Effects of Minerals on Resistance of Bacillus subtilis Spores to Heat and Hydrostatic Pressure

AUTOR(ES)

Igura, Noriyuki

FONTE

American Society for Microbiology

RESUMO

Among Bacillus subtilis IFO13722 spores sporulated at 30, 37, and 44°C, those sporulated at 30°C had the highest resistance to treatments with high hydrostatic pressure (100 to 300 MPa, 55°C, 30 min). Pressure resistance increased after demineralization of the spores and decreased after remineralization of the spores with Ca2+ or Mg2+, whereas the resistance did not change when spores were remineralized with Mn2+ or K+, suggesting that former two divalent ions were involved in the activation of cortex-lytic enzymes during germination.

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