Salicylic acid in plant defence-the players and protagonists

Current Opinion in Plant Biology

Volumn 10, Issue 5, 2007, Pages 466-472

  Loake, Gary ^a   Grant, Murray ^b  

^a UNIVERSITY OF EDINBURGH   (United Kingdom)

^b UNIVERSITY OF EXETER   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

SALICYLIC ACID; TRANSCRIPTION FACTOR;

GENE EXPRESSION REGULATION; METABOLISM; MICROBIOLOGY; PLANT; PLANT DISEASE; REVIEW;

GENE EXPRESSION REGULATION, PLANT; PLANT DISEASES; PLANTS; SALICYLIC ACID; TRANSCRIPTION FACTORS;

EID: 34948859039     PISSN: 13695266     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.pbi.2007.08.008     Document Type: Review

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51. •] this study begins to define a SA-signalling cascade. Arabidopsis MAP kinase 4 (MPK4) is a nodal kinase acting as a positive and negative regulator of SA and JA responses, respectively. A combination of forward and reverse genetics identified the MAP kinase kinase kinase, MEKK1, the MAP kinase kinase MKK1 and MAPK4 in a signalling complex reporting activation of basal defence and recruitment of SA defence pathways. In addition to genetically positioning the key defence regulators PAD4 and EDS1 downstream of MAPK4, a key target of MPK4, designated MKS1, was shown to be required for SA-dependent resistance in the mpk4 mutant but not to impact JA signalling. MSK1 interacts with the WRKY transcription factors WRKY25 and WRKY33, which are both required for SA-dependent defence gene expression.
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