Medium pH, carbon and nitrogen concentrations modulate the phosphate solubilization efficiency of Penicillium purpurogenum through organic acid production

• DOI: 10.1111/j.1365-2672.2011.04972.x
• Publication Date: 2011-02-17T03:15:40Z
• Authors: J.M. Scervino; V.L. Papinutti; M.S. Godoy; M.A. Rodriguez; I. Della Monica; M. Recchi; M.J. Pettinari; A.M. Godeas
• Keywords: Calcium Phosphates; 2. Zero hunger; 0303 health sciences; 03 medical and health sciences; Solubility; Nitrogen; Penicillium; Hydrogen-Ion Concentration; Gluconates; Carbon; Soil Microbiology; Culture Media

To study phosphate solubilization in Penicillium purpurogenum as function of medium pH, and carbon nitrogen concentrations.Tricalcium (CP) efficiency P. was evaluated at acid or alkaline pH using different C N sources. Glucose- (NH(4) )(2) SO(4) -based media showed the highest P values followed by fructose. solubilizing ability higher cultures grown 6·5 than 8·5. Organic acids were detected both neutral media, but relative percentages each organic differed. Highest release coincided with production peak, especially gluconic acid. When grew nature concentration changed concentrations. A factorial categorical experimental design that P-solubilizing activity, coinciding production, corresponded to lowest concentration.The results described present show concentrations modulate through particularly In optimization studies, glucose sources allowed a high pH.This organism is potentially proficient soil inoculant, P-poor soils where other solubilizers fail soluble Further work necessary elucidate whether these can be extrapolated natural ecosystems, are present. could used develop bioprocess for manufacture phosphatic fertilizer calcium minerals.