Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

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    We will mail you new results for this query: keywords==white-rot fungi
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Screening of white-rot fungi for bioprocessing of wheat straw into ruminant feed
Nayan, N. ; Sonnenberg, A.S.M. ; Hendriks, W.H. ; Cone, J.W. - \ 2018
Journal of Applied Microbiology 125 (2018)2. - ISSN 1364-5072 - p. 468 - 479.
degradability - different strains/species - in vitro gas production - ruminant - screening - wheat straw - white-rot fungi

Aim: In this study, the biological variation for improvement of the nutritive value of wheat straw by 12 Ceriporiopsis subvermispora, 10 Pleurotus eryngii and 10 Lentinula edodes strains was assessed. Screening of the best performing strains within each species was made based on the in vitro degradability of fungal-treated wheat straw. Methods and Results: Wheat straw was inoculated with each strain for 7 weeks of solid state fermentation. Weekly samples were evaluated for in vitro gas production (IVGP) in buffered rumen fluid for 72 h. Out of the 32 fungal strains studied, 17 strains showed a significantly higher (P < 0·05) IVGP compared to the control after 7 weeks (227·7 ml g−1 OM). The three best Ceriporiopsis subvermispora strains showed a mean IVGP of 297·0 ml g−1 OM, while the three best P. eryngii and L. edodes strains showed a mean IVGP of 257·8 and 291·5 ml g−1 OM, respectively. Conclusion: Ceriporiopsis subvermispora strains show an overall high potential to improve the ruminal degradability of wheat straw, followed by L. edodes and P. eryngii strains. Significance and Impact of the Study: Large variation exists within and among different fungal species in the valorization of wheat straw, which offers opportunities to improve the fungal genotype by breeding.

Fungal treated lignocellulosic biomass as ruminant feed ingredient: A review
Kuijk, S.J.A. van; Sonnenberg, A.S.M. ; Baars, J.J.P. ; Hendriks, W.H. ; Cone, J.W. - \ 2015
Biotechnology Advances 33 (2015)1. - ISSN 0734-9750 - p. 191 - 202.
white-rot fungi - solid-state fermentation - in-vitro digestibility - chromatography mass-spectrometry - spent wheat straw - oil palm fronds - pleurotus-ostreatus - ceriporiopsis-subvermispora - chemical-composition - trametes-versicolor
In ruminant nutrition, there is an increasing interest for ingredients that do not compete with human nutrition. Ruminants are specialists in digesting carbohydrates in plant cell walls; therefore lignocellulosic biomass has potential in ruminant nutrition. The presence of lignin in biomass, however, limits the effective utilization of cellulose and hemicellulose. Currently, most often chemical and/or physical treatments are used to degrade lignin. White rot fungi are selective lignin degraders and can be a potential alternative to current methods which involve potentially toxic chemicals and expensive equipment. This review provides an overview of research conducted to date on fungal pretreatment of lignocellulosic biomass for ruminant feeds. White rot fungi colonize lignocellulosic biomass, and during colonization produce enzymes, radicals and other small compounds to breakdown lignin. The mechanisms on how these fungi degrade lignin are not fully understood, but fungal strain, the origin of lignocellulose and culture conditions have a major effect on the process. Ceriporiopsis subvermispora and Pleurotus eryngii are the most effective fungi to improve the nutritional value of biomass for ruminant nutrition. However, conclusions on the effectiveness of fungal delignification are difficult to draw due to a lack of standardized culture conditions and information on fungal strains used. Methods of analysis between studies are not uniform for both chemical analysis and in vitro degradation measurements. In vivo studies are limited in number and mostly describing digestibility after mushroom production, when the fungus has degraded cellulose to derive energy for fruit body development. Optimization of fungal pretreatment is required to shorten the process of delignification and make it more selective for lignin. In this respect, future research should focus on optimization of culture conditions and gene expression to obtain a better understanding of the mechanisms involved and allow the development of superior fungal strains to degrade lignin in biomass.
A thready affair: linking fungal diversity and community dynamics to terrestrial decomposition processes
Wal, A. van der; Geydan Rivera, T.D.K.H. ; Kuyper, T.W. ; Boer, W. de - \ 2013
FEMS Microbiology Reviews 37 (2013)4. - ISSN 0168-6445 - p. 477 - 494.
soil organic-matter - leaf-litter decomposition - wood-decaying fungi - home-field advantage - white-rot fungi - microbial community - temperature sensitivity - functional diversity - nitrogen deposition - active fungi
Filamentous fungi are critical to the decomposition of terrestrial organic matter and, consequently, in the global carbon cycle. In particular, their contribution to degradation of recalcitrant lignocellulose complexes has been widely studied. In this review, we focus on the functioning of terrestrial fungal decomposers and examine the factors that affect their activities and community dynamics. In relation to this, impacts of global warming and increased N deposition are discussed. We also address the contribution of fungal decomposer studies to the development of general community ecological concepts such as diversity-functioning relationships, succession, priority effects and home-field advantage. Finally, we indicate several research directions that will lead to a more complete understanding of the ecological roles of terrestrial decomposer fungi such as their importance in turnover of rhizodeposits, the consequences of interactions with other organisms and niche differentiation.
Effect of fungal treatments of fibrous agricultural by-products on chemical composition and in vitro rumen fermentation and methane production
Tuyen, D.V. ; Phuong, H.N. ; Cone, J.W. ; Baars, J.J.P. ; Sonnenberg, A.S.M. ; Hendriks, W.H. - \ 2013
Bioresource Technology 129 (2013). - ISSN 0960-8524 - p. 256 - 263.
white-rot fungi - wheat-straw - rice straw - invitro digestibility - pleurotus-ostreatus - digestion kinetics - sugarcane bagasse - detergent fiber - animal feed - lignin
Maize stover, rice straw, oil palm fronds and sugarcane bagasse were treated with the white-rot fungi Ceriporiopsis subvermispora, Lentinula edodes, Pleurotus eryngii, or Pleurotus ostreatus at 24 °C for 0–6 weeks. The fungi increased total gas production from oil palm fronds by 68–132%, but none of the fungi improved the in vitro rumen fermentability of maize stover. C. subvermispora and L. edodes increased total gas production of sugarcane bagasse by 65–71%, but P. eryngii and P. ostreatus decreased it by 22–50%. There was a linear relationship (P <0.05) between the proportion of lignin in the original substrate and the increase in in vitro gas production observed for C. subvermispora and L. edodes treatments (R2 = 0.92 and 0.96, respectively). It is concluded that C. subvermispora and L. edodes have a particularly high potential to improve the nutritive value of highly lignified ruminant feeds.
Fungal strain and incubation period affect chemical composition and nutrient availability of wheat straw for rumen fermentation
Tuyen, Van Dinh ; Cone, J.W. ; Baars, J.J.P. ; Sonnenberg, A.S.M. ; Hendriks, W.H. - \ 2012
Bioresource Technology 111 (2012). - ISSN 0960-8524 - p. 336 - 342.
white-rot fungi - solid-state fermentation - in-vitro digestibility - pleurotus-ostreatus - ceriporiopsis-subvermispora - trametes-versicolor - sugarcane bagasse - detergent fiber - crop residues - animal feed
Eleven white-rot fungi were examined for their potency to degrade lignin and to improve the rumen fermentability of wheat straw. The straw was inoculated with the fungi and incubated under solid state conditions at 24 °C for 0–49 days to determine changes in in vitro gas production and chemical composition. Results show that some fungi could degrade lignin by as much as 63%, yet the delignification was highly correlated with the degradation of hemicellulose (r = 0.96). Reduction in lignin was poorly (r = 0.47), but the ratio between lignin and cellulose loss was strongly (r = 0.87) correlated with the increase in gas production. Treatment with Ceriporiopsis subvermispora for 49 days increased total gas production of the straw from 200 to 309 ml/g organic matter (OM). It was concluded that some fungi highly selective for lignin and not for cellulose are able to improve the nutritive value of wheat straw as a ruminant feed
Utilization of rice straw and different treatments to improve its feed value for ruminants: A review
Sarnklong, C. ; Cone, J.W. ; Pellikaan, W.F. ; Hendriks, W.H. - \ 2010
Asian-Australasian Journal of Animal Sciences 23 (2010)5. - ISSN 1011-2367 - p. 680 - 692.
white-rot fungi - vitro fermentation characteristics - alkaline hydrogen-peroxide - 3 cultivation seasons - wheat-straw - chemical-composition - in-vitro - rumen fermentation - fibrolytic enzymes - sodium-hydroxide
This paper gives an overview of the availability, nutritive quality, and possible strategies to improve the utilization of rice straw as a feed ingredient for ruminants. Approximately 80% of the rice in the world is grown by small-scale farmers in developing countries, including South East Asia. The large amount of rice straw as a by-product of the rice production is mainly used as a source of feed for ruminant livestock. Rice straw is rich in polysaccharides and has a high lignin and silica content, limiting voluntary intake and reducing degradability by ruminal microorganisms. Several methods to improve the utilization of rice straw by ruminants have been investigated in the past. However, some physical treatments are not practical because of the requirement for machinery or treatments are not economical feasible for the farmers. Chemical treatments, such as NaOH, NH3 or urea, currently seem to be more practical for on-farm use. Alternative treatments to improve the nutritive value of rice straw are the use of ligninolytic fungi (white-rot fungi), with their extracellular ligninolytic enzymes, or specific enzymes degrading cellulose and/or hemicellulose. The use of fungi or enzyme treatments is expected to be a more practical and environmental-friendly approach for enhancing the nutritive value of rice straw and can be cost-effective in the future. Using fungi and enzymes might be combined with the more classical chemical or physical treatments. However, available data on using fungi and enzymes for improving the quality of rice straw are relatively scarce.
Fungal bio-treatment of spruce wood with Trametes versicolor for pitch control: Influence on extractive contents, pulping process parameters, paper quality and effluent toxicity
Beek, T.A. van; Kuster, B. ; Claassen, F.W. ; Tienvieri, T. ; Bertaud, F. ; Lennon, G. ; Petit-Concil, M. ; Sierra-Alvarez, R. - \ 2007
Bioresource Technology 98 (2007)2. - ISSN 0960-8524 - p. 302 - 311.
white-rot fungi - mills - detoxification - chromatography - degradation
Lipophilic low molar-mass constituents in wood chips for the paper industry result in low quality pulp, pitch deposition, and effluent toxicity. New biotechnological solutions such as fungal pre-treatment of wood chips can reduce pitch problems. This laboratory-scale study focuses on the potential and limitations of a fungal bio-treatment of Norway spruce chips with the white-rot fungus Trametes versicolor. Different fungal treatment conditions were compared. A 4-week fungal treatment reduced the concentration of resin acids and triglycerides by 40% and 100%, respectively, but neither lowered the energy requirements of the TMP process nor significantly affected the morphological fiber characteristics and the physical pulp properties. The pre-treatment led to slightly poorer optical properties. The Trametes versicolor fungal treatment contributed to a less toxic effluent and improved the biodegradability. A treatment of 2-3 weeks appears optimal
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