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Influence of culture conditions on mycelial structure and polygalacturonase synthesis of Aspergillus niger
Author(s) -
Hermersdörfer H.,
Leuchtenberger A.,
Wardsack Ch.,
Ruttloff H.
Publication year - 1987
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.3620270604
Subject(s) - mycelium , pectinase , spore , liquid culture , pellet , food science , chemistry , biosynthesis , biology , enzyme , botany , biochemistry , ecology
Biosynthesis of polygalacturonase (PG) by A. niger strain R 1/214 correlates with the morphology of mycelium in submerged culture. The mean specific PG‐synthesis (PG‐U · g −1 · h −1 ) increases with the degree of compactness of mycelium. PG‐production can be optimized by a precise adjustment of the culture conditions after direct spore inoculation (diffuse mycelium) but the high synthesis as by compact mycelium is never obtained. Different reasons for the higher enzyme production by the pellet mycelium are discussed. PG‐synthesis is assumed to be strictly connected with a limitation of nutrient and oxygen supply.