title: Field application of mycorrhizal bio-inoculants affects the mineral uptake of a forage legume (Hedysarum coronarium L.) on a highly calcareous soil.
abstract: The efficiency of two mycorrhizal bio-inoculants on the mineral uptake during the growth stages of a Mediterranean forage legume sulla (Hedysarum coronarium L.) was studied in the field on a highly calcareous soil. The first inoculum (Mm) was made up of a mixture of native arbuscular mycorrhizal fungi (AMF) isolated from calcareous soils: Septoglomus constrictum, Funneliformis geosporum, Glomus fuegianum, Rhizophagus irregularis and Glomus sp. The second was a commercial inoculum (Mi) containing one AMF species: R. irregularis. Both mycorrhizal inoculants increased total and arbuscular colonization of sulla roots. Inoculation with Mm showed a positive effect on sulla shoot dry weight (SDW) when compared to Mi and non-inoculated plants (control). Mineral contents (P, Mg, Mn, Fe) were higher in the shoots of sulla plants cultivated on mycorrhiza-inoculated plots compared to non-inoculated ones. This enhancement was observed during the flowering stage for P, Mg and Mn and during the rosette stage for Fe. An increase in P content of 50 % in plants inoculated with Mm compared to non-inoculated ones may be explained by the induction of root alkaline and acid phosphatase activities. Higher efficiency of native AMF species adapted to calcareous soils opens the way towards the development of mycorrhiza bio-fertilizers targeted to improve sustainable fertilization management in such soils.
authors.affiliation: Laboratoire des Sciences Horticoles, Institut National Agronomique de Tunisie, Université de Carthage, 43 Ave Charles Nicolle, 1082, Tunis, Mahrajène, Tunisie.
authors.forename: S
authors.initials: S
authors.lastname: Labidi
authors.forename: F Ben
authors.initials: FB
authors.lastname: Jeddi
authors.forename: B
authors.initials: B
authors.lastname: Tisserant
authors.forename: M
authors.initials: M
authors.lastname: Yousfi
authors.forename: M
authors.initials: M
authors.lastname: Sanaa
authors.forename: Y
authors.initials: Y
authors.lastname: Dalpé
authors.forename: A Lounès-Hadj
authors.initials: AL
authors.lastname: Sahraoui
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism; D000469:Alkaline Phosphatase / Q000378:metabolism; D004789:Enzyme Activation; D007887:Fabaceae / Q000378:metabolism* / Q000382:microbiology*; D008903:Minerals / Q000378:metabolism*; D038821:Mycorrhizae / Q000502:physiology*; D018517:Plant Roots / Q000378:metabolism / Q000382:microbiology; D018520:Plant Shoots / Q000378:metabolism / Q000382:microbiology; D012987:Soil / Q000737:chemistry*; D012988:Soil Microbiology
chemical_list: D008903:Minerals; D012987:Soil; D000469:Alkaline Phosphatase; D000135:Acid Phosphatase