As a slightly opened reservoir of special bio-resources, endophytes (microorganisms that reside in the internal tissues of living plants without causing any overt negative effects) have been demonstrated to be excellent producers of bioactive and structurally novel metabolites. A lot of novel bioactive products such as antibiotics, antiviral, anticancer, antidiabetic as well as antioxidant agents have been isolated from endophytes. Exopolysaccharides (EPS) produced by endophytes are also important metabolit...