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Artículo

Azospirillum brasilense ameliorates the response of Arabidopsis thaliana to drought mainly via enhancement of ABA levels

Cohen, Ana CarmenIcon ; Bottini, Ambrosio RubénIcon ; Pontin, Mariela AnaIcon ; Berli, Federico JavierIcon ; Moreno, Daniela Maria del ValleIcon ; Boccalandro, Hernan EstebanIcon ; Travaglia, Claudia NoemiIcon ; Piccoli, Patricia NoemíIcon
Fecha de publicación: 05/2014
Editorial: Wiley
Revista: Physiologia Plantarum
ISSN: 0031-9317
Idioma: Inglés
Tipo de recurso: Artículo publicado

Resumen

Production of phytohormones is one of the main mechanisms to explain the beneficial effects of plant growth-promoting rhizobacteria (PGPR) such as Azospirillum sp. The PGPRs induce plant growth and development, and reduce stress susceptibility. However, little is known regarding the stress-related phytohormone abscisic acid (ABA) produced by bacteria. We investigated the effects of Azospirillum brasilense Sp 245 strain on Arabidopsis thaliana Col-0 and aba2-1 mutant plants, evaluating the morphophysiological and biochemical responses when watered and in drought. We used an in vitro-grown system to study changes in the root volume and architecture after inoculation with Azospirillum in Arabidopsis wild-type Col-0 and on the mutant aba2-1, during early growth. To examine Arabidopsis development and reproductive success as affected by the bacteria, ABA and drought, a pot experiment using Arabidopsis Col-0 plants was also carried out. Azospirillum brasilense augmented plant biomass, altered root architecture by increasing lateral roots number, stimulated photosynthetic and photoprotective pigments and retarded water loss in correlation with incremented ABA levels. As well, inoculation improved plants seed yield, plants survival, proline levels and relative leaf water content; it also decreased stomatal conductance, malondialdehyde and relative soil water content in plants submitted to drought. Arabidopsis inoculation with A. brasilense improved plants performance, especially in drought.
Palabras clave: Abscisic Acid , Azospirillum , Plant Growth Promoting Rhizobacteria , Water Restriction
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/22506
DOI: http://dx.doi.org/10.1111/ppl.12221
URL: http://onlinelibrary.wiley.com/doi/10.1111/ppl.12221/abstract
Colecciones
Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos(CCT - MENDOZA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MENDOZA
Articulos(IBAM)
Articulos de INST.DE BIOLOGIA AGRICOLA DE MENDOZA
Citación
Cohen, Ana Carmen; Bottini, Ambrosio Rubén; Pontin, Mariela Ana; Berli, Federico Javier; Moreno, Daniela Maria del Valle; et al.; Azospirillum brasilense ameliorates the response of Arabidopsis thaliana to drought mainly via enhancement of ABA levels; Wiley; Physiologia Plantarum; 153; 1; 5-2014; 79-90
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