Production and Partial Characterization of Cellulases from Trichoderma sp. IS-05 Isolated from Sandy Coastal Plains of Northeast Brazil

Table 3

Effect of different ions on cellulase activity. Enzyme was produced by Trichoderma sp. IS-05 grown on 4.4% (w/v) WB and 0.25% (w/v) peptone.

Ion^a	Relative activity (%)^b
Control (no addition)	100.0
EDTA	42.4
Mg^2+	36.6
Zn^2+	48.4
Co^+	14.1
K^+	63.7
Cu^2+	11.7
Na^+	46.6
Ba^2+	33.9
Mn^2+	18.4
Ca^2+	44.0
Hg^+	31.4
Fe^2+	30.7

^aThe final concentration in the reaction mixture was 10 mM.
^bRelative activity is expressed as a percentage of control (100% of enzyme activity = 1224.0 U L⁻¹).