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resumen

Resumen
Azospirillum brasilense is a well known plant growth-promoting rhizobacterium. Plant cell growth is constrained by the primary cell wall (CW) which contains polysaccharide-bound hydroxycinammic acids (HCAs). They derive from phenylpropanoid metabolism, which first step is the reaction catalyzed by phenylalanine ammonia-lyase (PAL; EC 4.3.1.24). Also CW peroxidases (FAPOD; EC 1.11.1.7) play a key role in the stiffening of the CW, and in the cessation of [ver mas...]
dc.contributor.authorDal Lago, Claudia Cristina
dc.contributor.authorCreus, Cecilia
dc.contributor.authorPereyra, María Alejandra
dc.date.accessioned2019-05-08T14:52:36Z
dc.date.available2019-05-08T14:52:36Z
dc.date.issued2015-06
dc.identifier.issn2158-2742
dc.identifier.issn2158-2750 (Online)
dc.identifier.other10.4236/ajps.2015.610165
dc.identifier.urihttp://hdl.handle.net/20.500.12123/5074
dc.identifier.urihttps://www.scirp.org/journal/PaperInformation.aspx?PaperID=57597
dc.description.abstractAzospirillum brasilense is a well known plant growth-promoting rhizobacterium. Plant cell growth is constrained by the primary cell wall (CW) which contains polysaccharide-bound hydroxycinammic acids (HCAs). They derive from phenylpropanoid metabolism, which first step is the reaction catalyzed by phenylalanine ammonia-lyase (PAL; EC 4.3.1.24). Also CW peroxidases (FAPOD; EC 1.11.1.7) play a key role in the stiffening of the CW, and in the cessation of cell elongation. Knowledge of the biochemical effects the bacteria could elicit into plant CW and how these responses could change the hypocotyl physiology still remains scarce. The objective of this work was to unravel the effects of A. brasilense Sp245 inoculation on HCAs of the primary CW in apical and basal segments of cucumber seedlings hypocotyls. Azospirillum inoculation increased hypocotyls’ length. Transferulate and p-coumarate were the major HCAs. Dimmers were detected only in the basal region of 13- and 15-d-old hypocotyls. The ratio t-ferulate/dimmer (an inverse index of CW cross-linking) was five times higher in inoculated seedlings. Enzyme activities determined were not directly involved in HCAs content changes. It was previously reported that the CW was a target for A. brasilense growth promotion. This work corroborates that the phenolics, FA, DFA, and p-coumarate bound to the CW are also involved in Azospirillum plant growth promoting strategies.eng
dc.formatapplication/pdfeng
dc.language.isoeng
dc.rightsinfo:eu-repo/semantics/openAccesses_AR
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.sourceAmerican journal of plant sciences 6 (10) : 1650-1661. (June 2015)eng
dc.subjectAzospirillumes_AR
dc.subjectPepinoes_AR
dc.subjectCucumberseng
dc.subjectFactores de Crecimientoes_AR
dc.subjectGrowth Factorseng
dc.subjectHipocotiloses_AR
dc.subjectHypocotylseng
dc.subjectPared Celulares_AR
dc.subjectCell Wallseng
dc.subjectHydroxycinnamic Acidseng
dc.subjectÁcidos Hidroxicinámicoses_AR
dc.titleAzospirillum growth promotion is related to changes in ferulate and dehydrodiferulate contents in cell wall of inoculated cucumber seedlings hypocotylseng
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.rights.licenseCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.description.origenEEA Balcarcees_AR
dc.description.filFil: Dal Lago, Claudia Cristina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agarias. Unidad Integrada. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce. Laboratorio de Bioquímica Vegetal y Microbiana; Argentinaes_AR
dc.description.filFil: Creus, Cecilia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce. Unidad Integrada. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agarias. Laboratorio de Bioquímica Vegetal y Microbiana; Argentinaes_AR
dc.description.filFil: Pereyra, María Alejandra. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agarias. Unidad Integrada. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce. Laboratorio de Bioquímica Vegetal y Microbiana; Argentinaes_AR
dc.subtypecientifico


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