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Abstract
Rhodes grass (Chloris gayana Kunth) is widely cultivated in the semi-arid tropics and favoured for salt tolerance; nevertheless, productivity decreases significantly under saline conditions, especially in tetraploid cultivars. The purpose of this work was to explore, in the tetraploid cultivar Boma, the physiological causes for such decrease. Experiments were carried out in vegetative plants in the greenhouse. At high salinity (200 mM NaCl), an early [ver mas...]
dc.contributor.authorDe Luca, Marcos Javier
dc.contributor.authorGarcía Seffino, L.
dc.contributor.authorGrunberg, Karina
dc.contributor.authorSalgado, M.
dc.contributor.authorCórdoba, Alicia R.
dc.contributor.authorLuna, Celina Mercedes
dc.contributor.authorOrtega, Leandro Ismael
dc.contributor.authorRodriguez, Andrés Alberto
dc.contributor.authorCastagnaro, Ana P.
dc.contributor.authorTaleisnik, Edith
dc.date.accessioned2020-06-23T12:17:21Z
dc.date.available2020-06-23T12:17:21Z
dc.date.issued2001
dc.identifier.issn0004-9409
dc.identifier.otherhttps://doi.org/10.1071/AR00190
dc.identifier.urihttp://hdl.handle.net/20.500.12123/7456
dc.identifier.urihttps://www.publish.csiro.au/cp/AR00190
dc.description.abstractRhodes grass (Chloris gayana Kunth) is widely cultivated in the semi-arid tropics and favoured for salt tolerance; nevertheless, productivity decreases significantly under saline conditions, especially in tetraploid cultivars. The purpose of this work was to explore, in the tetraploid cultivar Boma, the physiological causes for such decrease. Experiments were carried out in vegetative plants in the greenhouse. At high salinity (200 mM NaCl), an early reduction in leaf area expansion was observed, and, later, decreased dry matter accumulation, suggesting that the central effect of salinity was a limitation of leaf growth. This was evaluated in 2 closely related Boma clones, exhibiting different degrees of salt tolerance. Growth, ion accumulation and excretion, sugars, and proline concentrations were measured under a range of salt concentrations (0–200 mM NaCl). Differences between the clones in leaf expansion were expressed only at high salinity, but were not associated with differences in water potential or hydraulic conductance in the expanding region. At all salinity levels, the proportion of dry leaves was higher in the clone which also had lower salt gland density and Na excretion rates. Less efficient Na extrusion, associated with high oxidative stress, may be the main cause for leaf senescence and differences in productivity between these clones.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherCSIRO Publishinges_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceAustralian Journal of Agricultural Research 52 (9) : 903–910 (2001)es_AR
dc.subjectChloris gayanaes_AR
dc.subjectVariedadeses_AR
dc.subjectVarietieseng
dc.subjectSalinidades_AR
dc.subjectSalinityeng
dc.subjectVariación Genéticaes_AR
dc.subjectGenetic Variationeng
dc.subjectProductividades_AR
dc.subjectProductivityeng
dc.subject.otherGrama Rhodeses_AR
dc.subject.otherRhodes Grasseng
dc.titlePhysiological causes for decreased productivity under high salinity in Boma, a tetraploid Chloris gayana cultivares_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: De Luca, Marcos Javier. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentinaes_AR
dc.description.filFil: García Seffino, L. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentinaes_AR
dc.description.filFil: Grunberg, Karina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentinaes_AR
dc.description.filFil: Salgado, M. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Investigaciones Biológicas. Universidad Nacional de Tucumán. Instituto Superior de Investigaciones Biológicas; Argentinaes_AR
dc.description.filFil: Córdoba, Alicia R. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentinaes_AR
dc.description.filFil: Luna, Celina Mercedes. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentinaes_AR
dc.description.filFil: Ortega, Leandro Ismael. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentinaes_AR
dc.description.filFil: Rodriguez, Andrés Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentinaes_AR
dc.description.filFil: Castagnaro, Ana P. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Investigaciones Biológicas. Universidad Nacional de Tucumán. Instituto Superior de Investigaciones Biológicas; Argentinaes_AR
dc.description.filFil: Taleisnik, Edith. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentinaes_AR
dc.subtypecientifico


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