Molecular Biology of Cellulolytic Fungi

Nevalainen, Helena; Penttilä, Merja

doi:10.1007/978-3-662-07426-8_18

Cited by 18 publications

(10 citation statements)

References 165 publications

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“…However, according to Boon et al [33] and Pastorova et al [34], cellulosic oligosaccharides, anhydrooligosaccharides and glucose were present after heating in 250 C, 270 C and 310 C, respectively, and could still be available for some fungi. Cellulose also consists of carbohydrates, but utilizing it requires extracellular enzymes such as cellulases which some Trichoderma species (T. reesei) are known to secrete [35]. It is also possible that some species of Trichoderma can degrade lignin [36].…”

Section: Fungal Growthmentioning

confidence: 99%

Biological degradation of torrefied wood and charcoal

Kymäläinen

Havimo

Keriö

et al. 2014

Biomass and Bioenergy

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Section: Fungal Growthmentioning

confidence: 99%

Biological degradation of torrefied wood and charcoal

Kymäläinen

Havimo

Keriö

et al. 2014

Biomass and Bioenergy

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“…Trichoderma reesei (teleomorph Hypocrea jecorina) is widely used in the enzyme industry for the production of cellulases (17)(18)(19), and it has also been used as a cell factory to express numerous recombinant proteins (20). While the T. reesei holomorph includes most of the teleomorphs found on dead wood, Trichoderma parareesei has recently been described as a new species, in which sexual reproduction does not occur, and T. parareesei encompasses all of the extremely efficient cellulase-producing strains formerly isolated as T. reesei from soil (21).…”

mentioning

confidence: 99%

Identifying Beneficial Qualities of Trichoderma parareesei for Plants

Rubio

Quijada

Pérez

et al. 2014

Appl Environ Microbiol

105

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Trichoderma parareesei and Trichoderma reesei (teleomorph Hypocrea jecorina) produce cellulases and xylanases of industrial interest. Here, the anamorphic strain T6 (formerly T. reesei) has been identified as T. parareesei, showing biocontrol potential against fungal and oomycete phytopathogens and enhanced hyphal growth in the presence of tomato exudates or plant cell wall polymers in in vitro assays. A Trichoderma microarray was used to examine the transcriptomic changes in T6 at 20 h of interaction with tomato plants. Out of a total 34,138 Trichoderma probe sets deposited on the microarray, 250 showed a significant change of at least 2-fold in expression in the presence of tomato plants, with most of them being downregulated. T. parareesei T6 exerted beneficial effects on tomato plants in terms of seedling lateral root development, and in adult plants it improved defense against Botrytis cinerea and growth promotion under salt stress. Time course expression patterns (0 to 6 days) observed for defense-related genes suggest that T6 was able to prime defense responses in the tomato plants against biotic and abiotic stresses. Such responses undulated, with a maximum upregulation of the jasmonic acid (JA)/ethylene (ET)-related LOX1 and EIN2 genes and the salt tolerance SOS1 gene at 24 h and that of the salicylic acid (SA)-related PR-1 gene at 48 h after T6 inoculation. Our study demonstrates that the T. parareesei T6-tomato interaction is beneficial to both partners.

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“…Such accumulation could inhibit, by feed back, the activity of endo-and exoglucanase. The capacity of degrading the natural cellulose involves the biosynthesis of the whole enzyme system (Nevalainen and Penttil, 1995;Lee and Fan, 1980). Soil enzymes were found to discriminate between land management practices and to evaluate waste disposal on lands, and therefore appear to be useful for monitoring changes in soil over time (Dick, R.P., 1997;Bandick and Dick, 1999;Badiane et al, 2001).…”

Section: α-Glucosidasementioning

confidence: 99%

The relative effects of some elements on the DNS method in cellulase assay

Sinegani

Emtiazi

2006

Journal of Applied Sciences and Environmental Management

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For evaluating the relative effects of some polluting salts on the measurement of cellulase activity assayed by 3,5-dinitrosalicylate (DNS) this study was done. Glucose were the most effective inhibitors of cellulase activity. These ions inhibited exoglucanase more than endoglucanase. The effect of most ions on cellulase activity may be related to negative or positive effect of them on the method of cellulase assessment. So, for a better data interpretation in the study of ion effects on the soil enzyme activity, both the effects of ions on the method of enzyme assay, and the effects of ions on the enzyme activity should be studied. @JASEM Cellulase is an enzyme system that degrades cellulose and releases reducing sugars as the end products. The system consists of endo-l,4-B-glucanase (EC3.2.1.4), exo-I,4-B-glucanase (EC 3.2.1.91) and B-Dglucosidase (EC 3.2.1.21). Endo-α -1,4-glucanase (1,4-α-D-glucan-4-glucan-hydrolase) has the role of randomly degrading α-1,4-glucosidic bonds from the middle of the cellulose molecule. It does not attack cellobiose but hydrolyzes cellodextrines and substituted celluloses, for instance carboxymethylcellulose. Its specificity is moderate, different sub-types having various affinities for different length oligosaccharides. Exo-β-1,4-glucanase (1,4-β -D-glucan cellobiohydrolase) cuts step by step cellobiose units from the non-reducing end of cellulosic chains. It hydrolyses the cellodextrines but not the cellobiose. Its substrate specificity is rather high enabling it to degrade more than 80% from the crystalline cellulose while its degree of activity is different for different microorganisms.

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Molecular Biology of Cellulolytic Fungi

Cited by 18 publications

References 165 publications

Biological degradation of torrefied wood and charcoal

Biological degradation of torrefied wood and charcoal

Identifying Beneficial Qualities of Trichoderma parareesei for Plants

The relative effects of some elements on the DNS method in cellulase assay

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