title: Rock phosphate solubilization under alkaline conditions by Aspergillus japonicus and A. foetidus.
abstract: Aspergillus japonicus and A. foetidus were found to solubilize five types of Indian rock phosphates at pH 8 and 9. Solubilization was higher in the presence of pyrite than in controls lacking either pyrite or fungal inoculum. Both the aspergilli were found to be good pyrite solubilizers and could grow over a wide pH range. Solubilization of rock phosphates was the result of organic acid release and pyrite oxidation.
authors.affiliation: Department of Microbiology, University of Delhi South Campus, India.
authors.forename: R
authors.initials: R
authors.lastname: Singal
authors.forename: R
authors.initials: R
authors.lastname: Gupta
authors.forename: R K
authors.initials: RK
authors.lastname: Saxena
mesh_terms: D001230:Aspergillus / Q000145:classification / Q000302:isolation & purification / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007194:India; D007501:Iron / Q000378:metabolism; D008903:Minerals / Q000378:metabolism*; D010710:Phosphates / Q000378:metabolism*; D012988:Soil Microbiology; D012995:Solubility; D013045:Species Specificity; D013440:Sulfides / Q000378:metabolism
chemical_list: D008903:Minerals; D010710:Phosphates; D013440:Sulfides; C011342:pyrite; D007501:Iron