Mycobiota of Potato Tubers Grown in Kamchatka Krai

This work studies the diversity of fungi isolated from diseased potato tubers grown in Kamchatka Krai. Species identification showed that 44 of 48 studied strains belonged to the Ascomycota (classes Dothideomycetes, Sord-ariomycetes, Saccharomycetes, Orbiliomycetes) and 4 strains to the Basidiomycota (class Agaricomycetes). Species affiliation analysis showed that they belonged to the following species: Ascomycota – Boeremia exigua, B. fove-ata, Clonostachys rosea, C. solani, Fusarium avenaceum, F. merismoides, F. oxysporum, F. sporotrichioides, F. tor-ulosum, Geotrichum candidum, Helminthosporium solani, Orbilia oligospora, Plectosphaerella sp., Trichocladium solani, Verticillium albo-atrum, Volutella sp.; Basidiomycota – Sistotrema brinkmannii, Rhizoctonia solani AG-3, Ceratobasidium sp. AG-I. The study showed that dominated pathogens were Boeremia exigua and B. foveata, Rhizoctonia solani, Helminthosporium solani, Trichocladium solani, Fusarium sp. Strains of these species were characterized by high pathogenicity. At the same time, species previously not observed on potatoes were also iso-lated. Among them were both nonpathogenic for potato tuber tissues (Sistotrema brinkmannii, Ceratobasidium sp. AG-I, F. merismoides) and weakly pathogenic Volutella sp. Strains of Arthrobotrys oligospora were found on tubers affected by the nematode. For a more complete understanding of the potato-associated mycobiota, it is neces-sary to continue research in unexplored areas of the Kamchatka Territory and the Russian Far East as a whole. © 2025 Elsevier B.V., All rights reserved.