Abstract
Cassava, one of the most important crops in the tropics is positively affected by the association with Arbuscular Mycorrhizal Fungi (AMF). Such association is greatly influenced by the nature of the existing local AMF community. Here, we characterized AMF communities in soils from cassava fields in Andom and Bityili villages, located in Eastern and Southern Cameroon, respectively, by Illumina MiSeq of the ITS2 region. Soil characteristics involved marked changes in soil available P and slight differences in other nutrients availability and soil pH. Clustering based on a 97% sequence similarity generated 60 AMF Operational taxonomic units (OTU) grouped into the 12 genera Paraglomus, Claroideoglomus, Rhizophagus, Kamienskia, Funneliformis, Dominikia, Glomus, Ambispora, Archaeospora, Dentiscutata, Acaulospora, and Redeckera. Fifteen AMF species were identified from the 27 OTU, and they were dominated by Glomus sinuosum and Paraglomus occultum in both sites. The Andom soil which had less available P showed a higher AMF diversity and contained 10 site-specific species, compared to the Bityili soil where only 2 site-specific species were recovered. Multivariate analysis indicated that soil available P and C/N ratio were the main edaphic factors influencing the structure AMF in the study sites. This study provided useful information on the composition of AMF community in cassava field soils in two agro-ecologies of Cameroon.
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