[Effect of water deficit on the PSII photochemical phases in two olive trees varieties].
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.
Kasraoui
Mohamed Faouzi
MF
Laboratoire d'arboriculture fruitière, Ecole supérieure d'horticulture et d'élevage de Chott-Mariem, 4042 Sousse, Tunisie. mohamed_fatn@yahoo.fr
Braham
Mohamed
M
Denden
Mounir
M
Mehri
Hechmi
H
Garcia
Marc
M
Lamaze
Thierry
T
Attia
Faouzi
F
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*
D014867:Water; D002734:Chlorophyll