Production of antifungal compounds by Bacillus spp. isolates and its capacity for controlling citrus black spot under field conditions

Autor(es)

Kupper, Katia Cristina ^[1] ; Moretto, Rafael Kupper ^[2] ; Fujimoto, Andreia ^[3]

Afiliação do(s) autor(es)

^[1] Ctr Avancado Pesquisa Citros Sylvio Moreira, Inst Agronom, BR-13490970 Cordeiropolis Sao Paulo - Brazil

^[2] Univ Fed Sao Carlos, Programa Posgrad Prod Vegetal & Bioproc Associado, BR-13600970 Araras Sao Paulo - Brazil

^[3] Univ Estadual Paulista, Programa Microbiol Agropecuaria, BR-14884900 Jaboticabal, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY; v. 36, n. 1 DEC 16 2019.
• Citações Web of Science: 0

Resumo

Orange juice is a major agricultural product, and oranges are among the most widely sold fresh fruits in several countries. Citrus black spot (CBS), caused by the fungus Phyllosticta citricarpa, affects almost every species of citrus, causing a esthetic depreciation of the fruit and fruit drop, with consequent financial loss for its in natura commercialization. Fungicides are the major control measure for CBS, but have limited efficiency and high cost, and give rise to fungal strains resistant to these products. This work assayed the production of antifungal compounds by Bacillus spp. isolates and tested the potential of two isolates from B. subtilis (ACB-AP3 and ACB-83) for controlling CBS under field conditions with two previously untested orange varieties. A total of 15 isolates produced cell-free, thermostable or volatile compounds effective in suppressing P. citricarpa growth in vitro. It was possible to detect the production of two antibiotics (iturin and surfactin) by B. subtilis ACB-83. Additionally, B. subtilis isolates ACB-AP3 and ACB-83 displayed significant effects in controlling the disease under field conditions. (AU)

• Processo FAPESP: 08/56390-3 - Utilização de microrganismos para controle de doenças fúngicas dos citros
• Beneficiário: Katia Cristina Kupper
• Modalidade de apoio: Auxílio à Pesquisa - Regular