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Artículo

Plasticity in sunflower leaf and cell growth under high salinity

Céccoli, GabrielIcon ; Bustos, D.; Ortega, Leandro IsmaelIcon ; Senn, María EugeniaIcon ; Vegetti, Abelardo CarlosIcon ; Taleisnik, EdithIcon
Fecha de publicación: 01/2015
Editorial: Wiley
Revista: Plant Biology
ISSN: 1435-8603
Idioma: Inglés
Tipo de recurso: Artículo publicado

Resumen

A group of sunflower lines that exhibit a range of leaf Na+ concentrations under high salinity was used to explore whether the responses to the osmotic and ionic components of salinity can be distinguished in leaf expansion kinetics analysis. It was expected that at the initial stages of the salt treatment, leaf expansion kinetics changes would be dominated by responses to the osmotic component of salinity, and that later on, ion inclusion would impose further kinetics changes. It was also expected that differential leaf Na+ accumulation would be reflected in specific changes in cell division and expansion rates. Plants of four sunflower lines were gradually treated with a relatively high (130 mm NaCl) salt treatment. Leaf expansion kinetics curves were compared in leaves that were formed before, during and after the initiation of the salt treatment. Leaf areas were smaller in salt-treated plants, but the analysis of growth curves did not reveal differences that could be attributed to differential Na+ accumulation, since similar changes in leaf expansion kinetics were observed in lines with different magnitudes of salt accumulation. Nevertheless, in a high leaf Na+-including line, cell divisions were affected earlier, resulting in leaves with proportionally fewer cells than in a Na+-excluding line. A distinct change in leaf epidermal pavement shape caused by salinity is reported for the first time. Mature pavement cells in leaves of control plants exhibited typical lobed, jigsaw-puzzle shape, whereas in treated plants, they tended to retain closer-to-circular shapes and a lower number of lobes.
Palabras clave: Helianthus Annuus L. , Leaf Growth , Pavement Cell Shape , Salinity , Sunflower
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info:eu-repo/semantics/restrictedAccess 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/11336/37799
URL: http://onlinelibrary.wiley.com/doi/10.1111/plb.12205/abstract
DOI: http://dx.doi.org/10.1111/plb.12205
Colecciones
Articulos(CCT - CORDOBA) [3672]
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos(INFIVE) [160]
Articulos de INST.DE FISIOLOGIA VEGETAL
Articulos(IAL) [312]
Articulos de INSTITUTO DE AGROBIOTECNOLOGIA DEL LITORAL
Citación
Céccoli, Gabriel; Bustos, D.; Ortega, Leandro Ismael; Senn, María Eugenia; Vegetti, Abelardo Carlos; et al.; Plasticity in sunflower leaf and cell growth under high salinity; Wiley; Plant Biology; 17; 1; 1-2015; 41-51
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