scholarly journals Anatomical, Chemical and Mechanical Characteristics of Beech Wood Degraded by Two Pleurotus Species

2020 ◽  
Vol 71 (1) ◽  
pp. 47-53
Author(s):  
Yaghoob Azimi ◽  
Mohsen Bahmani ◽  
Hamid Reza Riyahi Bakhtyari ◽  
Ali Jafari
Keyword(s):  
Mass Loss ◽  
Bending Strength ◽  
Beech Wood ◽  
White Rot Fungi ◽  
White Rot ◽  
Fungal Colonization ◽  
Classical Literature ◽  
Wood Protection ◽  
Pleurotus Species ◽  
Microscopy Analysis

The aim of this study was to determine the destructive capabilities of the two white rot fungi Pleurotus cornucopiae (Pc) and P. eryngii (Pe) compared with the standard fungus Trametes versicolor (Tv) on beech wood samples after 60 days of incubation. Understanding of the white rot decay is important as it is necessary for the development of effective solutions for wood protection. Measurements of mass loss, chemical, mechanical properties and light microscopical investigations were conducted prior to and after incubation. Mass loss of samples was found to be 9-22 % depending on fungi species. Impact bending strength is not as sensitive as presumed in classical literature. Light microscopy analysis revealed that decay patterns were similar for both fungi. Wood cell wall thinning, fungal colonization hyphae were also the same for both fungi. Results indicated considerable wood attack by both Pleurotus species, Pc being more destructive than Pe.

scholarly journals Characterizing Fungal Decay of Beech Wood: Potential for Biotechnological Applications

2021 ◽  
Vol 9 (2) ◽  
pp. 247
Author(s):  
Ehsan Bari ◽  
Katie Ohno ◽  
Nural Yilgor ◽  
Adya P. Singh ◽  
Jeffrey J. Morrell ◽  
...  
Keyword(s):  
Lignin Degradation ◽  
Beech Wood ◽  
White Rot Fungi ◽  
White Rot ◽  
Aromatic Rings ◽  
Northern Iran ◽  
Decay Fungi ◽  
Pleurotus Species ◽  
Decay Test ◽  
Cell Wall Chemistry

The biotechnological potential of nine decay fungi collected from stored beech logs at a pulp and paper factory yard in Northern Iran was investigated. Beech blocks exposed to the fungi in a laboratory decay test were used to study changes in cell wall chemistry using both wet chemistry and spectroscopic methods. Pleurotus ostreatus, P. pulmonarius, and Lentinus sajor-caju caused greater lignin breakdown compared to other white-rot fungi, which led to a 28% reduction in refining energy. Trametesversicolor caused the greatest glucan loss, while P. ostreatus and L. sajor-caju were associated with the lowest losses of this sugar. Fourier transform infrared spectroscopy (FTIR) analyses indicated that white-rot fungi caused greater lignin degradation in the cell walls via the oxidation aromatic rings, confirming the chemical analysis. The rate of cellulose and lignin degradation by the T.versicolor and Pleurotus species was high compared to the other decay fungi analyzed in this study. Based on the above information, we propose that, among the fungi tested, P. ostreatus (27.42% lignin loss and 1.58% cellulose loss) and L. sajor-caju (29.92% lignin loss and 5.95% cellulose loss) have the greatest potential for biopulping.

scholarly journals The Impact of Paraffin-Thermal Modification of Beech Wood on Its Biological, Physical and Mechanical Properties

Forests ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 1102 ◽  
Author(s):  
Ladislav Reinprecht ◽  
Miroslav Repák
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Beech Wood ◽  
Physical And Mechanical Properties ◽  
Brown Rot ◽  
European Beech ◽  
White Rot ◽  
White Rot Fungus ◽  
Poria Placenta ◽  
The Impact

The European beech (Fagus sylvatica L.) wood was thermally modified in the presence of paraffin at the temperatures of 190 or 210 °C for 1, 2, 3 or 4 h. A significant increase in its resistance to the brown-rot fungus Poria placenta (by 71.4%–98.4%) and the white-rot fungus Trametes versicolor (by 50.1%–99.5%) was observed as a result of all modification modes. However, an increase in the resistance of beech wood surfaces to the mold Aspergillus niger was achieved only under more severe modification regimes taking 4 h at 190 or 210 °C. Water resistance of paraffin-thermally modified beech wood improved—soaking reduced by 30.2%–35.8% and volume swelling by 26.8%–62.9% after 336 h of exposure in water. On the contrary, its mechanical properties worsened—impact bending strength decreased by 17.8%–48.3% and Brinell hardness by 2.4%–63.9%.

Lignin Alteration byGanoderma australeand other White-Rot Fungi after Solid-State Fermentation of Beech Wood

Holzforschung ◽  
1993 ◽  
Vol 47 (2) ◽  
pp. 91-96 ◽  
Author(s):  
R. Bechtold ◽  
A.E. González ◽  
G. Almendros ◽  
M.J. Martínez ◽  
A.T. Martínez
Keyword(s):  
Solid State ◽  
Solid State Fermentation ◽  
Beech Wood ◽  
White Rot Fungi ◽  
White Rot

Effects of selected white-rot fungi on the calorific value of beech wood (Fagus sylvatica L.)

2019 ◽  
Vol 127 ◽  
pp. 105290 ◽  
Author(s):  
Jacek Piętka ◽  
Arkadiusz Gendek ◽  
Jan Malaťák ◽  
Jan Velebil ◽  
Tadeusz Moskalik
Keyword(s):  
Fagus Sylvatica ◽  
Beech Wood ◽  
White Rot Fungi ◽  
Calorific Value ◽  
White Rot ◽  
Fagus Sylvatica L

scholarly journals Impact of white-rot fungi on numbers and community composition of bacteria colonizing beech wood from forest soil

2008 ◽  
Vol 63 (2) ◽  
pp. 181-191 ◽  
Author(s):  
Larissa B. Folman ◽  
Paulien J.A. Klein Gunnewiek ◽  
Lynne Boddy ◽  
Wietse De Boer
Keyword(s):  
Forest Soil ◽  
Community Composition ◽  
Beech Wood ◽  
White Rot Fungi ◽  
White Rot

Comparison between degradation capabilities of the white rot fungi Pleurotus ostreatus and Trametes versicolor in beech wood

2015 ◽  
Vol 104 ◽  
pp. 231-237 ◽  
Author(s):  
Ehsan Bari ◽  
Nouredin Nazarnezhad ◽  
Seyed Mahmoud Kazemi ◽  
Mohammad Ali Tajick Ghanbary ◽  
Behbood Mohebby ◽  
...  
Keyword(s):  
Pleurotus Ostreatus ◽  
Trametes Versicolor ◽  
Beech Wood ◽  
White Rot Fungi ◽  
White Rot

Mechanical properties and chemical composition of beech wood exposed for 30 and 120 days to white-rot fungi

Holzforschung ◽  
2015 ◽  
Vol 69 (5) ◽  
pp. 587-593 ◽  
Author(s):  
Ehsan Bari ◽  
Hamid Reza Taghiyari ◽  
Behbood Mohebby ◽  
Carol A. Clausen ◽  
Olaf Schmidt ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Beech Wood ◽  
White Rot Fungi ◽  
White Rot ◽  
Chemical Components ◽  
Fungal Decay ◽  
Oriental Beech ◽  
Impact Bending ◽  
Decay Tests

Abstract The effects of exposing specimens of Oriental beech [Fagus sylvatica subsp. orientalis (Lipsky) Greuter and Burdet] to the white-rot fungi Pleurotus ostreatus (Jacq.: Fr.) Kummer and Trametes versicolor (L.: Fr.) Pilát strain 325 have been studied concerning the mechanical properties and chemical composition in terms of carbohydrates, cellulose, and lignin. Biological decay tests were carried out in accordance with the EN 113 standard specifications for 30 and 120 days. P. ostreatus had nearly the same deteriorating effects on the mechanical properties and chemical composition as that caused by T. versicolor. High and significant correlations were found between some mechanical properties with chemical components; for instance, the correlation coefficient (R2) between impact bending and carbohydrate content was about 0.96. The changes of components influence the various mechanical properties to a different degree. Incipient fungal decay caused severe changes for impact bending and carbohydrate loss. Several other properties declined at 120-day exposure time, such as the hardness, compression strength parallel to grain, and cellulose and lignin losses.

scholarly journals Monitoring the cell wall characteristics of degraded beech wood by white-rot fungi: Anatomical, chemical, and photochemical study

2018 ◽  
pp. 0-0 ◽  
Author(s):  
Ehsan Bari ◽  
Behbood Mohebby ◽  
Hamid Reza Naji ◽  
Reza Oladi ◽  
Nural Yilgor ◽  
...  
Keyword(s):  
Cell Wall ◽  
Beech Wood ◽  
White Rot Fungi ◽  
White Rot

Comparison of quantitative real-time PCR, chitin and ergosterol assays for monitoring colonization of Trametes versicolor in birch wood

Holzforschung ◽  
2005 ◽  
Vol 59 (5) ◽  
pp. 568-573 ◽  
Author(s):  
Morten Eikenes ◽  
Ari M. Hietala ◽  
Gry Alfredsen ◽  
Carl Gunnar Fossdal ◽  
Halvor Solheim
Keyword(s):  
Mass Loss ◽  
Real Time ◽  
Real Time Pcr ◽  
Trametes Versicolor ◽  
White Rot ◽  
Relative Mass ◽  
Fungal Colonization ◽  
Birch Wood ◽  
Quantitative Real Time Pcr ◽  
The Impact

AbstractThis paper describes the use of quantitative real-time PCR for monitoring colonization of birch wood (Betula pubescens) by the white-rot fungusTrametes versicolorin an EN113 decay experiment. The wood samples were harvested after 4, 8, 12, 16 and 20 weeks of incubation. The mass loss was in the range of 4–40%. Chitin and ergosterol assays were conducted for comparison. Second-order polynomial fits of the mass loss of decayed wood versus chitin, ergosterol and DNA gave correlations (r2) of 0.87, 0.61 and 0.84, respectively. Compared to the other two assays employed, real-time PCR data correlated best with the relative mass loss of decayed samples 4–8 weeks after inoculation, while the saturation and decline of DNA-based estimates for fungal colonization 16–20 weeks after inoculation indicated that the DNA assay is not suited for quantification purposes in the late stages of decay. The impact of conversion factors, extraction efficiency, inhibitory compounds and background levels in relation to the three detection assays used is discussed.

scholarly journals Effect of Substrates on Nutritional Composition and Functional Properties of Pleurotus Ostreatus

2018 ◽  
Vol 5 (1) ◽  
pp. 15-22
Author(s):  
Mbassi Josiane E. G ◽  
Mobou Estelle Y ◽  
Ngome Francis A ◽  
Sado Kamdem S. L
Keyword(s):  
Pleurotus Ostreatus ◽  
White Rot Fungi ◽  
Nutritional Composition ◽  
White Rot ◽  
University Libraries ◽  
Edible Fungi ◽  
Nutritional Properties ◽  
Pleurotus Species ◽  
Published Research

Pleurotus species, commonly known as oyster mushrooms, are edible fungi cultivated worldwide. Pleurotus genus is one of most extensively studied white-rot fungi due to its exceptional ligninolytic properties. These mushrooms have the ability to colonize and degrade a wide variety of lingo-cellulosic wastes with relatively short cycle. The objective of this study was to review published research works on the effect of substrates on nutritional composition and functional property of Pleurotus ostreatus. A literature search was done on the internet and university libraries in this area. It was found that different substrates used in cultivating mushrooms do have effect on the functional, organoleptic and nutritional properties of mushrooms. This review presents a practical checklist of effect of substrates on quality of Pleurotus ostreatus that may help different users.

Sign in / Sign up

Export Citation Format

Share Document