Diversité de champignons mycorhiziens arbusculaires d’un bas fond halomorphe.

Jmal, Z., Labidi, S., Dalpé, Y., Slim, S., Lounès-Hadj Sharaoui, A., and Ben Jeddi, F. (2015). "Diversité de champignons mycorhiziens arbusculaires d’un bas fond halomorphe.", Journal of New Sciences Agriculture and Biotechnology, 18(2), pp. 648-657.


Arbuscular mycorrhizal fungi (AMF) play a fundamental role in the survival of plant species in marginal soils, particularly low halomorphic funds (sebkhas). Twelve sites around a sebkha in north-eastern Tunisia were surveyed for flora diversity and soil characteristics. Arbuscular mycorrhizal fungi colonization was examined on the roots of sampled plants. The extraction of AMF spores from the soil samples was carried out in the spring period.The isolated spores were counted and seven AMF species were identified: Funneliformis geosporus, Rhizophagus irregularis, Claroideoglomus etunicatum, Funneliformis mosseae, Septoglomus constrictum, Rhizophagus diaphanus and Rhizophagus fasciculatus. Diversity of AMF and plant species in the investigated sites varied depending on soil salinity. The soil electrical conductivity ranged from 2.18 mS /cm (S5) to 98.67 mS /cm (S3). All studied sites, except S2, S5 and S8, were classified as very highly saline soils (> to 16 mS/cm).These later were characterized by the presence of the AMF species: Funneliformis geosporus and Claroideoglomus etunicatum. Only 29 on the 68 collected plant species presented arbuscular mycorrhizal structures in their roots. These plants belong to five botanical families: Asteraceae, Fabaceae, Oxalidaceae, Malvaceae and Poaceae. Fourty one percent of the sampled plants belongs to the Asteraceae family.

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