The functioning of soil ecosystems greatly depends on the interactions occurring between soil biota communities. It is well known that earthworms are an important soil component that substantially affects its function, including their meaningful impact on the development of different phytopathogenic soil fungi. Phytopathogenic fungi are responsible for crop disease and cause great economic damage. It has previously been established that earthworms’ coelomic fluid can suppress the growth of phytopathogenic fungi, but the exact molecular mechanism is unknown. The present study aimed at broadening the proof of this observed phenomenon by investigating the effects of the coelomic fluid extract of three different earthworm species (Eisenia andrei, Dendrobaena veneta and Allolobophora chlorotica) on the growth of six different phytopathogenic fungi species (Berkeleyomyces basicola, Fusarium culmorum, Globisporangium irregulare, Rhizoctonia solani, Macrophomina phaseolina, and Sclerotinia sclerotiorum). Coelomic fluid extract was obtained by electrostimulation or usage of extraction buffer (only in case of A. chlorotica) and prepared in three different concentrations by diluting the obtained coelomic fluid with physiological saline. The coelomic fluid extract of the three investigated earthworm species had an inhibitory effect on the growth of all six phytopathogenic fungi species. The greatest inhibitory effect was achieved with the E. andrei coelomic fluid extract reducing the growth of R. solani fungi. The findings of this research confirm the antifungal activity of coelomic fluid obtained from earthworm species belonging to different ecological categories and may be of potential use in crop protection against phytopathogenic fungi.
In research into mosquitoes in the mountain regions of Croatia, a new species of mosquito for Croatian mosquito fauna has been identified. The Culex pipiens complex is represented with four sibling species. Culex torrentium belongs to this complex and morphologically differs from the other species only in the structure of male genitals. The presence of this species is determined based on the male genital structure and confirmed by mitochondrial cytochrome c oxidase molecular analysis. Specimens of these species have been found in all three mountain areas covered by this research: Slavonian mountains, Gorski Kotar area and central Velebit Mt. The lowest altitude where we found this species was 159 metres above sea level (m a.s.l.) in Pleternica, and the highest 906 m a.s.l. in Baške Oštarije. At all sites, the species Cx. torrentium was sampled in community with other species, but most frequently together with sibling species of Cx. pipiens (most probably the subspecies Cx. p. pipiens).
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