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Background and Aims: Experimental evidence in the literature suggests that O2•− produced in the elongation zone of roots and leaves by plasma membrane NADPH oxidase activity is required for growth. This study explores whether growth changes along the root tip induced by hyperosmotic treatments in Zea mays are associated with the distribution of apoplastic O2•−. Methods: Stress treatments were imposed using 150 mM NaCl or 300 mM sorbitol. Root elongation [ver mas...]
dc.contributor.authorBustos, Dolores Angela
dc.contributor.authorLascano, Hernan Ramiro
dc.contributor.authorVillasuso, Ana Laura
dc.contributor.authorMachado, Estela
dc.contributor.authorSenn, Eugenia
dc.contributor.authorCordoba, Alicia Beatriz
dc.contributor.authorTaleisnik, Edith
dc.date.accessioned2019-12-09T14:30:58Z
dc.date.available2019-12-09T14:30:58Z
dc.date.issued2008-10
dc.identifier.issn0305-7364
dc.identifier.issn1095-8290
dc.identifier.otherhttps://doi.org/10.1093/aob/mcn141
dc.identifier.urihttps://academic.oup.com/aob/article/102/4/551/166437
dc.identifier.urihttp://hdl.handle.net/20.500.12123/6474
dc.description.abstractBackground and Aims: Experimental evidence in the literature suggests that O2•− produced in the elongation zone of roots and leaves by plasma membrane NADPH oxidase activity is required for growth. This study explores whether growth changes along the root tip induced by hyperosmotic treatments in Zea mays are associated with the distribution of apoplastic O2•−. Methods: Stress treatments were imposed using 150 mM NaCl or 300 mM sorbitol. Root elongation rates and the spatial distribution of growth rates in the root tip were measured. Apoplastic O2•− was determined using nitro blue tetrazolium, and H2O2 was determined using 2′, 7′-dichlorofluorescin. Key Results: In non-stressed plants, the distribution of accelerating growth and highest O2•− levels coincided along the root tip. Salt and osmotic stress of the same intensity had similar inhibitory effects on root elongation, but O2•− levels increased in sorbitol-treated roots and decreased in NaCl-treated roots. Conclusions: The lack of association between apoplastic O2•− levels and root growth inhibition under hyper-osmotic stress leads us to hypothesize that under those conditions the role of apoplastic O2•− may be to participate in signalling processes, that convey information on the nature of the substrate that the growing root is exploring.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherOxford Academic Presses_AR
dc.rightsinfo:eu-repo/semantics/openAccesses_AR
dc.sourceAnnals of Botany 102 (4) : 551–559 (October 2008)es_AR
dc.subjectMaízes_AR
dc.subjectMaizeeng
dc.subjectZea Mayses_AR
dc.subjectEstrés Osmóticoes_AR
dc.subjectOsmotic Stresseng
dc.subjectEnraizamientoes_AR
dc.subjectRootingeng
dc.subjectEspecies de Oxígeno Reactivoes_AR
dc.subjectReactive Oxygen Specieseng
dc.subject.otherEstres Salinoes_AR
dc.titleReductions in Maize Root-tip Elongation by Salt and Osmotic Stress do not Correlate with Apoplastic O2•− Levelses_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.origenInstituto de Fisiología y Recursos Genéticos Vegetaleses_AR
dc.description.filFil: Bustos, Dolores Angela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentinaes_AR
dc.description.filFil: Lascano, Hernan Ramiro. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina.es_AR
dc.description.filFil: Villasuso, Ana Laura. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Físicas, Químicas y Naturales. Química Biológica; Argentinaes_AR
dc.description.filFil: Machado, Estela. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Físicas, Químicas y Naturales. Química Biológica; Argentinaes_AR
dc.description.filFil: Senn, Eugenia. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina.es_AR
dc.description.filFil: Cordoba, Alicia Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina.es_AR
dc.description.filFil: Taleisnik, Edith. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina.es_AR
dc.subtypecientifico


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