Notwithstanding, certain limitations continue to hamper the potential of using these fungi as alternative candidates for the production of a variety of pharmaceutically important secondary metabolites (Priti et al., 2009). The instability of the expression of genes involved in the biosynthesis of desired metabolite(s) is a major limitation in the production of bioactive SMs in current fermentation practices using fungal endophytes (Pandey et al., 2014). Endophytic fungi, on the other hand, exhibit a typical tendency to lose their ability to produce secondary metabolites after repeated sub-culturing in axenic medium (Deepika et al., 2016). As a result of these, there is a need to develop techniques that can be used to activate cryptic biosynthetic pathways in order to increase SMs biosynthesis in fungal endophytes. One of such techniques is the genetic modulation of endophytes by UV light treatment.