Abstract:
Ten filamentous fungi isolated from a growaste samples .Three isolated were
of high productivity for pectinase enzyme compared with other isolates ,
depending on diameter of clear hydrolyzed zones on the medium plates containing
commercial pectin as sole carbon source , this isolates were Aspergillusniger
(A 2 ),closely followed byAspergillus sp.(A 1 ) and penicillum sp.(P 1 ) . The three
isolates also produced pectinases with different a growastes ( Orange peels , Apple
peels , Banana peels)as the sole carbon source ,Aspergillusniger(A 2 ) was the best
isolate for pectinase production on the medium containing orange peels as the sole
carbon source . Peak pectinase activity of 675 and 370 u/mg protein was
respectively obtained by solid – state fermentation (ssf) and submerged
fermentation (smf) for A.niger(A 2 ) .Solid – state fermentation yielded higher levels
of pectinase activity than the submerged fermentation . The strain of A.niger(A 2 )
have good prospect for pectinase production ,and the orange peels is a good low –
cost fermentation substrate for pectinase production by the investigated isolate