Mawarni, Annisa2023-06-182023-06-182023-04PerpustakaanElfitrahttps://repository.unri.ac.id/handle/123456789/11021The genus Botryosphaeria, which can flourish in a range of climatic conditions worldwide, includes the endophytic fungus Botryosphaeria rhodina. This genus's antimicrobial activity has been reported in several of its species. This investigation aims to assess the antibacterial activity of an endophytic fungus, B. rhodina, from the mangrove root, Xylocarpus granatum J. Koenig, against Gram-positive and Gramnegative bacteria, including Listeria monocytogenes ATCC 7644, Salmonella typhimurium ATCC 14028, and Bacillus subtillis ATCC 19659. With a clear zone diameter ranging from 16 to 22 mm, the results of the antibacterial test using the well diffusion method revealed that the methanol extract at a concentration of 500 μg/mL had antibacterial activity in the strong to very strong category for all pathogenic bacteria tested. The L. monocytogenes bacteria had the largest clear zone, measuring 22.03 mm by 0.30 mm.enantibacterialendophyticfungusArticle