Mycobiota in soil of different degree of degradation in perennial fruit plantations

Abstract

The number and species composition of micromycetes in different types of soils with different degree of degradation in perennial plantations of Malus Mill., Juglans regia L., Corylus avellana L., Prunus domestica L., Pyrus communis L., Rubus idaeus L., Fragaria vesca L. were analyzed. The research was carried out during 2012–2022 years in enterprises of different types of ownership located at the area of the Lviv, Volyn, Vinnytsia, Drinpropetrovsk, Kharkiv and Kherson Oblasts. The obtained results confirmed the differentiation in the number of micromycetes based on the type of soil and the degree of degradation. The smallest number and species composition of mycobiota were found in slightly and severely degraded soils. In total, among the studied samples of different types of soils, 109 species of micromycetes belonging to 25 genera of two divisions Zygomycota and Ascomycota were differentiated and identified, including 14 species (almost 13%) which are pathogenic or producers of mycotoxins and present biohazard. In most cases these species were found in moderately degraded, ordinary chernozem with a low content of humus and its frequency of occurrence was 29.5–48.5%. Among 13 pathogenic species of micromycetes, in moderately degraded ordinary chernozem with a low content of humus, four species non-typical for garden agnocenoses were detected: (A. flavus Link (frequence of occurence 32.5%), A. parasiticus Speare (34.8%), A. pseudotamari Bennet and Klich (37.3%), Claviceps purpurea (Fr.)Tul. (29.5%)). In slightly degraded sod-podzolic soil, three pathogenic species Botrytis cinerea Pers ex Fr, Paecilomyces lilacinum (Thom) Samson, P. verrucosum Dierckx var. Cyclopium (Westling) Samson, Stolk, Hadlok were identified, and their frequency of occurrence was 35.7–45.2%. In non-degraded soils, 93 species of micromycetes were found, including four pathogens (Botrytis cinerea Pers ex Fr, Paecilomyces lilacinum (Thom) Samson, P. verrucosum Dierckx var. cyclopium (Westling) Samson, Stolk, Hadlok, P. expansum Lk), and their frequency of occurrence was 27.5–40.7%.