Syracuse

Effect of treated wastewater irrigation and mycorrhizal inoculation on Olea europaea: Physiological, anatomical and morphological responses

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Ben Hassena, Ameni | Trabelsi, Lina | Zouari, Mohamed | Decou, Raphaël | Triki, Mohamed Ali | Khabou, Wahid | Labrousse, Pascal | Zouari, Nacim

Edité par CCSD ; Elsevier B.V -

International audience. This study evaluated the effects of irrigation with saline treated wastewater (TWW) (EC = 5.84 dS m−1) and inoculation with arbuscular mycorrhizal fungi (AMF) (Glomus deserticola, Gigaspora margarita or a combined inoculum of G. deserticola and G. margarita) on the physiological, anatomical and morphological performance of young olive plants (Olea europaea L. cv. Chetoui) over a 12-month period. Irrigation with TWW resulted in an increase in leaf water saturation deficit and water uptake capacity, along with a decrease in the membrane stability index, compared to control plants irrigated with tap water. Consequently, these changes negatively affected gas exchange parameters and total chlorophyll content, which were consistent with corresponding changes in leaf anatomy and morphology. However, principal component analysis (PCA) demonstrated that mycorrhizal symbiosis improved leaf water status and photosynthetic capacity, as compared to non-inoculated plants. These benefits were closely associated with enhanced anatomical and morphological traits in mycorrhizal plants. Overall, the results suggest that inoculated olive plants were less stressed and more resilient to the salinity stress caused by TWW irrigation.

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