Assessment of mycorrhizal fungal diversity in legumes (Medicago sativa, Medicago truncatula and Trifolium rubens) from Algeria and their influence on soil physicochemical and microbiological properties

Medicago sativa, Medicago truncatula and Trifolium rubens are legumes widely distributed in Algeria. These species hold ecological and agricultural significance and serve as a natural resource for combating desertification and as livestock fodder.

Comparative investigations of arbuscular mycorrhizal fungi (AMF) colonization in the roots of these leguminous species were conducted. The physicochemical and microbiological attributes of AMF's infectious potential were explored for all three species. The presence or absence of endomycorrhizal structures was assessed in these species.

The mycorrhizal infectious potential of the flora was significantly enhanced in the case of Medicago truncatula when compared to Trifolium rubens. Mycorrhization occurred at a frequency exceeding 80% in all three species. The impact of legume mycorrhizal fungi colonization on soil physicochemical properties was examined, revealing alterations in soil biological fertility, particularly in terms of phosphate and nitrogen content. Medicago truncatula exhibited a more pronounced positive influence on soil physical, chemical and microbiological characteristics when compared to Medicago sativa and Trifolium rubens. Consequently, these herbaceous species can be employed as nurse plants (facilitators) or as bio-fertilizers.