Biophysiological profiling of Ganoderma resinaceum Boud., a newly recorded Philippine mushroom

Ganoderma resinaceum, a member of the family Ganodermataceae, is a saprophytic fungus that grows parasitically on living trees. It is considered an ethnomedicine as it contains different important bioactive compounds and exhibits various bioactivities. This study focused on establishing the optimal culture conditions for the mycelial growth of G. resinaceum. Luxuriant secondary mycelial growth of G. resinaceum was obtained using MEA and PDA as culture media. Meanwhile, a slightly alkaline medium with a pH of 8 favors the optimal growth of G. resinaceum, while no significant differences were observed for both aeration and illumination; G. resinaceum exhibited its best growth under both conditions. Moreover, a slightly lower temperature of 23 °C promotes the optimal growth of the secondary mycelia of this mushroom. On the other hand, by utilizing the 7:3 v/v rice straw-sawdust substrate formulation, G. resinaceum successfully produced fruiting bodies, yielding 11.40 g per bag equivalent to 2.40% biological efficiency. Overall, this study determined the optimum cultivation conditions and fructification of G. resinaceum, indicating the successful domestication of this wild mushroom. In addition, the successful production of fruiting bodies in G. resinaceum has paved the way for mass industrial cultivation. Subsequent studies that focus on optimizing substrate formulations to enhance the yields and efficiency of fruiting body production for G. resinaceum are recommended.