Romanian Journal of Biology - Plant Biology

ROMANIAN ACADEMY
Institute of Biology -Bucharest



BIODIVERSITY OF FUSARIUM OXYSPORUM (SCHLECHT.) SNYD. ET HANS. ISOLATES IN THE REPUBLIC OF MOLDOVA

GALINA LUPASCU, NICOLAE CRISTEA, SVETLANA GAVZER





 Abstract:


   The purpose of the research was to study: i) the biodiversity of Fusarium oxysporum isolates on the territory of the Republic of Moldova; ii) the peculiarities of the interaction between the host plant (common wheat) and the F. oxysporum isolate.The following were used as research material: i) 40 isolates of the variety F. oxysporum var. orthoceras (F. o.o), collected in different localities of the Republic of Moldova. ii) three genotypes of common winter wheat. The research was carried out in laboratory conditions. The obtained data were processed using modern statistical methods (cluster analysis, factor analysis) in the STATISTICA 7 software package. It was found that the F. o.o isolates collected exhibit a pronounced morphological polymorphism in terms of mycelium color and density, colony shape, radial growth rate of colonies under optimal temperature conditions (24°C) and thermal alternation 24/9/24°C, 24/35/24°C. Diversity based on the mentioned characters was also found in the isolates from the same locality. Treating wheat grains with culture filtrates of F. o.o isolates and cultivating seedlings at different temperature conditions (22-23°C), 22-23/8-9/22-23°C demonstrated the manifestation of different virulence phenotypes that did not depend on the reaction of the isolates to low or high temperature in vitro, but on the specificity of interaction with the host plant, which was reflected in the cluster organization of the isolates.




 Citation:


   GALINA LUPASCU, NICOLAE CRISTEA, SVETLANA GAVZER, 2025. BIODIVERSITY OF FUSARIUM OXYSPORUM (SCHLECHT.) SNYD. ET HANS. ISOLATES IN THE REPUBLIC OF MOLDOVA, Romanian Journal of Biology - Plant Biology, 70(1-2): 75–86. DOI: DOI: 10.59277/RJB-PB.2025.1-2.06.




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