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Pyoverdine use for the control of passion fruit bacterial blight PAB
Ribeiro,Carla Maria Cavalcanti; Souza,Giovanni Ribeiro de; Schurt,Daniel Augusto; Halfeld-Vieira,Bernardo de Almeida.
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.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Passiflora edulis; Pseudomonas; Xanthomonas axonopodis pv. passiflorae; Phylloplane; Siderophore.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001000956
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Standard area diagram set for bacterial spot assessment in fruits of yellow passion fruit Rev. Bras. Frutic.
Costa,Anne Pinheiro; Pires,Márcio de Carvalho; Peixoto,José Ricardo; Blum,Luiz Eduardo Bassay; Faleiro,Fábio Gelape.
Abstract This study developed and validated a standard area diagram set (SADs) for severity assessment of bacterial spot (Xanthomonas axonopodis pv. ) in passifloraefruits of yellow passion fruit (Passiflora edulis). The SADs consisted of eight severity levels (1%; 3%; 5%; 10%; 21%; 38%; 65%; and 80%). For its validation, 20 raters, who initially estimated the disease severity without the aid of the SADs, were divided into groups (G1 and G3, inexperienced; G2 and G4, experienced). Subsequently, G1 and G2 performed the second evaluation without the proposed SADs, and G3 and G4 completed the second evaluation using the proposed SADs. The accuracy and precision of the assessments were determined by simple linear regression and by the Lin’s concordance...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Passiflora edulis Sims; Xanthomonas axonopodis pv. passiflorae; Phytopathometry; Fruits.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000600401
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