Cellulase production by halophytic fungi. I. Screening experiments and salt relations

Sallam, L. A. R.; El-Refai, A. H.; El-Sayed, Samia M.

doi:10.1016/s0232-4393(88)80085-4

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…High CM-cellulase and β-glucosidase activities were reported with T. viridae, T harzianum and Gliocladium virens in basal medium incubated at 30 °C (Gomes et al 1989). Maximum CM-cellulase and filter paper activity were observed with Ulocladium chartarum in basal medium incubated at 30 °C among a range of temperature from 5 to 45 °C used in the study (Sallam et al 1988). Similarly, optimum temperature was found to be 30 °C for cellulase production by Penicillium sp.…”

Section: Resultsmentioning

confidence: 92%

Optimization of cellulase production by Penicillium sp.

2016

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The production of cellulolytic enzymes (β-exoglucanase, β-endoglucanase and β-glucosidase) by Penicillium sp. on three different media in liquid shake culture conditions was compared. The organism exhibited relatively highest activity of endoglucanase among three enzymes measured at 7-day interval during the course of its growth on Czapek-Dox medium supplemented with 0.5 % (w/v) cellulose. Cellulose at 0.5 %, lactose at 0.5 %, sawdust at 0.5 %, yeast extract at 0.2 % as a nitrogen source, pH 5.0 and 30 °C temperature were found to be optimal for growth and cellulase production by Penicillium sp. Yields of Fpase, CMCase and β-glucosidase, attained on optimized medium with Penicillium sp. were 8.7, 25 and 9.52 U/ml, respectively with increment of 9.2, 5.9 and 43.8-folds over titers of the respective enzyme on unoptimised medium. Cellulase of the fungal culture with the ratio of β-glucosidase to Fpase greater than one will hold potential for biotechnological applications.

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Section: Resultsmentioning

confidence: 92%

Optimization of cellulase production by Penicillium sp.

2016

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“…There is little information about the physiology of the genus Ulocladium. Sallam et al [38] reported about a high cellulase activity of Ulocladium chartarum. Pedersen et al [36] ascertained that 50 different Ulocladium strains grown on wheat bran agar produced cellulose degrading enzymes, but their activity varied between species, as well as, between individual strains in each species.…”

Section: Production Of Cellulolytic Enzymesmentioning

confidence: 99%

Biodegradation of Wood Treated with Copper Based Preservative by Two Dematiaceous Fungi: Alternaria Tenuissima and Ulocladium Consortiale

Raudonienė

Bridžiuvienė²,

Malachovskienė³

et al. 2019

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As cases of treated wood colonization by fungi still happen, the understanding of fungal survival abilities could contribute in the creation of new efficient preservatives. For that reason, two dematiaceous fungi Alternaria tenuissima and Ulocladium consortiale isolated from treated wooden joists with discolorations were tested for their wood decomposition ability and tolerance to a copper based preservative. Our results indicated that the copper based preservative failed to suppress completely cellulose and lignin biodegradation by discoloring fungi studied in wood. Moreover, cellulose degradation was higher in the treated sawdust for both fungi after 30 days than in the untreated. Comparing the results of two strains U. consortiale that is little studied as a wood decomposer, was stronger lignin degrader than A. tenuissima in treated and untreated sawdust. The copper sulphate tolerance test showed that both fungi were able to grow up to 7 mM concentration in a solid medium. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.20563

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