (Bryksova et al., ACS Chem. Biol. 15, 1949–1963, 2020), indicating that CK-As might act as a chemical priming agent. Priming is the response of organisms to transient environmental (priming) stimuli in a way that prepares them for a better response to future stress. Priming may be caused by naturally occurring abiotic or biotic stresses; however, it can also be induced by chemicals. We are studying the ability of CK-As to prime Arabidopsis for defense against the hemibiotrophic pathogen Pseudomonas syringae pv. tomato DC3000 (Pst) and aim to elucidate the molecular mechanisms underlying priming by CK-As. This project is carried out by Martin Hönig (FEBS fellowship) in collaboration with the Department of Chemical Biology, Palacký University Olomouc.
Chemical structure of a
cytokinin arabinoside (CK-A).