title: Biocontrol and PGPR features in native strains isolated from saline soils of Argentina.
abstract: A bacterial collection of approximately one thousand native strains, isolated from saline soils of Cordoba province (Argentina), was established. From this collection, a screening to identify those strains showing plant growth promotion and biocontrol activities, as well as salt tolerance, was performed. Eight native strains tolerant to 1 M: NaCl and displaying plant growth promotion and/or biocontrol features were selected for further characterization. Strains MEP(2 )18, MRP(2 )26, MEP(2 )11a, MEP(3 )1, and MEP(3 )3b significantly increased the growth of maize seedlings under normal and saline conditions, whereas isolates ARP(2 )3, AEP(1 )5, and ARP(2 )6 were able to increase the root dry weight of agropyre under saline conditions. On the other hand, strains MEP(2 )18 and ARP(2 )3 showed antagonistic activity against phytopathogenic fungi belonging to Sclerotinia and Fusarium genus. Antifungal activity was found in cell-free supernatants, and it was heat and protease resistant. Strains MEP(2)18 and ARP(2)3 were identified as Bacillus sp. and strains MEP(2)11a and MEP(3)3b as Ochrobactrum sp. according to the sequence analysis of 16S rRNA gene.
authors: Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36-Km 601-5800, Río Cuarto-Córdoba, Argentina.
authors: Analía
authors: A
authors: Príncipe
authors: Florencia
authors: F
authors: Alvarez
authors: Marina G
authors: MG
authors: Castro
authors: Lucı F
authors: LF
authors: Zacchi
authors: Lucía
authors: L
authors: Zachi
authors: Sonia E
authors: SE
authors: Fischer
authors: Gladys B
authors: GB
authors: Mori
authors: Edgardo
authors: E
authors: Jofré
mesh_terms: D031702:Agropyron / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D001118:Argentina; D001419:Bacteria / Q000302:isolation & purification; D018407:Bacterial Physiological Phenomena; D004275:DNA, Ribosomal / Q000235:genetics; D005658:Fungi / Q000254:growth & development*; D010572:Pest Control, Biological; D010802:Phylogeny; D063245:Plant Development; D010935:Plant Diseases / Q000382:microbiology*; D018517:Plant Roots / Q000382:microbiology*; D017422:Sequence Analysis, DNA; D012965:Sodium Chloride / Q000494:pharmacology*; D012988:Soil Microbiology; D003313:Zea mays / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism
chemical_list: D004275:DNA, Ribosomal; D012965:Sodium Chloride
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