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vol.34 número2CARACTERIZACIÓN GENÉTICA DE OLIVOS CENTENARIOS DEL NORTE DE CHILE: EL CASO DEL ACEITE DE OLIVA EXTRA VIRGEN DEL HUASCO EN PROCESO DE DENOMINACIÓN DE ORIGENRENDIMIENTO Y CALIDAD FISICOQUÍMICA EN LÍNEAS EXPERIMENTALES DE Solanum lycopersicum var. cerasiforme CULTIVADAS CON DIFERENTES NIVELES DE CONDUCTIVIDAD ELÉCTRICA índice de autoresíndice de materiabúsqueda de artículos
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Chilean journal of agricultural & animal sciences

versión impresa ISSN 0719-3882versión On-line ISSN 0719-3890

Resumen

ORTIZ-GALEANA, Magdalena A. et al. DIVERSITY OF CULTIVABLE ENDOPHYTIC BACTERIA ASSOCIATED WITH BLUEBERRY PLANTS (Vaccinium corymbosum L.) cv. Biloxi WITH PLANT GROWTH-PROMOTING TRAITS. Chil. j. agric. anim. sci. [online]. 2018, vol.34, n.2, pp.140-151. ISSN 0719-3882.  http://dx.doi.org/10.4067/S0719-38902018005000403.

The present work explores the diversity of cultivable endophytic bacteria associated with blueberry plants (Vaccinium corymbosum L.) cv. Biloxi, and characterizes their plant growth promoting activities, including the production of indoleacetic acid (AIA), biofilm, siderophores and proteolytic activity. Bacterial endophytes were isolated from different tissues of blueberry plants. A higher population density of endophytic bacteria was obtained from roots compared stems and leaves. BLAST and phylogenetic analysis, based on 16S ribosomal gene sequencing, showed the identification of 24 bacterial species distributed in 4 Phyla, such as Bacteroidetes (1.1%), Actinobacteria (23.9%), Firmicutes (12.5%) and Proteobacteria (62.5%). The most abundant genera were Pantoea, Pseudomonas, Burkholderia and Bacillus, among others. When analyzing some plant growth-promoting activities, 42% of the endophyte isolates showed at least one beneficial activity. Interestingly, some strains of Bacillus and Pantoea showed better production of phytohormones (AIA), biofilm and siderophores compared to the well-known PGPR Pseudomonas fluorescens UM270. These results show that the bacterial endophytes could play a beneficial role in blueberry plants, and be potentially used as bioinoculants in other crops of agricultural importance.

Palabras clave : bacterial endophytes; plant growth-promoting bacteria; genetic diversity; Vaccinium; blueberry.

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