Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Antifungal Activity of Streptomyces spp. Extracts in vitro and on Post-harvest Tomato Fruits Against Plant Pathogenic Fungi

David Tomás Montesdeoca-Flores
* ORCID logo ,
Eduardo Hernández-Bolaños
,
Milagros León-Barrios
ORCID logo ,
Eduardo Hernández-Amador
,
Selene Díaz-González
ORCID logo ,
Néstor Abreu-Acosta
,
Juan Cristo Luis-Jorge
* ORCID logo
Version 1 : Received: 10 November 2023 / Approved: 13 November 2023 / Online: 13 November 2023 (11:02:18 CET)

A peer-reviewed article of this Preprint also exists.

Montesdeoca-Flores, D.T.; Hernández-Bolaños, E.; León-Barrios, M.; Hernández-Amador, E.; Díaz-González, S.; Abreu-Acosta, N.; Luis-Jorge, J.C. Antifungal Activity of Streptomyces spp. Extracts In Vitro and on Post-Harvest Tomato Fruits against Plant Pathogenic Fungi. Horticulturae 2023, 9, 1319. Montesdeoca-Flores, D.T.; Hernández-Bolaños, E.; León-Barrios, M.; Hernández-Amador, E.; Díaz-González, S.; Abreu-Acosta, N.; Luis-Jorge, J.C. Antifungal Activity of Streptomyces spp. Extracts In Vitro and on Post-Harvest Tomato Fruits against Plant Pathogenic Fungi. Horticulturae 2023, 9, 1319.

Abstract

Plant pathogenic fungi are the most important cause of losses in agriculture. In the face of the overuse of synthetic fungicides, natural products are an encouraging alternative to control these plant pathogenic fungi. In this study, we tested the antifungal capacity of metabolites produced by strains of the genus Streptomyces against the plant pathogenic fungi Alternaria alternata, Botrytis cinerea and Fusarium oxysporum. In addition, we investigated the feasibility of applying these metabolites in a postharvest setting for the control of B. cinerea on cherry tomato fruits. The results revealed the ability of the strains, especially Streptomyces netropsis, to inhibit the growth of plant pathogenic fungi and, in some cases, the sporulation of these fungi. In addition, we observed an interesting phenomenon in which Streptomyces strains physically encapsulated the mycelium of the fungi, which contributed to their inhibition. Finally, the protective activity of S. netropsis extract on Cherry tomato fruits infected with B. cinerea was demonstrated. In conclusion, this research opens the door to studies on the understanding of physical microbial interactions in natural environments and holds promise in agriculture, especially in the protection of agricultural products during the post-harvest stage as a safer and more sustainable alternative.

Keywords

Actinomycetes; Streptomyces; Alternaria alternata; Botrytis cinerea; Fusarium oxysporum; Antifungal activity; postharvest

Subject

Biology and Life Sciences, Horticulture

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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