Activation of induced systemic resistance in grapevine “Thompson Seedless”, response Pseudomonas veronii R4

Abstract

The main objective was to evaluate the mechanism of RSI to “Thompson Seedless” for stimulus (Lox2, Tlp1, Npr1, Eir1) genes. Activation of defense genes for leaves and roots were checked, showing the systemic activation by inoculation of P. veronii R4 in ‘Thompson Seedless’. Observed by q-PCR gene expression Lox2 in vine leaves with progressive increase up (12 h post inoculation) sampling, analyzing this same gene in roots did not exist any stimulus. The transcriptional levels of genes Tlp1 Eir1 and were stimulated only in roots when exposed to R4. Stimulus levels Tlp1 relates gene having R4 skill in symbiosis develop complex induced via the ethylene (ET). Stimulation levels were constituent Npr1 gene in leaves and roots, with no signi cant differences between plants treated with PBS or R4. The results show that R4, contact roots of ‘Thompson Seedless’, stimulate the expression of Eir1, Lox2, Tlp1 genes to 5 min, 6 and 12 h post inoculation, allowing establish the effectiveness of RSI strain led R4 in “Thompson Seedless” giving a state of pre-alert.