Respuestas fisiológicas y bioquímicas de Pistacia atlantica Desf. aclimatada a la sequía frente al riego a corto plazo

  • Fethi Toul LaboratLaboratory of Biological Resources and Food Security, Faculty of Nature and Life Sciences, Tahri Mohamed University, Bechar, Algeria. Laboratory of Chemistry and Environmental Sciences, Tahri Mohamed University, Bechar, Algeriaory of Biological Resources and Food Security, Faculty of Nature and Life Sciences, Tahri Mohamed University, Bechar, Algeria https://orcid.org/0000-0002-5291-3026
  • Bouziane Terfaya Laboratory of Biological Resources and Food Security, Faculty of Nature and Life Sciences, Tahri Mohamed University, Bechar, Algeria https://orcid.org/0000-0002-6572-9586
  • Abdelkader Guenaia Laboratory of Biological Resources and Food Security, Faculty of Nature and Life Sciences, Tahri Mohamed University, Bechar, Algeria https://orcid.org/0000-0001-5498-9764
Palabras clave: Pistacia atlantica, estrés por sequía, marcadores bioquímicos, osmolitos, compuestos fenólicos

Resumen

Pistacia atlantica Desf. es una especie arbórea clave tolerante a la sequía en los ecosistemas hiperáridos del norte de África; sin embargo, se conoce poco sobre cómo sus osmólitos y su sistema antioxidante basado en compuestos fenólicos responden cuando la disponibilidad de agua mejora de manera transitoria. Este estudio evaluó los efectos a corto plazo del riego sobre los niveles de osmólitos, la composición fenólica y la actividad antioxidante en árboles de P. atlantica aclimatados a la sequía. Diez árboles adultos en la región de Igli (suroeste de Argelia) se asignaron a grupos no irrigados e irrigados. Se recolectaron hojas antes y después de 90 días de riego. El tamaño de muestra relativamente reducido refleja el número limitado de árboles disponibles y adecuados según los criterios del estudio en la zona. Se determinaron el contenido relativo de agua, la prolina, la glicina betaína, los fenoles totales y los compuestos fenólicos individuales (HPLC-DAD). Los resultados mostraron que el riego incrementó el contenido hídrico foliar en aproximadamente un 12 % y redujo significativamente la prolina (−25 %), la glicina betaína (−22 %) y los fenoles totales (−30 %), mientras que el IC₅₀ aumentó en un 25 %. Todos los compuestos fenólicos cuantificados disminuyeron tras el riego, con reducciones máximas de −24 a −27 % observadas en los ácidos clorogénico, ferúlico y p-cumárico, así como en la quercetina, mientras que los ácidos gálico, siríngico y elágico, junto con la naringenina, mostraron descensos más moderados (−8 a −16 %). La estrecha relación entre osmólitos, ácidos hidroxicinámicos clave y flavonoles, y la actividad antioxidante indica la existencia de una red de defensa integrada altamente sensible a la disponibilidad hídrica y fundamental para la resistencia a la sequía y la recuperación en esta especie.

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Publicado
2026-05-13
Cómo citar
Toul, F., Terfaya, B., & Guenaia, A. (2026). Respuestas fisiológicas y bioquímicas de Pistacia atlantica Desf. aclimatada a la sequía frente al riego a corto plazo. Revista De La Facultad De Agronomía De La Universidad Del Zulia, 43(2), e264328. Recuperado a partir de http://www.produccioncientifica.luz.edu.ve/index.php/agronomia/article/view/45607
Sección
Producción Vegetal