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http://cicy.repositorioinstitucional.mx/jspui/handle/1003/1389| Mechanisms of salt tolerance in habanero pepper plants (Capsicum chinense Jacq.): proline accumulation, ions dynamics and sodium root-shoot partition and compartmentation | |
| Emanuel Bojorquez Quintal ANA MARIA VELARDE BUENDIA ANGELA FRANCISCA KU GONZALEZ MILDRED RUBI CARRILLO PECH DANIELA ORTEGA CAMACHO Ileana de la Caridad Echevarría Machado IGOR POTTOSIN Manuel Martínez Estévez | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| 10.3389/fpls.2014.00605 | |
| H+-ATPASEION FLUXES PEPPER POTASSIUM RETENTION PROLINE ACCUMULATION ROOTS SALT TOLERANCE SODIUM COMPARTMENTALIZATION | |
| Despite its economic relevance, little is known about salt tolerance mechanisms in pepper plants. To address this question, we compared differences in responses to NaCl in two Capsicum chinense varieties: Rex (tolerant) and Chichen-Itza (sensitive). Under salt stress (150 mM NaCl over 7 days) roots of Rex variety accumulated 50 times more compatible solutes such as proline compared to Chichen-Itza. Mineral analysis indicated that Na(+) is restricted to roots by preventing its transport to leaves. Fluorescence analysis suggested an efficient Na(+) compartmentalization in vacuole-like structures and in small intracellular compartments in roots of Rex variety. At the same time, Na(+) in Chichen-Itza plants was compartmentalized in the apoplast, suggesting substantial Na(+) extrusion. Rex variety was found to retain more K(+) in its roots under salt stress according to a mineral analysis and microelectrode ion flux estimation (MIFE). Vanadate-sensitive H(+) efflux was higher in Chichen-Itza variety plants, suggesting a higher activity of the plasma membrane H(+)-ATPase, which fuels the extrusion of Na(+), and, possibly, also the re-uptake of K(+). Our results suggest a combination of stress tolerance mechanisms, in order to alleviate the salt-induced injury. Furthermore, Na(+) extrusion to apoplast does not appear to be an efficient strategy for salt tolerance in pepper plants. | |
| 12-11-2014 | |
| Artículo | |
| Frontiers in plant science, 5, p. 605, 2014. | |
| Inglés | |
| Bojórquez-Quintal, E., Velarde-Buendía, A., Ku-González, Á., Carillo-Pech, M., Ortega-Camacho, D., Echevarría-Machado, I., ... & Martínez-Estévez, M. (2014). Mechanisms of salt tolerance in habanero pepper plants (Capsicum chinense Jacq.): proline accumulation, ions dynamics and sodium root-shoot partition and compartmentation. Frontiers in plant science, 5, p. 605. | |
| BIOLOGÍA Y QUÍMICA | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | Artículos de Investigación Arbitrados |
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