Naslov
Dutch elm disease in the area of Kopački rit – preliminary study

Autori
Ivana, Gajski ; Kristina, Boljevac ; Marilena Idžojtić ; Mirna Ćurković-Perica ; Zdenko, Turniški ; Ljiljana, Krstin ; Zorana Katanić

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Zbornik sažetaka 11. simpozija s međunarodnim sudjelovanjem Kopački rit jučer, danas, sutra 2022. / Ozimec, Siniša ; Bogut, Irella ; Bašić, Ivo ; Rožac, Vlatko ; Stević, Filip ; Popović, Željko - : Javna ustanova "Park prirode Kopački rit", 2022, 58-59

Skup
11. simpozij s međunarodnim sudjelovanjem: Kopački rit - jučer, danas, sutra = 11h Symposium with International Participation: Kopački rit - past, present, future

Mjesto i datum
Osijek, Hrvatska, 29.09.2022. - 30.09.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
plant diseases, phytopathogenic fungi, Ophiostoma novo-ulmi, Ulmus

Sažetak
Dutch elm disease has been seriously threatening elms in Europe and North America. The disease is caused by pathogenic fungi of the genus Ophiostoma. It was initially caused by Ophiostoma ulmi which was introduced at the beginning of the 20th century. However, this species is no longer important in an epidemiological sense due to the emergence of another species named Ophiostoma novo-ulmi in the middle of the 20th century. As a more virulent pathogen that was better adapted to the temperate climate, O. novo-ulmi eventually completely replaced O. ulmi. Two subspecies of O. novo-ulmi have been described: O. novo-ulmi ssp. novo-ulmi and O. novo-ulmi ssp. americana. Initially, they appeared at distant locations, but nowadays their areas are largely overlapping. The reproductive barrier between the two subspecies is only partial and their fertile hybrids are emerging and are frequently found in nature. The aim of this study was to confirm the presence of Dutch elm disease in the northeastern part of the Republic of Croatia. A preliminary investigation was conducted by sampling several elm trees showing visible external and internal disease symptoms in the area of Kopački rit in 2022. Ophiostoma novo-ulmi was isolated from elm twigs of all sampled trees and maintained at pure culture on MEA plates. Analysis of the col1 and cu genes was used for molecular identification of isolates and subspecies determination. Furthermore, all isolates were assigned to MAT-1 or MAT-2 type which determines their sexual compatibility. Results of this study proved the presence of Dutch elm disease at the investigated location and point to the possible high diversity of the pathogen since the occurrence of the hybrids as well as the presence of isolates of both MAT types were detected. Further investigations should be conducted in order to assess the abundance of the elms and the incidence of Dutch elm disease in the area of Kopački rit and adjacent areas as well as to provide a better molecular characterization of the pathogen populations in this part of Croatia.

Izvorni jezik
Hrvatski, engleski

Znanstvena područja
Biologija, Šumarstvo

POVEZANOST RADA