3.9. Effect of incubation temperature
Incubation temperature is also a critical factor in the growth of
fungus. Different experiments were performed on various
incubation temperatures ranging from 20 to 50 C. Results of
the study indicated that maximum enzyme production was
noted at 30 C yielding enzyme activity of 64.3 1.3 U/g as
shown in Fig. 9.When the fungus was grown at 35 C enzyme
yield of 60.1 1.6 U/g was obtained. As the incubation temperature
was further increased decrease in enzyme production
was also observed. Abdel-Satera and El-Said (2001)
screened xylan degrading filamentous fungi and reported that
T. harzianum produced maximum xylanase production at incubation
temperature of 35 C. Goyal et al. (2008) also reported
the incubation temperature of 25 C was best for xylanase
production by T. viride. Fusarium oxysporum in shake flask
cultures also produces maximum xylanase yield at incubation
temperature of 30 C (Kuhadd et al., 1998). These variations in
different incubation temperatures were due to the different
nature of microorganism and its environmental conditions.