Production of cellulases and xylanase by Trichoderma reesei F‐522 on pretreated wheat straw

Szczodrak, Janusz

doi:10.1002/abio.370080607

Cited by 16 publications

(8 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A number of reports are available for pre-treatment of lignocellulosics to remove lignin for enhancing xylanase production mainly on wheat straw (23). But as the maize & jowar straw showed more potential to produce xylanase so the alkali pretreatment and subsequent fermentation was attempted with these two straws.…”

Section: Effect Of Pretreatment Of Lignocellulosicsmentioning

confidence: 99%

Xylanase production with xylan rich lignocellulosic wastes by a local soil isolate of Trichoderma viride

Goyal¹,

Kalra²,

Sareen³

et al. 2008

Braz. J. Microbiol.

View full text Add to dashboard Cite

In the present study, cultural and nutritional conditions for enhanced production of xylanase by a local soil isolate of Trichoderma viride, using various lignocellulosic substrates in submerged culture fermentation have been optimized. Of the lignocellulosics used, maize straw was the best inducer followed by jowar straw for xylanase production. The highest activity achieved was between 14 to 17 days of fermentation. A continuous increase in xylanase production was observed with increasing level of lignocellulosics in the medium and highest activity was observed with maize straw at 5% level. Xylanase production with higher levels of lignocellulosics (3 to 5%) of maize, jowar and barseem was found to be higher as compared to that with commercial xylan as carbon source. Sodium nitrate was the best nitrogen source among the six sources used. Maximum xylanase production was achieved with initial medium pH of 3.5-4.0 and incubation temperature of 25ºC.The enzyme preparation was effective in bringing about saccharification of different lignocellulosics. The xylanase production could be further improved by using alkali treated straw as carbon source.

show abstract

Section: Effect Of Pretreatment Of Lignocellulosicsmentioning

confidence: 99%

Xylanase production with xylan rich lignocellulosic wastes by a local soil isolate of Trichoderma viride

Goyal¹,

Kalra²,

Sareen³

et al. 2008

Braz. J. Microbiol.

View full text Add to dashboard Cite

show abstract

“…Protein concentration decreased with increasing the substrate concentration. This is possibly due to a partial adsorption of enzymes to the substrate (Fahnrich and Irrgang, 1981; Szczodrak, 1988). Surprisingly, the activity of β ‐glucosidase increased with increasing the substrate concentration.…”

Section: Resultsmentioning

confidence: 99%

“…Pure and crystalline cellulosic substrates, such as SolkaFloc, Avicel, and cotton, are good inducers of cellulase (Reczey et al, 1996), while purified xylans are excellent substrates for xylanase production (Haltrich et al, 1996). However, these substrates are costly (Szczodrak, 1988). Lignocellulose wastes are low‐cost carbon sources, for example, crop residues, wood, and wood residues (Chahal et al, 1982; Shin et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Enzyme production by the mixed fungal culture with nano‐shear pretreated biomass and lignocellulose hydrolysis

Weerasiri

Liu

et al. 2013

Biotech & Bioengineering

View full text Add to dashboard Cite

Cellulase, xylanase, and β-glucosidase production was studied on novel nano-shear pretreated corn stover by the mixed fungi culture. The high shear force from a modified Tayor-Couette nano-shear mixing reactor efficiently disintegrated corn stover, resulting in a homogeneous watery mash with particles in much reduced size. Scanning electron microscope study showed visible mini-pores on the fiber cell wall surface, which could improve the accessibility of the pretreated corn stover to microorganisms. Mixed fungal culture of Trichoderma reesei RUT-C30 and Aspergillus niger produced enzymes with higher cellulolytic and xylanolytic activities on corn stover pretreated with nano-shear mixing reactor, in comparison with other pretreatment methods, including acid and ammonia fiber explosion (AFEX) pretreatment. The hydrolytic potential of the whole fermentation broth from the mixed fungi was studied, and the possibility of applying the whole cell saccharification concept was also investigated to further reduce the cost of lignocellulose hydrolysis.

show abstract

“…At present, direct production of citric acid from cellulose has not yet succeeded, because A. niger usually cannot degrade nor assimilate crystalline cellulose as a sole carbon source. Trichoderma species in particular, are well known as efficient producers of plant cell walldegrading systems, cellulolytic and xylannolytic activities [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Polyploid Formation Between Aspergillus niger and Trichoderma viride For Enhanced Citric Acid Production From Cellulose

Watanapokasin

Sawasjirakij

Usami

et al. 2007

Appl Biochem Biotechnol

View full text Add to dashboard Cite

The first-stage heterokaryons, obtaining from intergeneric protoplast fusion between Aspergillus niger (Y-b) and Trichoderma viride (M5S51), showed slow growth and mixed morphologies on minimal medium. The fusants were classified into heterokaryon and prototrophic haploid, showing the morphology as that of A. niger. The heterokaryon strains formed conidia with the same nutritional requirements as those of the original auxotrophic mutant strains. After several subcultivations on minimal medium containing d-camphor, some heterokaryon strains formed larger two to seven nuclei/conidium as compared to one nucleus/conidium of the auxotrophic mutant and prototrophic strains, indicating that the new hybrids were generated. Interestingly, three fusant strains AT 11-2-3, AT 11-2-10, and AT 11-2-14 produce 19.2, 6.1, and 10.5 g/l citric acid, respectively, in semisolid culture containing cellulose, whereas A. niger Yang no. 2 could not use carboxymethyl cellulose as the sole carbon source for citric acid production. In addition, the average maximum beta-glucosidase and carboxymethylcellulase productions from AT 11-2-3, AT 11-2-10, and AT 11-2-14 were about 16- and 4-folds higher than those of A. niger, respectively.

show abstract

Production of cellulases and xylanase by Trichoderma reesei F‐522 on pretreated wheat straw

Cited by 16 publications

References 19 publications

Xylanase production with xylan rich lignocellulosic wastes by a local soil isolate of Trichoderma viride

Xylanase production with xylan rich lignocellulosic wastes by a local soil isolate of Trichoderma viride

Enzyme production by the mixed fungal culture with nano‐shear pretreated biomass and lignocellulose hydrolysis

Polyploid Formation Between Aspergillus niger and Trichoderma viride For Enhanced Citric Acid Production From Cellulose

Contact Info

Product

Resources

About