Physiological response of Phaseolus vulgaris L. bean to water stress in a split-root system.
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| Autores: | , , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2015 |
| Descripción: | The objective of this research was to study the regulation of stomatal opening in beans, and to find whether it is caused by a decrease in the leaves’ water potential, or by a chemical factor in the roots. An experiment was carried out during 1997 in Montecillo, Mexico with the Cacahuate 72 variety, type I Nueva Granada breed. The experiment took place in a controlled environment chamber where plants had their roots split into two parts. Two irrigation treatments were applied twenty-seven days after sowing: a) irrigation, and b) irrigation/irrigation interruption. A system was created with 9-cm diameter and 50-cm high PVC tubes, divided vertically. Treatments lasted 15 days, and stomatal conductivity, hydric relations (water potential, osmotic potential, and turgid pressure), and proline content were quantified on a daily basis. Plants undergoing water stress showed a decrease in conductivity and a slight increase in proline content, and these plants did not show differences in hydric relations as compared to the ones undergoing irrigation. Results suggested that there is non-hydraulic communication between roots under water stress, and leaves under the same condition. |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/17995 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/agromeso/article/view/17995 |