Characterization of Lactobacillus collinoides response to heat, acid and ethanol treatments |
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| Authors: | J M Laplace N Sauvageot A Hartke Y Auffray |
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| Institution: | (1) Laboratoire de Microbiologie de l'Environnement, IRBA, Université de Caen, 14032 Caen cedex, France e-mail: laplace@ibba.unicaen.fr Tel.: +(33)-231-56-56-61 Fax: +(33)-231-56-5311, FR |
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| Abstract: | Tolerance to stress and cross-protection in Lactobacillus collinoides were examined after exposure to ethanol, acid or heat shock. Ethanol and heat-adapted cells demonstrate induced homologous␣tolerance
and cross-resistance to acid stress. No cross-protection of acid-adapted cells against ethanol and heat stresses was observed.
Heat was the only pretreatment leading to cross-protection against the two other stresses. Whole-cell protein extract analysis
revealed that each treatment induced a battery of stress proteins; the synthesis of some of these polypeptides being induced
by more than one condition. The greatest overlap was observed between ethanol and heat treatments. Ten proteins were found
to be common to these stresses.
Received: 7 November 1998 / Received revision: 10 February 1999 / Accepted: 12 February 1999 |
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