Molecular identification of arbuscular mycorrhizal fungal spores associated to the rhizosphere of Retama raetam in Tunisia |
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| Authors: | Mahdhi Mosbah De Lajudie Philippe Mars Mohamed |
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| Institution: | 1. Research Unit: Biodiversity and Valorization of Arid Areas Bioressources (BVBAA), Faculty of Sciences, Gabes University, Gabes, Tunisia;2. Centre for Environmental Research and Studies (CERS), Jazan University, Jazan, Saudi Arabiammahdhi@jazanu.edu.sa mosbahtn@yahoo.fr;4. Laboratoire des Symbioses Tropicales et M′editerran′eennes, Cirad/IRD/Inra/Agro-M/UM2 Campus-international de Baillarguet, Montpellier Cedex 5, France |
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| Abstract: | ABSTRACTArbuscular mycorrhizal fungi (AMF) are found in the soil of most ecosystems where they form mutualistic associations that affect plants growth. We have investigated the community structure of AMF associated to Retama raetam growing in five regions of Tunisia. The total number of spores was significantly different across sites, ranging from 633 to 1062 spores per 100 g dry soil. A dominance of small spores was revealed. The large subunit region of the rDNA of AMF spores associated to the rhizosphere of R. raetam was sequenced. Sequences clustered into 13 operational taxonomic units. Phylogenetic analysis revealed that the majority of sequences were grouped within Glomeraceae and Claroideoglomeraceae families. Only two sequences were affiliated to the Scutellospora genus. These results suggest the dominance of the genus Glomus in the soil rhizosphere of R. raetam. A correlation between phylogenetic analysis, soil chemicals properties, and AMF community richness was also detected. |
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| Keywords: | Arbuscular mycorrhizal fungi Glomus Retama raetam spores |
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