Dussault, Dominic; Caillet, Stéphane; Le Tien, Canh et Lacroix, Monique 
ORCID: https://orcid.org/0000-0002-2042-4033
(2008).
Carotenoids' influence on radiotolerance of Pantoea agglomerans, a plant pathogen
Letters in Applied Microbiology
, vol. 47
, nº 3.
pp. 208-213.
DOI: 10.1111/j.1472-765X.2008.02410.x.
Résumé
Aim: The aim of this study was to evaluate the effect of gamma radiation on the carotenoid content of two strains of the Enterobacteriaceae: Pantoea agglomerans. Methods and Results: Pantoea agglomerans strains ATCC 49174 and RL1 were used for this study. Successive radiation treatments were performed to study the radiotolerance. Total carotenoids were obtained by multiple extraction using chloroform/methanol (2 : 1), quantified by measuring the optical density at 453 nm and their antioxidant activity measured by a colorimetric method. The D-10 studies were conducted using a UC-15A irradiator loaded with Co-60. Bacterial counts from various dilutions were carried out after irradiation. Strain ATCC 49174 irradiated at 1 kGy produced 4.3 times more carotenoids than the control, whereas carotenoid synthesis increased by 2.9-fold in the strain RL1. However, there was no significant difference in the D-10 values. Conclusion: Carotenoid increased production is influenced by gamma radiation but does not modify the tolerance to radiations. Significance and Impact of the Study: To our knowledge, this is the first study to demonstrate the effects of gamma radiation on carotenoid production levels.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | - |
| Centre: | Centre INRS-Institut Armand Frappier |
| Date de dépôt: | 21 juill. 2024 19:13 |
| Dernière modification: | 21 juill. 2024 19:13 |
| URI: | https://espace.inrs.ca/id/eprint/14642 |
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