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Biological pretreatment with white rot fungi has shown potential for improving enzymatic hydrolysis of wood and grass. In this study, 34 isolates of white rot fungi were screened for the biological pretreatment of bamboo culms (Phyllostachys pubescence). Echinodontium taxodii 2538 and Trametes versicolor G20 were selected for further evaluation of pretreatment because they caused high lignin loss (>20%) and high selectivity value of lignin degradation (>2) after the 4-week biodegradation. Fermentable sugar yield of bamboo culms pretreated with these two fungi through enzymatic hydrolysis increased with increasing pretreatment time. Sugar yield of bamboo culms pretreated with T. versicolor G20 and E. taxodii 2538 increased 5.15-fold and 8.76-fold, respectively, after 120-day pretreatment. FTIR analysis showed that E. taxodii 2538 preferentially degraded the lignin of bamboo culms. The pretreated bamboo …