2. Articole

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Author: search.filters.author.Sîrbu, TamaraStart date: 2024

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    Aquatic basins – natural source of fungi with antifungal potential [Articol]
    (Editura USM, 2025) Sîrbu, Tamara; Moldovan, Cristina
    The study of aquatic fungi is an area of major interest in microbiology, due to their essential ecological role and valuable biotechnological potential. In this context, the purpose of the paper was to test 71 strains of aquatic micromycetes isolated from the water basins of Chisinau municipality, in order to evaluate their antifungal activity against phytopathogens of agricultural importance. The results showed that over 80% of the analysed strains showed high antifungal activity, the most effective being against Fusarium solani (93%) and Botrytis cinerea (85.9%). The Trichoderma genus was shown to have remarkable antifungal potential, with inhibition areas ranging from 16 to 40 mm. Following the tests, two strains - T. atrobruneum CNMN FD 25 and T. longibrachiatum CNMN FD 27 - were selected to obtain biopreparations, which demonstrated increased efficiency in inhibiting the development of phytopathogenic fungi.
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    Acțiunea antifungică a trichodermei atrobrunneum asupra unor fungi fitopatogeni cultivată în prezența unor substanțe utilizate în calitate de stimulatori în mediul de cultivare
    (CEP USM, 2024) Țurcan, Olga; Sîrbu, Tamara; Moldovan, Cristina; Chiselița, Oleg; Chiselița, Natalia
    The action of the cultivation medium and some substances used as stimulators on the productivity of the T. atrobrunneum CNMN FD 25 strain was studied. The obtained results allow us to summarize that of all the variations of media used for the cultivation of T. atrobrunneum, the M(Gl,Z) medium proved to be the most optimal, registering a productivity of 15 g/l. T. atrobrunneum cultivated on nutrient medium M (Gl, Z) has a strong antagonistic effect against phytopathogenic fungi: Alternaria alternata, Botrytis cinerea, Fusarium solani, Fusarium oxysporum, the diameter of the inhibition zones varied from 20 to 32 mm in relation to strain grown on M (Gl) and M (Z) medium, supplemented with iron compounds and exometabolites of S. cerevisiae.
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    Tulpini de trichoderma cu potențial antifungic înalt față de fitopatogeni
    (CEP USM, 2024) Sîrbu, Tamara; Moldovan, Cristina
    Fungal infections in agriculture lead to a significant decrease in crop yield, and their control can be carried out chemically or biologically. The biological way is more effective. In this study, the effectiveness of in vitro biological control against the fungal pathogens: A. alternata, B. cinerea, F. oxysporum and F. solani was evaluated, using Trichoderma atrobruneum CNMN FD 25 and Trichoderma longibrachiatum CNMN FD 27 strains as biological control agents. The obtained results demonstrated a high sensitivity of the metabolite solutions of Trichoderma strains to the tested phytopathogens, significantly reducing their growth. Therefore the strains T. atrobruneum CNMN FD 25 and T. longibrachiatum CNMN FD 27 can be used as biological control agents of crops.