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Key factors for the survival of Lactiplantibacillus plantarum IDCC 3501 in manufacturing and storage
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Key factors for the survival of Lactiplantibacillus plantarum IDCC 3501 in manufacturing and storage
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Journal Article
Key factors for the survival of Lactiplantibacillus plantarum IDCC 3501 in manufacturing and storage
2024
Overview
Functional microbiome development has steadily increased; with this, the viability of microbial strains must be maintained not only after the manufacturing process but also at the time of consumption. Survival is threatened by various unavoidable factors during freeze-drying and shelf storage. Here, the aim was to optimize the manufacturing process of the functional strain
Lactiplantibacillus plantarum
IDCC 3501 after freeze-drying and storage. Explosive growth was achieved using a medium composition with two nitrogen sources and a mineral, and growth was drastically improved by neutralizing the medium pH during the culture of
L. plantarum
IDCC 3501. Culture optimization involved a smaller cell size, leading to less intracellular free water. Moreover, when maltodextrin (MD) powder was directly added to the harvested cells, some intracellular free water was extracted from the bacterial cells, resulting in a dramatic increase in the viability of
L. plantarum
IDCC 3501 after freeze-drying and subsequent storage. Furthermore, MD enhanced survival in a dose-dependent manner. Bacterial survival was correlated with lysozyme tolerance; therefore, the positive result might have been caused by the osmotic dehydration of intracellular free water, which would potentially damage the bacterial cells via ice crystallization and/or a phase transition during freeze-drying. These critical factors of
L. plantarum
IDCC 3501 processing provide perspectives on survival issues for manufacturing microbiome strains.
Key points
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Culture conditions for probiotic bacteria were optimized for high growth yield.
•
Osmotic dehydration improved bacterial survival after manufacturing and shelf storage.
•
Reduction in intracellular free water content is crucial for intact survival.
Publisher
Springer Berlin Heidelberg,Springer,Springer Nature B.V
