Fig. 3

Cellulase and xylanase production in P. oxalicum deletion mutant ∆PoxMBF1, parental strain ∆PoxKu70, and complementary strain CPoxMBF1 cultivated in solid medium containing WR (a–e) and liquid medium containing WR (f–j) or Avicel (k–o) after a shift from glucose. Enzymatic activity was determined at 2–4 days after transfer from glucose. *p ≤ 0.05 and **p ≤ 0.01 indicate significant differences between deletion mutants and parental strain ∆PoxKu70 or complementary strain CPoxMBF1 (Student’s t tests)