Changes in lipid, fatty acids and phospholipids composition of whole rice bran after solid-state fungal fermentation

• Published in: Bioresource technology 2011-09, Vol.102 (17), p.8335-8338
• Main Authors: Oliveira, Melissa dos Santos, Feddern, Vivian, Kupski, Larine, Cipolatti, Eliane Pereira, Badiale-Furlong, Eliana, de Souza-Soares, Leonor Almeida
• Format: Article
• Language: English
• Subjects: Biological and medical sciences; Biotechnology; Fatty acids; Fatty Acids - metabolism; Fermentation; Fermented bran; Food industries; Fundamental and applied biological sciences. Psychology; Fungi; Lipid fraction; Lipid Metabolism; Lipids; Methods. Procedures. Technologies; Microbial engineering. Fermentation and microbial culture technology; Oryza - metabolism; Oryza - microbiology; Oryza sativa; Phospholipids; Phospholipids - metabolism; Phytopathology. Animal pests. Plant and forest protection; Rhizopus oryzae; Rice; Unsaturated; Use and upgrading of agricultural and food by-products. Biotechnology
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2011.06.025

► A novel strain (Rhizopus oryzae CCT 7560) was used as fermentative agent. ► Our solid-state fermentative process increased phospholipids up to 130%. ► Our findings showed total fat decrease up to 45%. ► Saturated fatty acids decreased up to 20% after fermentation. ► Unsaturated fatty acids increase up to 5% after fermentation. The aim of this study was to evaluate fermented rice bran phospholipids, lipids and fatty acid content in a fermentation solid system with Rhizopus oryzae fungus. For this, aliquots were withdrawn every 24h over 120h. The content of phospholipids was determined by colorimetric method. Esterified fatty acids were separated by gas chromatography, then identified and quantified. The total lipids from fermented rice bran (FB) decreased from 20.4% to 11.2% in the range between 0h and 120h of fermentation while phospholipid contents were increased up to 2.4mgPglipid-1. In fermented bran, oleic, palmitic and linoleic acids prevailed, with a decrease in saturated fatty acids (20%) and increase in the unsaturated ones (5%). This study showed that rice bran fermentation with R. oryzae can be applied to the production of phospholipids altering the saturated to unsaturated fatty acid ratio.