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Role of fatty acids in Bacillus environmental adaptation.

Diomandé SE, Nguyen-The C, Guinebretière MH, Broussolle V, Brillard J - Front Microbiol (2015)

Bottom Line: Some elements of the FA pattern composition are common to Bacillus species, whereas others are specific and can be categorized in relation to the ecological niches of the species.Bacillus species are able to modify their FA patterns to adapt to a wide range of environmental changes, including changes in the growth medium, temperature, food processing conditions, and pH.Like endogenous FAs, exogenous FAs may positively or negatively affect the survival of Bacillus vegetative cells and the spore germination ability in a given environment.

View Article: PubMed Central - PubMed

Affiliation: INRA, UMR408 Sécurité et Qualité des Produits d'Origine Végétale Avignon, France ; Université d'Avignon, UMR408 Sécurité et Qualité des Produits d'Origine Végétale Avignon, France.

ABSTRACT
The large bacterial genus Bacillus is widely distributed in the environment and is able to colonize highly diverse niches. Some Bacillus species harbor pathogenic characteristics. The fatty acid (FA) composition is among the essential criteria used to define Bacillus species. Some elements of the FA pattern composition are common to Bacillus species, whereas others are specific and can be categorized in relation to the ecological niches of the species. Bacillus species are able to modify their FA patterns to adapt to a wide range of environmental changes, including changes in the growth medium, temperature, food processing conditions, and pH. Like many other Gram-positive bacteria, Bacillus strains display a well-defined FA synthesis II system that is equilibrated with a FA degradation pathway and regulated to efficiently respond to the needs of the cell. Like endogenous FAs, exogenous FAs may positively or negatively affect the survival of Bacillus vegetative cells and the spore germination ability in a given environment. Some of these exogenous FAs may provide a powerful strategy for preserving food against contamination by the Bacillus pathogenic strains responsible for foodborne illness.

No MeSH data available.


Related in: MedlinePlus

General changes in FA composition observed with variations in temperature or O2 availability. Increase (blue) or decrease (pink) of the type of varying FA in the condition considered.
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Figure 6: General changes in FA composition observed with variations in temperature or O2 availability. Increase (blue) or decrease (pink) of the type of varying FA in the condition considered.

Mentions: In conclusion, the main changes observed in the FA composition of the genus Bacillus at low and high temperatures are presented in Figure 6. For low temperature adaptation, anteiso-, unsaturated FAs and i13 proportions increased, while iso-, saturated FAs and i15 proportions decreased. In contrast, the proportion of saturated FAs increased, and the proportions of anteiso and unsaturated FAs decreased at high temperature. The respective importance of these mechanisms may change with the species considered and the growth conditions.


Role of fatty acids in Bacillus environmental adaptation.

Diomandé SE, Nguyen-The C, Guinebretière MH, Broussolle V, Brillard J - Front Microbiol (2015)

General changes in FA composition observed with variations in temperature or O2 availability. Increase (blue) or decrease (pink) of the type of varying FA in the condition considered.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4525379&req=5

Figure 6: General changes in FA composition observed with variations in temperature or O2 availability. Increase (blue) or decrease (pink) of the type of varying FA in the condition considered.
Mentions: In conclusion, the main changes observed in the FA composition of the genus Bacillus at low and high temperatures are presented in Figure 6. For low temperature adaptation, anteiso-, unsaturated FAs and i13 proportions increased, while iso-, saturated FAs and i15 proportions decreased. In contrast, the proportion of saturated FAs increased, and the proportions of anteiso and unsaturated FAs decreased at high temperature. The respective importance of these mechanisms may change with the species considered and the growth conditions.

Bottom Line: Some elements of the FA pattern composition are common to Bacillus species, whereas others are specific and can be categorized in relation to the ecological niches of the species.Bacillus species are able to modify their FA patterns to adapt to a wide range of environmental changes, including changes in the growth medium, temperature, food processing conditions, and pH.Like endogenous FAs, exogenous FAs may positively or negatively affect the survival of Bacillus vegetative cells and the spore germination ability in a given environment.

View Article: PubMed Central - PubMed

Affiliation: INRA, UMR408 Sécurité et Qualité des Produits d'Origine Végétale Avignon, France ; Université d'Avignon, UMR408 Sécurité et Qualité des Produits d'Origine Végétale Avignon, France.

ABSTRACT
The large bacterial genus Bacillus is widely distributed in the environment and is able to colonize highly diverse niches. Some Bacillus species harbor pathogenic characteristics. The fatty acid (FA) composition is among the essential criteria used to define Bacillus species. Some elements of the FA pattern composition are common to Bacillus species, whereas others are specific and can be categorized in relation to the ecological niches of the species. Bacillus species are able to modify their FA patterns to adapt to a wide range of environmental changes, including changes in the growth medium, temperature, food processing conditions, and pH. Like many other Gram-positive bacteria, Bacillus strains display a well-defined FA synthesis II system that is equilibrated with a FA degradation pathway and regulated to efficiently respond to the needs of the cell. Like endogenous FAs, exogenous FAs may positively or negatively affect the survival of Bacillus vegetative cells and the spore germination ability in a given environment. Some of these exogenous FAs may provide a powerful strategy for preserving food against contamination by the Bacillus pathogenic strains responsible for foodborne illness.

No MeSH data available.


Related in: MedlinePlus