Cellular level chemical changes in Scots pine heartwood during incipient brown rot decay

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.

Download Full-text

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

Download Full-text

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.

Download Full-text

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

Download Full-text

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

Download Full-text

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

Annals of Forest Science ◽

10.1051/forest:2008035 ◽

2008 ◽

Vol 65 (6) ◽

pp. 610-610 ◽

Cited By ~ 9

Author(s):

Outi Karppanen ◽

Martti Venäläinen ◽

Anni M. Harju ◽

Tapio Laakso

Keyword(s):

Chemical Composition ◽

Scots Pine ◽

Water Adsorption ◽

Brown Rot ◽

Brown Rot Decay

Download Full-text

Effect of Water Leaching on Photodegraded Scots Pine and Spruce Timbers Monitored by FTIR Spectroscopy

Forests ◽

10.3390/f12070833 ◽

2021 ◽

Vol 12 (7) ◽

pp. 833

Author(s):

Edina Preklet ◽

László Tolvaj ◽

Eszter Visi-Rajczi ◽

Tamás Hofmann

Keyword(s):

Ftir Spectroscopy ◽

Scots Pine ◽

Uv Irradiation ◽

Chemical Elements ◽

Uv Light ◽

Carbonyl Groups ◽

Water Leaching ◽

Absorption Bands ◽

Chemical Changes ◽

Absorption Increase

The goal of this research was the systematic study and comparison of the divided individual effects of UV light irradiation and water leaching during artificial weathering. Spruce (Picea abies Karst.) and Scots pine (Pinus sylvestris L.) samples were irradiated by ultraviolet (UV) light. Another sequence of samples was treated with the combination of UV irradiation and water leaching. The total extent of UV treatment was 20 days for both series of samples. Time relation of UV irradiation and water leaching was 2:1. The chemical changes were observed by FTIR spectroscopy. The difference spectrum was used for determination of the chemical changes. Degradation of lignin was greater for the leached samples than for the pure UV treated samples. Scots pine suffered greater lignin degradation than spruce, and produced higher absorption increase on the absorption region of unconjugated carbonyls. The unconjugated carbonyl groups were the most responsive chemical elements to leaching. Spruce was more susceptible to leaching of unconjugated carbonyl groups than Scots pine. Two absorption bands of unconjugated carbonyl groups at 1706 and 1764 cm−1 wavenumbers were produced by photodegradation. The absorption band at 1764 cm−1 was more sensitive to water leaching than the band at 1706 cm−1.

Download Full-text