Taxonomy and Phylogeny of Endophytic Fungi (Chaetomiaceae) Associated with Healthy Leaves of Mangifera indica in Yunnan, China

Mangoes belong to Mangifera (Anacardiaceae), which contains 69 species, but only Mangifera indica is popularly cultivated and commercialized. Mango is one of the most important crops grown in China’s Yunnan Province and significantly contributes to the economic security of these locals. Endophytic fungi have been recognized as beneficial microbes that improve plant growth, productivity, and survivability under environmental stress. Nevertheless, many host plant-related endophytic fungi are yet to be identified, including the mango-related species. During this study, we recognized three different fungal species in the family Chaetomiaceae derived from healthy mango (Mangifera indica) leaves based on morphological examinations coupled with multi-gene phylogenetic analysis (ITS, LSU, rpb2, and tub2). These species are Dichotomopilus funicola (KUNCC23-13347) and Humicola wallefii (KUNCC22-10759, 23-13348), derived from new hosts, and a new species of Arcopilus hongheensis (KUNCC22-10767, 23-13346).