Publications des scientifiques de l'IRD

Zarik L., Meddich A., Hijri M., Hafidi M., Ouhammou A., Ouahmane L., Duponnois Robin, Boumezzough A. (2016). Use of arbuscular mycorrhizal fungi to improve the drought tolerance of Cupressus atlantica G.. Comptes Rendus Biologies, 339 (5-6), p. 185-196. ISSN 1631-0691.

Titre du document
Use of arbuscular mycorrhizal fungi to improve the drought tolerance of Cupressus atlantica G.
Année de publication
2016
Type de document
Article référencé dans le Web of Science WOS:000378095700005
Auteurs
Zarik L., Meddich A., Hijri M., Hafidi M., Ouhammou A., Ouahmane L., Duponnois Robin, Boumezzough A.
Source
Comptes Rendus Biologies, 2016, 339 (5-6), p. 185-196 ISSN 1631-0691
In this study, we investigated whether indigenous arbuscular mycorrhizal (AM) fungi could improve the tolerance of Cupressus atlantica against water deficit. We tested a gradient of watering regime spanning from 90% to 25% of soil retention capacity of water on mycorhized and non-mycorhized seedlings in pot cultures with sterilized and non-sterilized soils. Our result showed a positive impact of AM fungi on shoot height, stem diameter and biomass as well as on the growth rate. We also observed that inoculation with AM fungi significantly improved uptake of minerals by C. atlantica in both sterilized and non-sterilized soils independently of water regimes. We found that mycorhized plants maintained higher relative water content (RWC) and water potential compared with nonmycorhized plants that were subjected to drought-stress regimes (50% and 25% of soil retention capacity). The contents of proline and of soluble sugars showed that their concentrations decreased in non-mycorhized plants subjected to DS. Superoxide dismutase (SOD) and catalase (CAT) activities also decreased in non-mycorhized plants submitted to DS compared to mycorhized plants. The same pattern was observed by measuring peroxidase (POD) enzyme activity. The results demonstrated that AM fungal inoculation promoted the growth and tolerance of C. atlantica against DS in pot cultures. Therefore, mycorrhizal inoculation could be a potential solution for the conservation and reestablishment of C. atlantica in its natural ecosystem.
Plan de classement
Sciences du monde végétal [076] ; Biotechnologies [084]
Description Géographique
MAROC
Localisation
Fonds IRD [F B010067008]
Identifiant IRD
fdi:010067008
Contact