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Comparison of the content of extractives in the bark of the trunk and the bark of the branches of Silver Fir (Abies alba Mill.)
ID Vek, Viljem (Avtor), ID Šmidovnik, Tjaša (Avtor), ID Humar, Miha (Avtor), ID Poljanšek, Ida (Avtor), ID Oven, Primož (Avtor)

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Izvleček
The main objective of our study was to investigate the possible differences in the chemical composition of extractives from the bark of silver fir (Abies alba) with respect to the location of the bark sample on the tree, viz. differences in extract composition between stem bark and branch bark samples. Extractives in the bark samples from branches, depending on the distance of the sample from the trunk, were also analysed, and the stem bark samples were analysed with respect to their inner and outer parts. The results of the chemical analysis of extractives were supported by information about their antifungal and antioxidant effects. After felling and sampling silver fir trees, the collected bark samples were ground and freeze-dried. Extraction of bark samples was followed by a system of accelerated extraction using only water as a solvent. The extracts were analysed chemically using gravimetry, spectrophotometry and chromatography. Free-radical-scavenging activity was measured using the DPPH method, and the antifungal effect towards three moulds and three wood-decaying fungi was investigated with antifungal assay using the agar well diffusion method. It was found that the moisture content in bark samples decreased intensively just after the bark samples were peeled off the stem. Detailed chromatographic analysis showed that the bark extracts contained 14 compounds, among which phenolic acids, flavonoids and lignans were found to be the characteristic ones. The content of hydrophilic extractives in the branch bark samples decreased with increasing distance of the sample location from the tree stem. The largest amounts of phenolic extractives were measured in stem bark, followed by branch bark sampled at the point at which the branch entered the tree. Analysis of the separated parts of the bark showed that the outer layers of stem bark contained larger amounts of phenolic extractives, as well catechin and epicatechin, compared to the inner layers. Concentrated extracts of branch bark showed the largest free-radical-scavenging activity among the investigated samples, while strong antifungal effects of the bark extract were not found.

Jezik:Angleški jezik
Ključne besede:Abies alba, bark, chromatography, antioxidant properties, antifungal properties
Vrsta gradiva:Članek v reviji
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:BF - Biotehniška fakulteta
Status publikacije:Objavljeno
Različica publikacije:Objavljena publikacija
Datum objave:27.12.2022
Leto izida:2023
Št. strani:13 str.
Številčenje:Vol. 28, no. 1
PID:20.500.12556/RUL-144043 Povezava se odpre v novem oknu
UDK:630*8
ISSN pri članku:1420-3049
DOI:10.3390/molecules28010225 Povezava se odpre v novem oknu
COBISS.SI-ID:139704067 Povezava se odpre v novem oknu
Datum objave v RUL:27.01.2023
Število ogledov:333
Število prenosov:48
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
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Gradivo je del revije

Naslov:Molecules
Skrajšan naslov:Molecules
Založnik:MDPI
ISSN:1420-3049
COBISS.SI-ID:18462981 Povezava se odpre v novem oknu

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:jelka, skorja, kromatografija, antioksidativne lastnosti, antimikrobne lastnosti

Projekti

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:L4-2623-2020
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Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:J2-1723-2019
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Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:V4-2017-2020
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Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P4-0015-2020
Naslov:Les in lignocelulozni kompoziti

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