Pathogen affects plant growth, host health and productivity. Endophytes, presumed to live inside the plant tissues, might be helpful in sustaining the future of agriculture. Although recent studies have proven that endophytes can be pathogenic, commensal, non-pathogenic, and/or beneficial, this review will focus on the beneficial category only. Beneficial endophytes produce a number of compounds which are useful for protecting plants from environmental conditions, enhancing plant growth and sustainability, while living conveniently inside the hosts. The population of endophytes is majorly controlled by location, and climatic conditions where the host plant grows. Often the most frequently isolated endophytes from the tissues of the plant are fungi, but sometimes greater numbers of bacteria are isolated. Beneficial endophytes stand a chance to replace the synthetic chemicals currently being used for plant growth promotion if carefully explored by researchers and embraced by policymakers. However, the roles of endophytes in plant growth improvement and their behavior in the host plant have not been fully understood. This review presents the current development of research into beneficial endophytes and their effect in improving plant growth.

病原菌影响植物生长，宿主健康和生产力。据推测生活在植物组织内部的内生菌可能有助于维持农业的未来。尽管最近的研究证明内生菌可以是致病的，共生的，非致病性的和/或有益的，但本文仅关注有益的种类。有益的内生菌可产生许多化合物，这些化合物可用于保护植物免受环境条件的侵害，增强植物的生长和可持续性，同时可方便地生活在宿主体内。内生菌的种群主要受宿主植物生长的位置和气候条件的控制。通常从植物组织中分离出的最常见的内生菌是真菌，但有时会分离出大量细菌。如果研究人员仔细探索并得到政策制定者的支持，有益的内生菌就有机会替代目前用于促进植物生长的合成化学物质。然而，内生菌在植物生长改善中的作用及其在宿主植物中的行为尚未得到充分了解。这篇综述介绍了有益植物内生菌的最新研究及其在改善植物生长中的作用。