Lyophilisation of Streptomyces canosus CNMN-Ac-02 in the presence of zn sulfated polysaccharides from spirulina

The article presents the results concerning the influence of zinc sulfated polysaccharides (PSSZn) obtained from cyanobacterium Arthrospira platensis CNMNCB02 (spirulina) on the viability of Streptomyces canosus CNMN-Ac-02 strain after lyophilization and long-term storage. Supplementing the protective medium containing gelatin (2.5%) and glucose (7.5%) with PSSZn in the concentrations of 1.0; 5.0; 20.0; 30.0; and 50.0%/V increased the viability of the culture by 13.6-39.0% compared to control. The minimum morbidity and the high viability of 95.3-118.0% of the samples with PSSZn after one year of storage showed the efficiency of the latter in the protection and long-term storage of the strain. Significant difference in the viability of samples rehydrated with distilled water and those with the PSSZn solution in the concentrations of 0.1; 0.5; 5.0%/V revealed the possibility of using the PSSZn extract for revitalization of lyophilized strain