Induced resistance by β-amino butyric acid (BABA) against fusarium stem and root rot of cucumber

One of the new methods in plant disease management is induced resistance. β- amino butyric acid (BABA) is a compounds that able to induce resistance in plants. In this study، induction of resistance by this compound against Fusarium oxysporum f. sp. radices-cucumerinum F42 on cucumber plants was studied. This compound significantly reduced severity of the disease through induced resistance. Quantitative analysis of the expression of LOX1and PR1 genes using QPCR was showed that PR1 gene was up regulated after challenging with pathogen in pretreated plants with BABA. This finding suggests the pathway implicated in the induction of resistance is dependent on salicylic acid. Evaluation of the expression of chitinase and beta-1، 3 - glucanase showed that BABA potentiated the expression of these genes upon challenging with pathogen.