Fig. 1

Brown film formation and fruit body development in the sawdust cultivation of the Lentinula edodes strain Chamaram. a Light-induced brown film formation on sawdust media. b Development of L. edodes fruiting bodies. c Fruiting body development and contamination by Trichoderma sp. on normal and dark yellow films formed by mycelial tissues. d Microstructures of white (W), normal brown (B), and partial brown (BP) film mycelium