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Universitat Jaume I (2016)

Plant strategies to deal with a combination of drought and high temperatures

Izquierdo Zandalinas, Sara

Titre : Plant strategies to deal with a combination of drought and high temperatures.

Auteur : Izquierdo Zandalinas, Sara.

Université de soutenance : Universitat Jaume I

Grade : Doctoral Tesis 2016

Résumé
In natural environments, different abiotic stresses, including drought and high temperatures, simultaneously occur. Chapter 1 demonstrates that Carrizo citrange is more tolerant to the combination of these stresses than Cleopatra mandarin. Hormonal profile indicates that ABA content depends on its biosynthesis, catabolism and/or conjugation. Chapter 2 studies the primary and secondary metabolism of both citrus genotypes under drought, heat or their combination. Whereas Cleopatra deeply alters its metabolism in order to mitigate stress damages, the higher ability of Carrizo to tolerate adverse situations prevents further modifications of metabolism. Finally, Chapter 3 concludes that ABA is necessary for plant tolerance to this combined situation as well as for the accumulation of proteins (APX1, MBF1c and HSP101) required for plant acclimation to environmental adverse conditions

Mots Clés : carrizo citrange ; Cleopatra mandarin ; combined abiotic stress ; Arabidopsis thaliana ; abscisic acid ; ABI1 ; Biología molecular de plantas ; Biotecnología ; Fisiología vegetal ; Agricultura, ganadería, pesca, silvicultura y veterinaria ; 57

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Page publiée le 3 juillet 2018, mise à jour le 18 février 2019