Glycolipid biosurfactants: main properties and potential applications in agriculture and food industry

Abstract

Glycolipids, consisting of a carbohydrate moiety linked to fatty acids, are microbial surface active compounds produced by various microorganisms. They are characterized by high structural diversity and have the ability to decrease the surface and interfacial tension at the surface and interface, respectively. Rhamnolipids, trehalolipids, mannosylerythritol lipids and cellobiose lipids are among the most popular glycolipids. They have received much practical attention as biopesticides for controlling plant diseases and protecting stored products. As a result of their antifungal activity towards phytopathogenic fungi and larvicidal and mosquitocidal potencies, glycolipid biosurfactants permit the preservation of plants and plant crops from pest invasion. Also, as a result of their emulsifying and antibacterial activities, glycolipids have great potential as food additives and food preservatives. Furthermore, the valorization of food byproducts via the production of glycolipid biosurfactant has received much attention because it permits the bioconversion of byproducts on valuable compounds and decreases the cost of production. Generally, the use of glycolipids in many fields requires their retention from fermentation media. Accordingly, different strategies have been developed to extract and purify glycolipids. © 2016 Society of Chemical Industry

Microbial biosurfactants: current trends and applications in agricultural and biomedical industries

“…The high molecular weight biosurfactants include the lipopolysaccharides but those of main interest are the low molecular weight glycolipids and lipopeptides (LPs) and phospholipids. Of the glycolipids (Mnif and Ghribi ), which include trehalolipids, cellobiose lipids, mannosylerythritol lipids (MELs), rhamnolipids, (derived from mainly Pseudomonas ) and sophorolipids (SLs), (derived from Candida and related species) are of the most interest. The glycolipids (Marchant and Banat ) and the LPs (derived mainly from Bacillus sp.)…”

“…Previous reports on the effectiveness of B. subtilis SPB1 strain (HQ392822) revealed a wide spectrum of actions including antimicrobial activity towards micro‐organisms with MDR profiles (Ghribi et al . ), antifungal activity against phytopathogenic fungi (Mnif and Ghribi ) and antidiabetic and antilipidemic properties in alloxan‐induced diabetic rats (Zouari et al . ).…”

“…The focus of many reviews in the area has been on the biosurfactants themselves and indeed recent reviews include those, which have focussed specifically on applications in agriculture or industry (Mnif and Ghribi ; Santos et al . ; Singh et al .…”

Reductionin Listeria monocytogenes, Salmonella enterica and Escherichia coli O157:H7 in vitro and on tomato by sophorolipid and sanitiser as affected by temperature and storage time

“…Recently, it was shown that sophorolipids (SLs), which are types of biosurfactants, have potential applications in agriculture and the food industry and are effective for control of pathogenic bacteria (Mnif & Ghribi, 2016). Sophorolipids (SLs) are a type of biosurfactants and are extracellular glycolipids that are composed of sophorose (a disaccharide, 2-O-b-D-glucopyranosyl-b-D-glucopyranose) connected via a b-glycosidic linkage between the 1 0 hydroxy group of the sophorose and an x or x-1 hydroxy group located on the fatty acid.…”

Molecular species determination of oligosaccharides and glycoconjugates in soybean lecithin powders

“…Oligosaccharides and glycoconjugates, in the form of free sugars and glycolipids, are crucial in influencing the properties and functions of materials that include lecithin . High levels of oligosaccharides could induce a browning reaction and infusion reactions in such materials when stored and used for medical purposes.…”