Evolution of acid value with time for the PGPR synthesis catalysed by free lipases from different sources [65]. (a) ◆  Aspergillus sp.; ■  Candida antarctica; ×  Candida cylindracea; ▲  Mucor miehei; +  Pseudomonas cepacia. (b) ◆  Candida lipolytica; ■  Mucor javanicus; ×  Penicillium roquefortii; ▲  Pseudomonas fluorescens (300 U/mg solid); +  Rhizomucor miehei. (c) ◆  Pseudomonas fluorescens (40 U/mg solid); ■  Porcine pancreas; ×  Rhizopus niveus; ▲  Rhizopus arrhizus; +  Aspergillus oryzae. (d) ◆  Wheat germ; ■  Chromobacterium viscosum; ×  Pseudomonas sp. (1200 U/mg solid); ▲  Pseudomonas sp. Type B (≥60 U/mg solid); +  Rhizopus oryzae.