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Bacillales Members from the Olive Rhizosphere Are Effective Biological Control Agents against the Defoliating Pathotype of Verticillium dahliae

AutorGómez-Lama Cabanás, Carmen ; Ruano-Rosa, David; Legarda, Garikoitz; Pizarro-Tobías, Paloma; Valverde-Corredor, Antonio ; Triviño, Juan Carlos; Roca, Amalia; Mercado-Blanco, Jesús
Fecha de publicación23-jun-2018
EditorMultidisciplinary Digital Publishing Institute
CitaciónAgriculture 8 (7): 90 (2018)
ResumenThe use of biological control agents (BCAs) is of interest within an integrated management strategy of Verticillium wilt of olive (VWO) caused by the soil-borne fungus <i>Verticillium dahliae</i> Kleb. Previous studies have shown that the root/rhizosphere of healthy olive plants is an important reservoir of microorganisms displaying biocontrol activity against VWO (i.e., <i>Pseudomonas</i> strains PICF7 and PIC141). Moreover, these BCAs are already adapted to the ecological niche where they are deployed. Three novel bacteria (strains PIC28, PIC73 and PIC167) from nursery-produced olive plants were in-depth characterized using a previously implemented approach consisting of in situ isolation, in vitro antagonism tests, in planta bioassays, phenotypic and metabolic characterization, genome analyses and in silico identification of traits involved in plant-bacteria interactions, and multi-locus sequence analyses. All strains displayed in vitro growth inhibition of different olive pathogens and biocontrol effectiveness against <i>Verticillium dahliae</i>, with strain PIC73 being the most effective BCA. Strains PIC73 and PIC167 were identified as <i>Paenibacillus polymyxa</i> (Prazmowski) Ash et al. and <i>Paenibacillus terrae</i> Yoon et al<i>.</i>, respectively. Strain PIC28 belongs to the <i>Bacillus</i> genus. Some of these <i>Bacillales</i> members showed in vitro compatibility with previously characterized BCAs (<i>Pseudomonas</i> spp. strains) also originating from the olive rhizosphere, paving the way for the future development of tailored bacterial consortia effective against VWO.
Identificadoresdoi: 10.3390/agriculture8070090
Aparece en las colecciones: Colección MDPI
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