Yacon juice as culture and cryoprotectant medium for Latilactobacillus sakei and Staphylococcus vitulinus autochthonous strains
Abstract Yacon is mainly constituted of water and carbohydrates [single sugars and fructooligosaccharides (FOS)], thus being an excellent alternative for the growth and preservation of bacterial culture. Latilactobacillus sakei ACU-2 and Staphylococcus vitulinus ACU-10 comprised the autochthonous starter culture SAS-1 designed for the manufacture of dry sausages. This study evaluated the use of yacon juice as a potential growth medium and cryoprotectant for these bacteria. The growth medium was prepared with yacon juice supplemented with peptone and dipotassium phosphate. After growing, cells were resuspended in yacon juice (5, 10 and 25 mL/100 mL) and lyophilized. Viable cells were count before, immediately after lyophilization, and along 6 months of refrigerated storage. Both bacteria grew in every yacon concentration tested; however, juice concentration affected their growth. Latilactobacillus sakei grew at μ = 0.256 ± 0.01 giving the highest bacterial density at 10 mL/100 mL (Log DOmax 0.33 ± 0.01). While 5 mL/100 mL yacon juice provided the best conditions for S. vitulinus growth (μ = 0.215 ± 0.016; Log DOmax 0.32 ± 0.01). After lyophilization, the survival rate was 91.1% for L. sakei and 65.8% for S. vitulinus. Throughout storage, high cell counts suggested good stability of both bacteria. Results revealed that yacon juice comprises a nutritive substrate for the growth and cryopreservation of tested strains from the genus Latilactobacillus and Staphylococcus.
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Instituto de Tecnologia de Alimentos - ITAL
2023
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oai:scielo:S1981-672320230001004022023-02-02Yacon juice as culture and cryoprotectant medium for Latilactobacillus sakei and Staphylococcus vitulinus autochthonous strainsPalavecino Prpich,NoeliaSanabria,ErnestoGliemmo,María FernandaCayré,María ElisaCastro,Marcela Paola Culture media Freeze-drying process Starter culture Survival rates Nutritive substrate Cryopreservation Abstract Yacon is mainly constituted of water and carbohydrates [single sugars and fructooligosaccharides (FOS)], thus being an excellent alternative for the growth and preservation of bacterial culture. Latilactobacillus sakei ACU-2 and Staphylococcus vitulinus ACU-10 comprised the autochthonous starter culture SAS-1 designed for the manufacture of dry sausages. This study evaluated the use of yacon juice as a potential growth medium and cryoprotectant for these bacteria. The growth medium was prepared with yacon juice supplemented with peptone and dipotassium phosphate. After growing, cells were resuspended in yacon juice (5, 10 and 25 mL/100 mL) and lyophilized. Viable cells were count before, immediately after lyophilization, and along 6 months of refrigerated storage. Both bacteria grew in every yacon concentration tested; however, juice concentration affected their growth. Latilactobacillus sakei grew at μ = 0.256 ± 0.01 giving the highest bacterial density at 10 mL/100 mL (Log DOmax 0.33 ± 0.01). While 5 mL/100 mL yacon juice provided the best conditions for S. vitulinus growth (μ = 0.215 ± 0.016; Log DOmax 0.32 ± 0.01). After lyophilization, the survival rate was 91.1% for L. sakei and 65.8% for S. vitulinus. Throughout storage, high cell counts suggested good stability of both bacteria. Results revealed that yacon juice comprises a nutritive substrate for the growth and cryopreservation of tested strains from the genus Latilactobacillus and Staphylococcus.info:eu-repo/semantics/openAccessInstituto de Tecnologia de Alimentos - ITALBrazilian Journal of Food Technology v.26 20232023-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1981-67232023000100402en10.1590/1981-6723.11922 |
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Palavecino Prpich,Noelia Sanabria,Ernesto Gliemmo,María Fernanda Cayré,María Elisa Castro,Marcela Paola |
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Palavecino Prpich,Noelia Sanabria,Ernesto Gliemmo,María Fernanda Cayré,María Elisa Castro,Marcela Paola Yacon juice as culture and cryoprotectant medium for Latilactobacillus sakei and Staphylococcus vitulinus autochthonous strains |
author_facet |
Palavecino Prpich,Noelia Sanabria,Ernesto Gliemmo,María Fernanda Cayré,María Elisa Castro,Marcela Paola |
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Palavecino Prpich,Noelia |
title |
Yacon juice as culture and cryoprotectant medium for Latilactobacillus sakei and Staphylococcus vitulinus autochthonous strains |
title_short |
Yacon juice as culture and cryoprotectant medium for Latilactobacillus sakei and Staphylococcus vitulinus autochthonous strains |
title_full |
Yacon juice as culture and cryoprotectant medium for Latilactobacillus sakei and Staphylococcus vitulinus autochthonous strains |
title_fullStr |
Yacon juice as culture and cryoprotectant medium for Latilactobacillus sakei and Staphylococcus vitulinus autochthonous strains |
title_full_unstemmed |
Yacon juice as culture and cryoprotectant medium for Latilactobacillus sakei and Staphylococcus vitulinus autochthonous strains |
title_sort |
yacon juice as culture and cryoprotectant medium for latilactobacillus sakei and staphylococcus vitulinus autochthonous strains |
description |
Abstract Yacon is mainly constituted of water and carbohydrates [single sugars and fructooligosaccharides (FOS)], thus being an excellent alternative for the growth and preservation of bacterial culture. Latilactobacillus sakei ACU-2 and Staphylococcus vitulinus ACU-10 comprised the autochthonous starter culture SAS-1 designed for the manufacture of dry sausages. This study evaluated the use of yacon juice as a potential growth medium and cryoprotectant for these bacteria. The growth medium was prepared with yacon juice supplemented with peptone and dipotassium phosphate. After growing, cells were resuspended in yacon juice (5, 10 and 25 mL/100 mL) and lyophilized. Viable cells were count before, immediately after lyophilization, and along 6 months of refrigerated storage. Both bacteria grew in every yacon concentration tested; however, juice concentration affected their growth. Latilactobacillus sakei grew at μ = 0.256 ± 0.01 giving the highest bacterial density at 10 mL/100 mL (Log DOmax 0.33 ± 0.01). While 5 mL/100 mL yacon juice provided the best conditions for S. vitulinus growth (μ = 0.215 ± 0.016; Log DOmax 0.32 ± 0.01). After lyophilization, the survival rate was 91.1% for L. sakei and 65.8% for S. vitulinus. Throughout storage, high cell counts suggested good stability of both bacteria. Results revealed that yacon juice comprises a nutritive substrate for the growth and cryopreservation of tested strains from the genus Latilactobacillus and Staphylococcus. |
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Instituto de Tecnologia de Alimentos - ITAL |
publishDate |
2023 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1981-67232023000100402 |
work_keys_str_mv |
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