Polygalacturonase activity of Penicillum sp 7/4B/EI 1 mutant grown on some by-products of food industry
Szajer, I.
Acta Microbiologica Polonica. Series A Microbiologia Generalis 8(1): 51-56
1976
ISSN/ISBN: 0567-7815 PMID: 937088 Document Number: 102522
Pectolytic activity of the Penicillium sp. 7/4B/EI1 mutant, which effectively synthesized PG , was studied on some by-products of food industries (apple pulp, beet pulp and their mixtures with wheat bran) supplemented in some experiments with mineral salts of Czapek's medium. The strain showed good growth but a low PG activity when grown on by-products without mineral salts and an increase in PG activity after cultivation on these by-products (mainly on beet pulp) enriched with mineral salts. The highest PG activity was obtained after 6-8 days cultivation on beet pulp (3%) with mineral salts. Among the tested salts, NaNO3 influenced PG activity most effectively, K2HPO4 and MgSO4 to a smaller degree but others were ineffective. The mutant did not synthesize PE under these culture conditions.