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A comparison of the virulence of selected Pythium, Globisporangium, Phytopythium and Phytophthora species against strawberry plants

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Abstract

A total of twenty-five isolates of species Phytophthora cactorum, P. citrophthora, Pythium dissotocum complex, Py. aphanidermatum, Globisporangium heterothallicum, G. ultimum, Phytopythium vexans, Phy. mercuriale and Phy. litorale, isolated from strawberry plants grown in the Czech Republic, were tested to compare their pathogenicity to this host. The tests were performed using the detached leaves technique on five strawberry cultivars—Elsanta, Karmen, Sonata, Honeoye, and Rumba. Both the size and frequency of lesions formed on the strawberry leaflets were evaluated; only weak or no correlation between the size and frequency of developed lesions was discovered. The variability in the level of these correlations between combinations of pathogen isolate and strawberry cultivar corresponded to the existence of two independent resistance components one of them being related to the penetration and the other one to the post-penetration phase of the infection. All tested isolates were verified as virulent, although their virulence against different strawberry cultivars was rather variable; isolates of Phytophthora cactorum performed high variability of the virulence as well. Isolates of Phytophthora citrophthora, Globisporangium ultimum and Phytopythium litorale were evaluated as a most virulent. In general, the most sensitive strawberry cultivar was Elsanta, while the most resistant was Karmen.

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Availability of data and material

The DNA sequences used in species determination were deposited into NCBI GenBank database. All another data are available from the corresponding author on reasonable request.

Code availability

Softwares used in data analysis are commonly available. Assess 2.0 software: https://my.apsnet.org/APSStore/Product-Detail.aspx?WebsiteKey=2661527A-8D44-496C-A730-8CFEB6239BE7&iProductCode=43696. Statistica 13.3 (TIBCO Ltd.): https://docs.tibco.com/products/tibco-statistica-13-3-0.

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Funding

The work was supported by project of the Ministry of Agriculture of the Czech Republic QK1710377 and by institutional support MZE-RO0418.

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Both authors contributed to the study conception and design. Material preparation and data collection were performed by IS, and entire draft, the data analysis and manuscript writing were performed by MP. Both authors read and approved the final manuscript.

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Correspondence to Matěj Pánek.

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Pánek, M., Střížková, I. A comparison of the virulence of selected Pythium, Globisporangium, Phytopythium and Phytophthora species against strawberry plants. J Plant Dis Prot 128, 1447–1458 (2021). https://doi.org/10.1007/s41348-021-00531-1

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  • DOI: https://doi.org/10.1007/s41348-021-00531-1

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