Sabina Berne (Avtor), Nataša Kovačević (Avtor), Damijana Kastelec (Avtor), Branka Javornik (Avtor), Sebastjan Radišek (Avtor)

Povzetek

(1) Background: Verticillium wilt (VW) of hop is a devastating disease caused by the soil-borne fungi Verticillium nonalfalfae and Verticillium dahliae. As suggested by quantitative trait locus (QTL) mapping and RNA-Seq analyses, the underlying molecular mechanisms of resistance in hop are complex, consisting of preformed and induced defense responses, including the synthesis of various phenolic compounds. (2) Methods: We determined the total polyphenolic content at two phenological stages in roots and stems of 14 hop varieties differing in VW resistance, examined the changes in the total polyphenols of VW resistant variety Wye Target (WT) and susceptible Celeia (CE) on infection with V. nonalfalfae, and assessed the antifungal activity of six commercial phenolic compounds and total polyphenolic extracts from roots and stems of VW resistant WT and susceptible CE on the growth of two different V. nonalfalfae hop pathotypes. (3) Results: Generally, total polyphenols were higher in roots than stems and increased with maturation of the hop. Before flowering, the majority of VW resistant varieties had a significantly higher content of total polyphenols in stems than susceptible varieties. At the symptomatic stage of VW disease, total polyphenols decreased in VW resistant WT and susceptible CE plants in both roots and stems. The antifungal activity of total polyphenolic extracts against V. nonalfalfae was higher in hop extracts from stems than those from roots. Among the tested phenolic compounds, only p-coumaric acid and tyrosol markedly restricted fungal growth. (4) Conclusions: Although the correlation between VW resistance and total polyphenols content is not straightforward, higher levels of total polyphenols in the stems of the majority of VW resistant hop varieties at early phenological stages probably contribute to fast and efficient activation of signaling pathways, leading to successful defense against V. nonalfalfae infection.

Ključne besede

Humulus lupulus;hmelj;Verticillium nonalfalfae;Verticillium dahliae;verticilijska uvelost;fenolne spojine;interakcija rastlina-patogen;kumarna kislina;odpornost rastlin;odpornost na bolezni;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL BF - Biotehniška fakulteta
UDK: 577.2
COBISS: 31470595 Povezava se bo odprla v novem oknu
ISSN: 2223-7747
Št. ogledov: 154
Št. prenosov: 55
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: Humulus lupulus;hmelj;Verticillium nonalfalfae;Verticillium dahliae;verticilijska uvelost;fenolne spojine;interakcija rastlina-patogen;kumarna kislina;odpornost rastlin;odpornost na bolezni;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-21 (1318)
Letnik: ǂVol. ǂ9
Zvezek: ǂno. ǂ10
Čas izdaje: 2020
DOI: 10.3390/plants9101318
ID: 14305982