One-step fermentation of pretreated rice straw producing microbial oil by a novel strain of Mortierella elongata PFY

► A novel strain of Mortierella elongate was screened. ► This strain can directly utilize pretreated rice straw without adding cellulase. ► The strain produced microbial oil in fermentation process. ► Cellulose in pretreated rice straw was utilized efficiently as the principal carbon source.