Effet du déficit hydrique au niveau de la phase photochimique du PSII chez deux variétés d'olivier

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 (ΨHb), quantum yield of PSII (ΦPSII), maximum quantum yield of PSII (Φmax PSII), electron transfer rate (JT) 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. To cite this article: M.F. Kasraoui et al., C. R. Biologies 329 (2006).