Viability and stability of fungi isolated from lake La Izvor after lyophilization
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2023-12-14 14:20
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SYRBU, T., MOLDOVAN, Cristina, ŢURCAN, Olga. Viability and stability of fungi isolated from lake La Izvor after lyophilization. In: Biology and sustainable development, Ed. 20, 24-25 noiembrie 2022, Bacău. Bacău, Romania: 2022, Ediția 20, p. 32.
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Biology and sustainable development
Ediția 20, 2022
Simpozionul "Biology and sustainable development"
20, Bacău, Romania, 24-25 noiembrie 2022

Viability and stability of fungi isolated from lake La Izvor after lyophilization


Pag. 32-32

Syrbu T., Moldovan Cristina, Ţurcan Olga
 
Institute of Microbiology and Biotechnology
 
Disponibil în IBN: 14 decembrie 2022


Rezumat

Lyophilization is one of the safest and most durable methods of preservation of the viability and stability of the biological properties of microorganisms. Twenty strains of aquatic fungi, representatives of the genera: Penicillium, Talaromyces, Trichoderma, were lyophilized. The evaluation of the viability of fungal strains after lyophilization demonstrated that the viability of aquatic fungal strains, isolated from water, varies between 96.7% and 99.2%. The strains isolated from the biofilm, represented by the genera Talaromyces (2 strains) and Trichoderma (2 strains), also recorded a high viability after lyophilization. Their viability ranged from 96% to 97.7%. Also, the strains of fungi isolated from the silt, belonging to the genera Talaromyces (3 strains) and Trichoderma (5 strains), recorded a high viability after lyophilization, varying between 95.8 - 99%. A lower viability, after lyophilization, was recorded only in the strain Penicillium sp. (N12), which constituted only 92.8%, compared to the initial one, until lyophilization. As a result of examining the morpho-cultural characteristics (shape, size, colony edge, color, reverse, etc.) of aquatic microorganism cultures after lyophilization, no significant changes were detected.

Cuvinte-cheie
lyophilization, fungi, aquatic environment, viability, morpho-cultural characteristics