Physiological response of Phaseolus vulgaris L. bean to water stress in a split-root system.

Authors

  • J. F. Aguirre Colegio de Postgraduados. Instituto de Recursos Naturales.
  • J. Kohashi-Shibata Colegio de Postgraduados. Instituto de Recursos Naturales
  • C. L. Trejo Colegio de Postgraduados. Instituto de Recursos Naturales
  • Jorge Acosta-Gallegos INIFAP

DOI:

https://doi.org/10.15517/am.v10i1.17995

Abstract

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.

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References

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Published

2015-06-03

How to Cite

Aguirre, J. F., Kohashi-Shibata, J., Trejo, C. L., & Acosta-Gallegos, J. (2015). Physiological response of Phaseolus vulgaris L. bean to water stress in a split-root system. Agronomía Mesoamericana, 10(1), 31–36. https://doi.org/10.15517/am.v10i1.17995