Walnut (J. regia) agro-residues as a rich source of phenolic compounds

Medič, Aljaž (avtor), Jakopič, Jerneja (avtor), Solar, Anita (avtor), Hudina, Metka (avtor), Veberič, Robert (avtor)

The present study was designed to identify and quantify the major phenolic compounds (phenolics) in the inner and outer husks, buds and bark of the Persian walnut, Juglans regia L. A comparison across six different cultivars grown in Slovenia was also carried out: ‘Fernor’, ‘Fernette’, ‘Franquette’, ‘Sava’, ‘Krka’ and ‘Rubina’. A total of 83 compounds were identified, which included 25 naphthoquinones, 15 hydroxycinnamic acids, 8 hydroxybenzoic acids, 13 flavanols, 2 flavones, 1 flavanone and 19 flavonols. For the first time, 38 phenolics in the husks, 57 phenolics in the buds and 29 phenolics in the bark were presented in J. regia within this study. Naphthoquinones were the major phenolics determined, approximately 75% of all analysed phenolics in the inner husk, 85% in the outer husk, 50% in buds and 80% in bark. The highest content of phenolics was found in the walnut buds, followed by the bark, the inner husk and the outer husk. On the basis of these high phenolic contents, walnut husks, buds and bark represented valuable by-products of the walnut tree. These data also show origin-related phenolic contents across the cultivars, and thus these phenolic profiles might serve to define the origins of different walnut cultivars.

• Jezik: Angleški jezik
• Ključne besede: hydrojuglone, juglone, naphthoquinones, phenolic compounds, 1, 4–naphthoquinone, bark, buds, husk
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: 24 str.
• Številčenje: Vol. 10, iss. 6, art. 535
• PID: 20.500.12556/RUL-135592
• UDK: 634.1/.7
• ISSN pri članku: 2079-7737
• DOI: 10.3390/biology10060535
• COBISS.SI-ID: 67153667
• Datum objave v RUL: 21.03.2022

Gradivo je del revije

• Naslov: Biology
• Skrajšan naslov: Biology
• Založnik: MDPI
• ISSN: 2079-7737
• COBISS.SI-ID: 523004441

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.
• Začetek licenciranja: 15.06.2021

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: oreh, Juglans regia, lupina, fenolne spojine

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P4-0013
• Naslov: Hortikultura