Elongation growth in leaf blades of Chloris gayana under saline conditions
In Chloris gayana, salinity-associated yield decreases are due mainly to leaf area reductions. To understand the physiological basis for such reduction, the effects of salinity were studied on the spatial and temporal distribution of extension in the intercalary meristem at the leaf base, and on hyd...
| Main Authors: | , |
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| Format: | Artículo |
| Language: | Inglés |
| Published: |
Elsevier
2020
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.12123/7463 https://www.sciencedirect.com/science/article/pii/S0176161704704320 https://doi.org/10.1078/0176-1617-00827 |
| _version_ | 1855484014508376064 |
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| author | Ortega, Leandro Ismael Taleisnik, Edith |
| author_browse | Ortega, Leandro Ismael Taleisnik, Edith |
| author_facet | Ortega, Leandro Ismael Taleisnik, Edith |
| author_sort | Ortega, Leandro Ismael |
| collection | INTA Digital |
| description | In Chloris gayana, salinity-associated yield decreases are due mainly to leaf area reductions. To understand the physiological basis for such reduction, the effects of salinity were studied on the spatial and temporal distribution of extension in the intercalary meristem at the leaf base, and on hydraulic conductance in that zone. C. gayana plants were grown on sand irrigated with Hoagland solution with the addition of 0 or 200 mmol/L NaCl, and all measurements were performed on tiller leaf four. In salinised plants, that leaf was 20 percnt; shorter than in controls. Extension in the blade expansion zone was studied by pricking through the leaf sheaths and analysing the displacement of the pricks. In salt-treated plants, maximum growth rates were depressed by 53 percnt; and the growth zone was shorter by approximately 10 mm, nevertheless, extension proceeded for a longer period than in control plants. The analysis of specific leaf areas in the expansion zone suggests the rate of dry matter deposition was lowered by salinity and estimations of tissue displacement time within that zone suggest cell wall maturity was delayed. Hydraulic conductance was reduced by salinity and this may be the main cause for reduced growth under salinity in Chloris gayana. |
| format | Artículo |
| id | INTA7463 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA74632020-06-23T17:33:05Z Elongation growth in leaf blades of Chloris gayana under saline conditions Ortega, Leandro Ismael Taleisnik, Edith Chloris gayana Estrés Osmótico Desarrollo Foliar Rendimiento Salinidad Osmotic Stress Leaf Development Yields Salinity Grama Rhodes Estrés Salino Rhodes Grass In Chloris gayana, salinity-associated yield decreases are due mainly to leaf area reductions. To understand the physiological basis for such reduction, the effects of salinity were studied on the spatial and temporal distribution of extension in the intercalary meristem at the leaf base, and on hydraulic conductance in that zone. C. gayana plants were grown on sand irrigated with Hoagland solution with the addition of 0 or 200 mmol/L NaCl, and all measurements were performed on tiller leaf four. In salinised plants, that leaf was 20 percnt; shorter than in controls. Extension in the blade expansion zone was studied by pricking through the leaf sheaths and analysing the displacement of the pricks. In salt-treated plants, maximum growth rates were depressed by 53 percnt; and the growth zone was shorter by approximately 10 mm, nevertheless, extension proceeded for a longer period than in control plants. The analysis of specific leaf areas in the expansion zone suggests the rate of dry matter deposition was lowered by salinity and estimations of tissue displacement time within that zone suggest cell wall maturity was delayed. Hydraulic conductance was reduced by salinity and this may be the main cause for reduced growth under salinity in Chloris gayana. Instituto de Fisiología y Recursos Genéticos Vegetales Fil: Ortega, Leandro Ismael. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentina. Fil: Taleisnik, Edith. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentina. 2020-06-23T17:21:37Z 2020-06-23T17:21:37Z 2003 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/7463 https://www.sciencedirect.com/science/article/pii/S0176161704704320 0176-1617 https://doi.org/10.1078/0176-1617-00827 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Journal of Plant Physiology 160 (5) : 517-522 (2003) |
| spellingShingle | Chloris gayana Estrés Osmótico Desarrollo Foliar Rendimiento Salinidad Osmotic Stress Leaf Development Yields Salinity Grama Rhodes Estrés Salino Rhodes Grass Ortega, Leandro Ismael Taleisnik, Edith Elongation growth in leaf blades of Chloris gayana under saline conditions |
| title | Elongation growth in leaf blades of Chloris gayana under saline conditions |
| title_full | Elongation growth in leaf blades of Chloris gayana under saline conditions |
| title_fullStr | Elongation growth in leaf blades of Chloris gayana under saline conditions |
| title_full_unstemmed | Elongation growth in leaf blades of Chloris gayana under saline conditions |
| title_short | Elongation growth in leaf blades of Chloris gayana under saline conditions |
| title_sort | elongation growth in leaf blades of chloris gayana under saline conditions |
| topic | Chloris gayana Estrés Osmótico Desarrollo Foliar Rendimiento Salinidad Osmotic Stress Leaf Development Yields Salinity Grama Rhodes Estrés Salino Rhodes Grass |
| url | http://hdl.handle.net/20.500.12123/7463 https://www.sciencedirect.com/science/article/pii/S0176161704704320 https://doi.org/10.1078/0176-1617-00827 |
| work_keys_str_mv | AT ortegaleandroismael elongationgrowthinleafbladesofchlorisgayanaundersalineconditions AT taleisnikedith elongationgrowthinleafbladesofchlorisgayanaundersalineconditions |