title: [Effect of water deficit on the PSII photochemical phases in two olive trees varieties].
abstract: The effect of the water deficit, on two olive tree varieties 'Chetoui' and 'Chemlali' at the level of photosystem II photochemistry (PSII) was studied through the following parameters: leaf water potential (Psi(Hb)), quantum yield of PSII (PhiPSII), maximum quantum yield of PSII (Phi(max) PSII), electron transfer rate (J(T)) and photochemical quenching (qP). The results obtained show a reduction in the leaf water potential and a decrease in quantum efficiency of PSII. Besides, electron transfer rate and photochemical quenching showed an increase in response to water deficit. These modifications present some differences according to the variety. These observations are discussed in relation to the strategies developed to grow drought-resistant olive trees in arid areas.
authors.affiliation: Laboratoire d'arboriculture fruitière, Ecole supérieure d'horticulture et d'élevage de Chott-Mariem, 4042 Sousse, Tunisie. mohamed_fatn@yahoo.fr
authors.forename: Mohamed Faouzi
authors.initials: MF
authors.lastname: Kasraoui
authors.forename: Mohamed
authors.initials: M
authors.lastname: Braham
authors.forename: Mounir
authors.initials: M
authors.lastname: Denden
authors.forename: Hechmi
authors.initials: H
authors.lastname: Mehri
authors.forename: Marc
authors.initials: M
authors.lastname: Garcia
authors.forename: Thierry
authors.initials: T
authors.lastname: Lamaze
authors.forename: Faouzi
authors.initials: F
authors.lastname: Attia
mesh_terms: D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002734:Chlorophyll / Q000378:metabolism; D004579:Electron Transport; D005453:Fluorescence; D018527:Hydroponics; D031658:Olea / Q000502:physiology*; D010777:Photochemistry; D018515:Plant Leaves / Q000737:chemistry / Q000378:metabolism; D013045:Species Specificity; D014867:Water / Q000502:physiology*
chemical_list: D014867:Water; D002734:Chlorophyll