It has been also isolated from "Solanum nigrum" fungal endophyte "Aspergillus flavus". Certain fungal endophyte secondary metabolites have useful properties; an example of this is solamargine. The green alga "Entocladia perforans", an endophyte, depends on this eelgrass. Even below-ground herbivores such as nematodes and root-feeding insects are reduced by endophyte infection. This fungus is an endophyte of the mangrove plant "Sonneratia caseolaris". It can occur as an endophyte where it produces antiviral and antifungal secondary metabolites. In return for shelter, seed transmission, and nutrients the endophyte produces secondary metabolites. "C. acnes" has been found to be an endophyte of plants. In exchange the endophyte receives carbon for energy from the plant host. One such endophyte comes from the "Nodulisporium sp".