Pyoverdine use for the control of passion fruit bacterial blight

Uso de pioverdina no controle da mancha bacteriana do maracujazeiro

Abstract:

The objective of this work was to evaluate the effect of a bacterial filtrate containing pyoverdine on the population dynamics of Xanthomonas axonopodis pv. passiflorae, and the severity of passion fruit bacterial blight. The treatments were: King’s B medium solution; King’s B medium solution with 2 μmol L^-1 Fe²⁺ supplementation; and King’s B medium filtrate containing two concentrations of the siderophore pyoverdine produced by Pseudomonas sp. The filtrate containing pyoverdine at Abs₃₆₃ = 0.231 (highest concentration) reduces the number of cells of X. axonopodis pv. passiflorae, and at Abs₃₆₃= 0.115 and Abs = 0.231 significantly reduces the severity of bacterial blight.

Index terms:
Passiflora edulis; Pseudomonas; Xanthomonas axonopodis pv. passiflorae; phylloplane; siderophore