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L'effet du déficit hydrique, au niveau de la phase photochimique du photosystème II (PSII) chez deux variétés d'olivier à huile « Chetoui » et « Chemlali » a été étudié à travers les paramètres suivants : le potentiel hydrique foliaire de base (ΨHb), le rendement quantique du PSII (ΦPSII), le rendement quantique maximal du PSII (Φmax PSII), le taux du transfert des électrons (JT) et le quenching photochimique...