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- W2014291285 abstract "The spore suspensions of Penicillium expansum were irradiated with 50 and 100 krad of gamma radiation. Rates of growth (mycelial dry weight), pectinesterase, polygalacturonase and tissue macerating enzymes were measured 1–7 days after inoculation in Czapek-Dox broth. Mycelial dry weight in irradiated cultures was lower than those in the controls. The activities of polygalacturonase and tissue macerating enzymes were higher than those in the controls after 3 days of post-irradiation incubation. Evidence indicates that the enzyme synthesis rather than the “enzyme release” causes an increase in the activities of pectolytic enzymes. Des suspensions de spores de Penicillium expansum ont été irradiés par 50 et 100 krad de rayons gamma. Les vitesses de croissance (poids sec du mycelium) ainsi que les teneurs en pectinéstérase, polygalacturonase ainsi que les enzymes de macération des tissus ont été mesurés 1 à 7 jours après inoculation du milieu Czapek-Dox. Le poids sec du mycelium des cultures irradiées est moins élevé que celui des témoins. Les activités de la polygalacturonase et des enzymes de maceration sont supérieures à celles des témoins après 3 jours d'incubations consécutifs à l'irradiation. Les expériences indiquent de manière évidente que c'est la synthèse des enzyles plutôt que leur “libération” qui produit un accroissement des activités pectolytiques. Die Sporensuspensionen von Penicillium expansum wurden mit 50 und 100 krad Gammastrahlen behandelt. Wachstumsraten (Trockengewicht des Myzels), Pektinesterase, Polygalakturonase und Mazerationsenzyme des Gewebes wurden 1 bis 7 Tage nach Beimpfung auf Czapek-Dox-Medium bestimmt. Bei bestrahlten Kulturen war das Trockengewicht des Myzels niedriger als bei den Kontrollen. Nach 3 Tagen Inkubation nach Bestrahlung war die Aktivität der Polygalakturonase und der Mazerationsenzyme des Gewebes höher als bei den Kontrollen. Die Ergebnisse lassen offenbar den Schluss zu, dass eher Enzymsynthese als Enzymabgabe eine gesteigerte Wirkung der pektolytischen Enzyme verursacht." @default.
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- W2014291285 date "1970-01-01" @default.
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- W2014291285 title "Effects of gamma radiation on Penicillium expansum L. II. Some enzymatic changes in the fungus" @default.
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- W2014291285 doi "https://doi.org/10.1016/s0033-7560(70)80061-8" @default.
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