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Article

Paenibacillus alvei K165 and Fusarium oxysporum F2: Potential Biocontrol Agents against Phaeomoniella chlamydospora in Grapevines

1
Laboratory of Plant Pathology, Agricultural University of Athens, 75 Iera Odos str., 11855 Athens, Greece
2
Laboratory of Mycology, Department of Viticulture, Vegetable Crops, Floriculture and Plant Protection, Hellenic Agricultural Organization Demeter, Mesa Katsampas 71003, Iraklio Crete, Greece
*
Author to whom correspondence should be addressed.
The first and second author contributed equally to this work.
Academic Editor: George Banilas
Plants 2021, 10(2), 207; https://doi.org/10.3390/plants10020207
Received: 28 December 2020 / Revised: 16 January 2021 / Accepted: 19 January 2021 / Published: 22 January 2021
(This article belongs to the Special Issue Grapevine Responses to Environmental Challenges)
In the last two decades grapevine trunk diseases (GTDs) have emerged as the most significant threat for grapevine sustainability worldwide. The tracheomycotic fungus Phaeomoniella chlamydospora (Pch) is the predominant GTD-associated species and cannot be controlled with available chemicals. In the present study, we evaluated the effectiveness of two microbial strains (Paenibacillus alvei K165 and Fusarium oxysporum F2) against Pch in grapevine. In vitro bioassays, performed in a growth culture medium simulating the xylem environment, indicated that F2 decreased Pch growth and sporulation, whereas K165 did not have any effect on Pch growth. In planta experiments revealed that root-drench and stem-puncture application of K165 and F2 reduced the endophytic relative DNA amount of Pch by 90% and 82%, respectively, compared to controls. However, wood discoloration, the typical symptom of Pch infection, was not reduced in the F2 treated grapevines. Nevertheless, the F2 treated grapevines harbored higher lignin levels compared to mocks, as it was also done by K165. Therefore, F2 and K165 have the potential to be used as biocontrol agents against Pch in grapevines. View Full-Text
Keywords: biological control; esca disease; lignin; plant defense biological control; esca disease; lignin; plant defense
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MDPI and ACS Style

Gkikas, F.-I.; Tako, A.; Gkizi, D.; Lagogianni, C.; Markakis, E.A.; Tjamos, S.E. Paenibacillus alvei K165 and Fusarium oxysporum F2: Potential Biocontrol Agents against Phaeomoniella chlamydospora in Grapevines. Plants 2021, 10, 207. https://doi.org/10.3390/plants10020207

AMA Style

Gkikas F-I, Tako A, Gkizi D, Lagogianni C, Markakis EA, Tjamos SE. Paenibacillus alvei K165 and Fusarium oxysporum F2: Potential Biocontrol Agents against Phaeomoniella chlamydospora in Grapevines. Plants. 2021; 10(2):207. https://doi.org/10.3390/plants10020207

Chicago/Turabian Style

Gkikas, Fedon-Ioannis, Alexandros Tako, Danai Gkizi, Christina Lagogianni, Emmanouil A. Markakis, and Sotirios E. Tjamos 2021. "Paenibacillus alvei K165 and Fusarium oxysporum F2: Potential Biocontrol Agents against Phaeomoniella chlamydospora in Grapevines" Plants 10, no. 2: 207. https://doi.org/10.3390/plants10020207

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