Fungal endophytes are fungi that live within the tissues of plants without causing any apparent harm to the host plant. These fungi have a mutualistic relationship with the host plant, providing benefits such as increased resistance to pathogens, improved tolerance to environmental stress, and enhanced nutrient uptake. Fungal endophytes have been found in a wide range of plant species and ecosystems, and their study is an important area of research in plant-microbe interactions, plant ecology, and agricultural practices. Researchers are interested in understanding the diversity, distribution, and functional roles of fungal endophytes in plants, as well as their potential applications in agriculture, biotechnology, and medicine.