Antioxidant status, biochemical and hormonal responses involved in the response of Olea europaea L. to water deficit induced by PRD irrigation
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Otros documentos de la autoría: Abboud, Samia; Vives-Peris, Vicente; Dbara, Soumaya; Gomez-Cadenas, Aurelio; Perez-Clemente, Rosa Maria; Abidi, Walid; Braham, Mohamed
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Título
Antioxidant status, biochemical and hormonal responses involved in the response of Olea europaea L. to water deficit induced by PRD irrigationAutoría
Fecha de publicación
2020Editor
ElsevierISSN
0304-4238Cita bibliográfica
ABBOUD, Samia, et al. Water status, biochemical and hormonal changes involved in the response of Olea europaea L. to water deficit induced by partial root-zone drying irrigation (PRD). Scientia Horticulturae, vol. 276, p. 109737Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://www.sciencedirect.com/science/article/pii/S0304423820305653Versión
info:eu-repo/semantics/submittedVersionPalabras clave / Materias
Resumen
Changes in antioxidant status, biochemical and hormonal responses, were investigated in three
olive cultivars (Arbequina, Arbosana and Chetoui) grown in a super-high-density orchard under
partial root-zone drying ... [+]
Changes in antioxidant status, biochemical and hormonal responses, were investigated in three
olive cultivars (Arbequina, Arbosana and Chetoui) grown in a super-high-density orchard under
partial root-zone drying (PRD) irrigation. Four irrigation treatments were applied during two
growing seasons (2015 and 2016); control treatment (100% ETC) irrigated at 100% of crop
evapotranspiration on both parts of the root-zone and three PRD irrigation treatments (100%
PRD, 75% PRD and 50% PRD) irrigated at 100%, 75%, and 50% of crop evapotranspiration
only on one alternated part of the root-zone. The results indicated that the three studied olive
cultivars showed a clear difference in their response to PRD irrigation.
In fact, PRD irrigation has led to a strong activation of secondary metabolites with antioxidant
properties such as pigments, phenols and flavonoids. Other metabolic changes, including the
accumulation of soluble sugars and proline have been also triggered by PRD irrigation. Among
the studied cultivars, Arbequina displayed the highest levels for proline, total soluble sugars,
phenols and flavonoids, and the lowest ones for MDA and H2O2.
The increase in SOD, CAT and POD activity and the reduction and PPO activity under PRD
irrigation were more pronounced in 2016 season with highest activities obtained from cultivar
Arbequina.
For all the three cultivars, PRD irrigation increased phytohormones concentration in both, roots
and leaves and the highest levels were recorded in 2016. In leaves, Arbequina showed the lowest
levels of ABA and the highest levels of JA, SA and IAA. PRD irrigation also induces a higher
accumulation of ABA, JA and IAA in dried roots than in wetted ones.
Taken together, biochemical mechanisms induced by PRD irrigation were more effective in
Arbequina suggesting better protection of their foliar functions compared to other cultivars and
its higher adaptability to PRD. [-]
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Scientia Horticulturae, vol. 276, p. 10973Derechos de acceso
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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