INMIBO ( EX - PROPLAME)   14614
INSTITUTO DE MICOLOGIA Y BOTANICA
Unidad Ejecutora - UE
artículos
Título:
A foliar endophyte increases the diversity of phosphorus-solubilizing rhizospheric fungi and mycorrhizal colonization in the wild grass Bromus auleticus
Autor/es:
A.M. ARRIETA; L.J. IANNONE; J.M. SCERVINO; M.V. VIGNALE; M.V. NOVAS
Revista:
FUNGAL ECOLOGY
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2015
ISSN:
1754-5048
Resumen:
Asexual Epichlo?e endophytes establish mutualistic symbioses with grasses, improve fitnessof their hosts and modify the surrounding environment. To test the hypothesis that thissymbiotic association increases the abundance and diversity of phosphate-solubilizingfungi (PSF), a pot experiment was conducted combining two endophytic statuses: Epichlo?e-infected (Eþ) and non-infected (E) Bromus auleticus plants, and two soil types collectedfrom agricultural (A) and non-agricultural (NA) fields. Soil fungi were isolated at thebeginning of the experiment and 12 months after the introduction of B. auleticus, and testedfor their inorganic P (Pi)-solubilizing capability. Arbuscular mycorrhizal colonization in B.auleticus roots of Eþ and E plants was also analyzed. PSF abundance was affected by theendophytic status and by the type of soil; the highest value was detected in the ENAtreatment, followed by the EþA treatment. PSF diversity was higher in NA than in A soilsand higher in soils treated with Eþ than in those treated with E. Arbuscular mycorrhizalfungi colonization was higher in Eþ plants. We hypothesize that the positive associationbetween Epichlo?e endophytes and mycorrhizal fungi with an increase in the PSF diversitywould generate an increase in the phosphorus (P) available to plants.