On the changes of pinewood (Pinus sylvestris L.) Chemical composition and ultrastructure during the attack by brown-rot fungi Postia placenta and Coniophora puteana

Irbe, Ilze; Andersons, Bruno; Chirkova, Jelena; Kallavus, Urve; Andersone, Ingeborga; Faix, O.

doi:10.1016/j.ibiod.2005.12.002

Cited by 69 publications

(44 citation statements)

References 15 publications

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“…The first signs of brown rot decay are visible in the outer regions of the cell wall, that is, in the middle lamella, S1, and the outer parts of S2 (Irbe et al 2006;Fackler et al 2010 Goodell et al (1997), Arantes et al (2012), and Baldrian and Valaskova (2008). HQ, hydroquinone; MF, microfibrils; Q, quinone.…”

Section: Degradation Of Polysaccharidesmentioning

confidence: 99%

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Mode of action of brown rot decay resistance in modified wood: a review

Pilgård²,

et al. 2013

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Chemically or physically modified wood materials have enhanced resistance to wood decay fungi. In contrast to treatments with traditional wood preservatives, where the resistance is caused mainly by the toxicity of the chemicals added, little is known about the mode of action of nontoxic wood modification methods. This study reviews established theories related to resistance in acetylated, furfurylated, dimethylol dihydroxyethyleneurea-treated, and thermally modified wood. The main conclusion is that only one theory provides a consistent explanation for the initial inhibition of brown rot degradation in modified wood, that is, moisture exclusion via the reduction of cell wall voids. Other proposed mechanisms, such as enzyme nonrecognition, micropore blocking, and reducing the number of free hydroxyl groups, may reduce the degradation rate when cell wall water uptake is no longer impeded.

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Section: Degradation Of Polysaccharidesmentioning

confidence: 99%

“…Their higher accessibility is the reason why hemicelluloses are degraded before cellulose (Curling et al 2002;Irbe et al 2006;Fackler et al 2010). …”

Section: Degradation Of Polysaccharidesmentioning

confidence: 99%

Mode of action of brown rot decay resistance in modified wood: a review

Pilgård²,

et al. 2013

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“…Interpretation of IR spectra was based on various studies (Fackler andSchwanninger 2010, 2012;Irbe et al 2006Irbe et al , 2011Körner et al 1992;Pandey and Nagveni 2007;Shang et al 2013). Figure 1 presents a comparison of pine wood spectrum (a) with the spectrum of pine exposed to C. puteana (b).…”

Section: Resultsmentioning

confidence: 99%

Chemical characterization of wood treated with a formulation based on propolis, caffeine and organosilanes

et al. 2017

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The aim of the study was to present chemical characteristics of a potential wood protection system composed of three chemical components. The paper presents preliminary results of chemical and biological analysis of wood treated with a mixture of 30% ethanol extract of propolis, caffeine and organosilanes: methyltrimetoxysilane (MTMOS) and octyltriethoxysilane (OTEOS). The sapwood of Scots pine (Pinus sylvestris L.) was impregnated with the above mentioned solution by vacuum method. The samples of wood treated with preservative were subjected to accelerated aging procedure according to EN 84 and subsequently to mycological tests according to the modified EN 113. Structural analysis of the treated wood was performed using infrared spectroscopy FTIR. The concentration of silicon in wood samples was determined by atomic absorption spectrometry AAS. The percentage content of nitrogen in wood samples was determined by elementary analysis EA. Slight differences in nitrogen and silicon content recorded in wood samples following impregnation and leaching confirm the permanent character of bonding between the propolis-silane-caffeine preparation and wood. The stable character of Si-C and Si-O bonds was shown in IR spectra and discussed in detail in this paper.

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“…The latter is degraded by numerous micro-organisms in nature (Schwarz 2001 whereas the crystalline form is degraded only by a limited group of organisms, mostly fungi (particularly brown-rots) able to produce a cellulolytic enzyme system consisting of endo-1,4-β-glucanase, exo-1,4-β-glucanase, and 1,4-β-glucosidase (see e.g. Cohen et al 2005, Yoon & Kim 2005, Boonstra et al 2006, Irbe et al 2006; see Table 1).…”

Section: Hydrolytic Enzymes: Enzymes Degrading Cellulosementioning

confidence: 99%

Wood production, wood technology, and biotechnological impacts

Kües¹

2007

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On the changes of pinewood (Pinus sylvestris L.) Chemical composition and ultrastructure during the attack by brown-rot fungi Postia placenta and Coniophora puteana

Cited by 69 publications

References 15 publications

Mode of action of brown rot decay resistance in modified wood: a review

Mode of action of brown rot decay resistance in modified wood: a review

Chemical characterization of wood treated with a formulation based on propolis, caffeine and organosilanes

Wood production, wood technology, and biotechnological impacts

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