The effect of brown-rot decay on water adsorption and chemical composition of Scots pine heartwood

Abstract Stilbenes are abundant in the heartwood of Scots pine (Pinus sylvestris L.) and are known to have strong antifungal efficiency. In this study, Scots pine sapwood blocks were impregnated with crude heartwood extract containing the stilbenes pinosylvin (PS) and the pinosylvin monomethyl ether (PSM). Impregnated blocks were submitted to brown-rot fungi, Coniophora puteana, Gloeophyllum trabeum, and Rhodonia (Poria) placenta, and fungal growth test and decay test were performed. Both tests showed that the impregnation with a high concentration of stilbenes (60 mg g-1 dry wood) significantly suppressed the growth of fungi and slowed down the decay process of wood blocks, especially in case of G. trabeum. However, chemical analysis showed that PS and PSM were degraded by all the three types of fungi, obviously via modification to resveratrol and methylresveratrol. Rhodonia placenta displayed the fastest rate of degradation. Thus, impregnation with biodegradable stilbenes could be a viable alternative for wood preservation only in service situations with low or transient risk of decay.

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Chemical factors affecting the brown-rot decay resistance of Scots pine heartwood

Trees ◽

10.1007/s00468-002-0233-z ◽

2003 ◽

Vol 17 (3) ◽

pp. 263-268 ◽

Cited By ~ 41

Author(s):

Anni M. Harju ◽

Martti Venäläinen ◽

Seija Anttonen ◽

Hannu Viitanen ◽

Pirjo Kainulainen ◽

...

Keyword(s):

Scots Pine ◽

Brown Rot ◽

Decay Resistance ◽

Factors Affecting ◽

Chemical Factors ◽

Brown Rot Decay

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Effects of white rot and brown rot decay on the drilling resistance measurements in wood

Holzforschung ◽

10.1515/hf-2017-0204 ◽

2018 ◽

Vol 72 (10) ◽

pp. 905-913 ◽

Cited By ~ 3

Author(s):

Evgenii Sharapov ◽

Christian Brischke ◽

Holger Militz ◽

Elena Smirnova

Keyword(s):

Scots Pine ◽

Free Water ◽

Brown Rot ◽

European Beech ◽

White Rot ◽

Drilling Tool ◽

Significant Difference ◽

Brown Rot Decay ◽

Drilling Resistance ◽

The Impact

AbstractAn IML-RESI PD 400 drilling tool and a standard spade drill bit (IML System GmbH, Wiesloch, Germany) were used to study the impact of white and brown rot decay on drilling resistance (DR) measurements in wood. In total, 720 drillings were made in specimens of Scots pine (Pinus sylvestrisL.) heartwood and sapwood, European beech (Fagus sylvaticaL.) and English oak (Quercus roburL.), which were decayed byConiophora puteanaandTrametes versicolor. Drillings were made with specimens conditioned in normal climate (20°C/65% RH) and with specimens vacuum-impregnated in water. DR and feeding force (FF) were negatively correlated with mass loss (ML) due to fungal decay. The intensity of reduction was higher for DR than for FF with increasing ML for all decay types and moisture contents (MCs). A significant difference (at 95% confidence level) in DR was found between decay types using water-saturated (WS) Scots pine specimens (3–35% ML). In most cases, DR revealed a higher predictive power of the models for ML prediction than FF. Free water in decayed specimens significantly reduced the DR and FF. Hence, the effect of ML on DR and FF of decayed and WS wood was less prominent.

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Assessment of the use of dynamic mechanical analysis to investigate initial onset of brown rot decay of Scots pine ( Pinus sylvestris L. )

International Biodeterioration & Biodegradation ◽

10.1016/j.ibiod.2017.02.002 ◽

2017 ◽

Vol 120 ◽

pp. 1-5 ◽

Cited By ~ 2

Author(s):

G.A. Ormondroyd ◽

G. Alfredsen ◽

R.T. Durai Prabhakaran ◽

S.F. Curling ◽

B.K. Stefanowski ◽

...

Keyword(s):

Pinus Sylvestris ◽

Dynamic Mechanical Analysis ◽

Scots Pine ◽

Brown Rot ◽

Mechanical Analysis ◽

Dynamic Mechanical ◽

Initial Onset ◽

Brown Rot Decay

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The concentration of phenolics in brown-rot decay resistant and susceptible Scots pine heartwood

Wood Science and Technology ◽

10.1007/s00226-004-0226-8 ◽

2004 ◽

Vol 38 (2) ◽

pp. 109-118 ◽

Cited By ~ 31

Author(s):

Martti Ven�l�inen ◽

Pirkko Velling ◽

Anni M. Harju ◽

Pekka Saranp�� ◽

Pirjo Kainulainen ◽

...

Keyword(s):

Scots Pine ◽

Brown Rot ◽

Brown Rot Decay

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Prediction model based on chemical composition change for the mechanical degradation of Korean pine (Pinus koraiensis) after brown-rot fungi (Gloeophyllum trabeum) invasion

Holzforschung ◽

10.1515/hf-2021-0082 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Lipeng Zhang ◽

Qifang Xie ◽

Liujie Yang ◽

Yajie Wu ◽

Xingxia Ma

Keyword(s):

Chemical Composition ◽

Mass Loss ◽

Decay Time ◽

Brown Rot ◽

Strength Loss ◽

Gloeophyllum Trabeum ◽

Korean Pine ◽

Composition Change ◽

Brown Rot Decay ◽

Loss Rates

Abstract In order to predict the mechanical properties of Korean pine after brown-rot decay based on its chemical composition change, 252 samples were prepared and exposed to a 14-week accelerated laboratory decay test using the brown-rot fungus Gloeophyllum trabeum. The mass loss, parallel-to-grain compressive strength, parallel-to-grain tensile strength and bending strengths were tested. Then chemical components and scanning electron micrograph analysis were conducted every two weeks. Results indicated that the mass loss rates of the samples increased with the increasing decay time and were negatively correlated with the sample volume. The strength loss rates were positively correlated with the decay time and mass loss rates. After 14 weeks the average strength loss rates of the parallel-to-grain compressive, tensile and bending samples reached 32%, 41% and 41%, respectively. Strengths degradation was found sensitive to the change of cellulose and hemicellulose contents. Further, mathematical regression models were proposed based on the content changes of the cellulose and hemicellulose to quantitatively predict the degradation of the strengths of Korean pine after brown-rot decay.

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Changes in chemical composition of decayed Scots pine and beech wood

Science and Engineering of Composite Materials ◽

10.1515/secm-2013-0180 ◽

2014 ◽

Vol 21 (4) ◽

pp. 589-595 ◽

Cited By ~ 6

Author(s):

Eylem Dizman Tomak

Keyword(s):

Chemical Composition ◽

Ir Spectra ◽

Scots Pine ◽

Degradation Mechanism ◽

Beech Wood ◽

Accelerated Aging ◽

Brown Rot ◽

Brown Rot Fungi ◽

Decay Test ◽

Ft Ir

AbstractIn this study, changes in chemical composition of aged and unaged Scots pine and beech wood decayed by brown-rot fungi Coniophora puteana and Poria placenta were presented by Fourier transform infrared (FT-IR) spectra. Samples were exposed to six complete cycles of accelerated aging for 12 days and then subjected to brown-rot fungi attack for 8 weeks. Weight loss of samples was found to be 25–46% depending on wood and fungi species and being aged ones. Accelerated aging treatments seemed to have a slight role on chemical composition of Scots pine and beech samples while they increased biodegradation of samples. FT-IR spectra showed degradation of wood carbohydrates revealed by reduction of the peaks responsible for hemicellulose and cellulose at 1730, 1370, 1150, and 897 cm-1 in pine and 1730, 1370, 1027, and 897 cm-1 in beech. Stronger lignin peaks at 1650, 1593, 1506, 1455, 1422, 1261, and 1230 cm-1 in pine and 1650, 1506, 1455, and 1422 cm-1 in beech were obtained after decay test. FT-IR spectra of samples were consistent with the degradation mechanism of brown-rot fungi. In general, changes in the carbohydrate and lignin peaks were greater in samples exposed to accelerated aging treatments for both wood species.

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