Murgašová, MichaelaKrempaská, VladimíraBeck, TeréziaŠevčíková, JankaVesteg, Matej2026-03-202026-03-202025978-80-572-0542-5https://repo.umb.sk/handle/123456789/1369In: Applied natural sciences 2025 : book of abstracts / rec. Daniela Ondrejovič Chmelová, Ingrid Turisová. 1. vyd. Trnava : Univerzita sv. Cyrila a Metoda v Trnave, 2025. ISBN 978-80-572-0542-5. Pp. 86-86.Composting is an aerobic process consisting of several phases, producing a stable and mature fertiliser. The first compost analysed in this study originates from the municipal composting plant, which serves for decomposition of kitchen waste, while the second compost is being commercially sold. The aim of this study was to isolate bacteria promoting plant growth from both composts. Samples from composts were incubated at 25 °C in various liquid cultivation media. Subsequently, selected colonies were inoculated onto fresh solid media and the bacterial composition of both composts was analyzed by MALDI TOF-MS after protein extraction. We were able to isolate several interesting bacterial species including Lysinibacillus xylanilyticus and Solibacillus silvestris from municipal compost. Pseudomonas citronellolis and Pseudomonas stutzeri were isolated from the commercially sold compost. These isolates have traits that are specific for plant-growth promoting bacteria or they can serve as biocontrol agents against infections causing many plant diseases. Isolates with these traits can thus significantly facilitate the growth, development or immunodefence of tomato (Solanum lycopersicum L.).enCC BY-NC Creative Commons Attribution-NonCommercial 4.0. Internationalinfo:eu-repo/semantics/openAccesskompostovaniebakteriálne izolátybacterial isolatesMALDI TOF-MSArticle