Abbas Y., Ducousso M., Abourouh M., Azcon R., Duponnois Robin. (2006). Diversity of arbuscular mycorrhizal fungi in Tetraclinis articulata (Vahl) Masters woodlands in Morocco. Annals of Forest Science, 63 (3), p. 285-291. ISSN 1286-4560.
Titre du document
Diversity of arbuscular mycorrhizal fungi in Tetraclinis articulata (Vahl) Masters woodlands in Morocco
Abbas Y., Ducousso M., Abourouh M., Azcon R., Duponnois Robin
Source
Annals of Forest Science, 2006,
63 (3), p. 285-291 ISSN 1286-4560
A survey of arbuscular mycorrhizal (AM) fungi was conducted in seven Tetraclinis woodlands. Microscopic analysis of the mycorrhizal status of T. articulata (Vahl) Masters roots revealed that all samples formed only AM, and no ectomycorrhizal fungi were detected. The mycorrhizal colonisation level was generally high (more than 80%), thus reflecting the mycotrophic nature of T. articulata. A "Paris-type" mycorrhizal structure was noted in all studied samples. The number of AM fungal spores detected in field-collected soils was relatively high. All recovered spores belonged to the Glomineae order, represented by Glomaceae and Acaulosporaceae families. Two groups were dominant: the first one included small (90 mu m), hyaline, white to dark-yellow spores, and the second involved large (295 mu m), light orange to dark orange-brown spores. The morphological characters indicated that the spore populations consisted of 3-6 morphotypes. The Glomus genus was represented by five species, i.e. Glomus aggregatum, Glomus constrictum, Glomus sp. 1, Glomus sp. 2, and Glomus sp. 3, while the Acaulospora genus was represented by only one unidentified species.
