Resistance of Scots pine wood to Brown-rot fungi after long-term forest fertilization

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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Effects of lateral wood zone on brown rot resistance of untreated and linseed oil-impregnated Scots pine wood

European Journal of Wood and Wood Products ◽

10.1007/s00107-012-0604-0 ◽

2012 ◽

Vol 70 (5) ◽

pp. 771-773 ◽

Cited By ~ 2

Author(s):

Thomas Ulvcrona ◽

Per Otto Flæte ◽

Gry Alfredsen

Keyword(s):

Scots Pine ◽

Linseed Oil ◽

Brown Rot ◽

Pine Wood

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Oil in Water Nanoemulsions Loaded with Tebuconazole for Populus Wood Protection against White- and Brown-Rot Fungi

Forests ◽

10.3390/f12091234 ◽

2021 ◽

Vol 12 (9) ◽

pp. 1234

Author(s):

Alejandro Lucia ◽

Mónica Murace ◽

Gastón Sartor ◽

Gabriel Keil ◽

Ricardo Cámera ◽

...

Keyword(s):

Beech Wood ◽

Brown Rot ◽

Vacuum System ◽

Diameter Distribution ◽

Hydrodynamic Diameter ◽

Promising Alternative ◽

Pycnoporus Sanguineus ◽

Brown Rot Fungi ◽

Wood Protection

Eugenol in water nanoemulsions loaded with tebuconazole appear as a very promising alternative formulations for wood protection against xylophagous fungi that are the main species responsible for different rots in wood structures. The dispersions as prepared and upon dilution (impregnation mixtures) were characterized by the apparent hydrodynamic diameter distribution of the oil droplets loaded with tebuconazole and their long-term stability. The impregnation mixtures were applied on wood of Populus canadensis I-214 clone by using a pressure-vacuum system, and the effectiveness against fungal degradation by Gloeophyllum sepiarium and Pycnoporus sanguineus fungi was determined. The retention of tebuconazole in wood was about 40% of the amount contained in the impregnation mixtures. The results showed that the impregnation process leads to a long-term antifungal protection to the wood, with the mass loss after 16 weeks being reduced more than 10 times in relation to the control (untreated poplar wood) and the reference wood (untreated beech wood).

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Secondary Metabolite Concentrations and Terpene Emissions of Scots Pine Xylem after Long-Term Forest Fertilization

Journal of Environmental Quality ◽

10.2134/jeq2002.1694 ◽

2002 ◽

Vol 31 (5) ◽

pp. 1694-1701 ◽

Cited By ~ 21

Author(s):

S. Turtola ◽

A.-M. Manninen ◽

J. K. Holopainen ◽

T. Levula ◽

H. Raitio ◽

...

Keyword(s):

Secondary Metabolite ◽

Scots Pine ◽

Forest Fertilization ◽

Metabolite Concentrations

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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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