EVALUATION OF THE METABOLIC PRODUCTION OF THE ENDOPHYTIC FUNGUS Phomopsis sp.

Endophytic microorganisms have been shown to be an important source of bioactive compounds, and much has been studied about their metabolites. For example, compounds with different biological activities have been isolated from Phomopsis sp. The metabolic study of this genus may lead to a better understanding of the routes of production of metabolites of interest. The aim of this study was to map the metabolic profile of Phomopsis sp., isolated as an endophyte of Syzygium jambolanum DC, using culture filtrate. The fungus was cultivated for six weeks in potato dextrose medium under hypoxia and at room temperature. The filtrate was collected weekly, and the analyses were performed using proton nuclear magnetic resonance (1H NMR) spectroscopy by applying NOESY1D with suppression of the water signal. The occurrence of reductive routes was verified: alcoholic fermentation throughout cultivation and reductive tricarboxylic acid cycle in the cytosol until the third week of cultivation were observed.