n endophyte is an endosymbiont, often a bacterium or fungus, that lives within a plant for at least part of its life without causing apparent disease. Endophytes are ubiquitous and have been found in all the species of plants studied to date; however, most of these endophyte/plant relationships are not well understood.Many economically important grasses (e.g., Festuca spp., Lolium spp., Zea) carry fungal endophytes which enhance their growth,may improve the plant's to tolerate abiotic stresses such as drought, as well as improve their resistance to insect and mammalian herbivores.[6][7][8]