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Microb Pathog. 2016 Nov;100:263-267. doi: 10.1016/j.micpath.2016.10.009. Epub 2016 Oct 12.

Comparison of antifungal activity of extracts from different Juglans regia cultivars and juglone.

Author information

1
Department of Chromatographic Methods, Faculty of Chemistry, Maria Curie-Sklodowska University, Pl. Maria Curie-Sklodowska 3, 20-031, Lublin, Poland. Electronic address: dorota.wianowska@poczta.umcs.lublin.pl.
2
Department of Synthesis, Technology and Biotechnology of Biologically Active Products, Institute of Industrial Organic Chemistry, 6 Annopol St., 03-236, Warsaw, Poland.
3
Department of Chromatographic Methods, Faculty of Chemistry, Maria Curie-Sklodowska University, Pl. Maria Curie-Sklodowska 3, 20-031, Lublin, Poland.
4
Walnut Tree Garden Nursery, Urzejowice 146, Poland.

Abstract

This study discusses the similarities and differences between the antifungal activity of extracts from walnut green husks of Lake, Koszycki, UO1, UO2 and non-grafted cultivars as well as juglone against the plant pathogenic fungi such as Alternaria alternata, Rhizoctonia solani, Botrytis cinerea, Fusarium culmorum, Phytophthora infestans as well as Ascosphaera apis causing chalkbrood disease in honey bees. The obtained data show that the antifungal activities of the extracts do not always depend on the antifungal activity of juglone, and that they can be modulated by their other components. This fact allows us to conclude that juglone is not the only component of walnut green husk extracts which is responsible for the inhibition of mycelial growth. Phenolic compounds were found to be responsible for activity of the extracts and they can modify antifungal activity of juglone.

KEYWORDS:

Antifungal activity; Green husk; Juglone; Natural fungicide; Phenolic compounds; Walnut

PMID:
27744101
DOI:
10.1016/j.micpath.2016.10.009
[Indexed for MEDLINE]

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