Assessing th native arbuscular mycorrhizal symbioses to rehabilitate a degraded coastal sand dune in Algeria

2015

Article

Bouazza M.K., Ighilharizn Z., Lajudie Philippe de, Duponnois Robin, Bekki A.

International Journal of Agriculture and Crop Sciences, 2015, 8 (2), p. 194-202 ISSN 2227-670X

We examined local arbuscular mycorrhizal fungal (AMF) plant symbioses for their potential for land rehabilitation after sand industrial exploitation in a study site of the coastal sand quarry of Terga (NW Algeria, semi-arid climate). We focused on the mycorrhizal status of five representative plant species (Acacia saligna, Lotus creticus, Retama monosperma, Pistacia lentiscus and Juniperus oxycedrus) present in the Terga quarry. The arbuscular mycorrhizal (AM) structures showed significant and contrasting rates of root colonization among plant species. Spores density in soil was generally high, but variable depending on soil disturbance and local conditions. AMF diversity study in the rhizospheric soil fraction resulted in the distinction of eleven spore morphotypes affiliated to four genera (Glomus, Scutellospora, Gigaspora and Acaulospora) with predominance of Glomus. The mycorrhizal soil infectivity (MSI) level could be considered as significant except in the rhizosphere of R. monosperma. Our results suggest that A. saligna, L. creticus and P. lentiscus are well adapted to Terga local conditions and promote arbuscular mycorrhizal symbiosis. Management of mycorrhizal soil potential by introducing these species is very promising approach to contribute to degraded ecosystem rehabilitation such as in Terga. They may further constitute an important source of AM inoculum in semi-arid ecosystems.

Etudes, transformation, conservation du milieu naturel [082] ; Biotechnologies [084]

Fonds IRD [F B010069650]

fdi:010069650