Role of 9-Lipoxygenase and α-Dioxygenase oxylipin pathways as modulators of local and systemic defense

ABSTRACT: Plant 9-lipoxygenases (9-LOX) and α-dioxygenases (α-DOX) initiate the synthesis of oxylipins after bacterial infection. Here, the role of these enzymes in plant’s defense was investigated using individual Arabidopsis thaliana lox1 and dox1 mutants and a double lox1 dox1 mutant. Studies with Pseudomonas syringae pv tomato (Pst) revealed the enhanced susceptibility of lox1 to the virulent strain Pst DC3000 and the partial impairment of lox1 and dox1 mutants to activate systemic acquired resistance. Notably, both defects were enhanced in the lox1 dox1 plants as compared with individual mutants. We found that pre-treatment with 9-LOX- and -DOX-generated oxylipins protected plant tissues against bacterial infection. The strongest effect in this respect was exerted by 9-ketooctadecatrienoic ac

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Jorge Vicente 

PROVIDER: E-GEOD-34081 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress