Bactericidal Effects of Pulsed-Light Treatment Against <i>Burkholderia gladioli</i> pv. <i>cocovenenans</i> in <i>Auricularia</i>: Mechanisms and Influences
<i>Auricularia</i> (wood ear fungus) is susceptible to <i>Burkholderia gladioli</i> pv. <i>cocovenenans</i> (BGC) and causes food poisoning. This study investigated pulsed-light (PL) inactivation of BGC on <i>Auricularia</i>. The evaluation of PL param...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-06-01
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| Series: | Foods |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-8158/14/13/2246 |
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| Summary: | <i>Auricularia</i> (wood ear fungus) is susceptible to <i>Burkholderia gladioli</i> pv. <i>cocovenenans</i> (BGC) and causes food poisoning. This study investigated pulsed-light (PL) inactivation of BGC on <i>Auricularia</i>. The evaluation of PL parameters indicated that lower initial biomass, shorter distance, and more fluences were more effective in inactivating BGC. This study achieved 5~8 Log reductions in BGC in phosphate-buffered saline and ~4 Log reductions in <i>Auricularia auricula</i> and <i>Auricularia cornea</i> var. Li, and the survivor curves fit the Weibull model well with R<sup>2</sup> values of 0.943~0.987 and RMSE values of 0.308~0.430 in all three substrates. PL caused cell membrane damage, leading to DNA, protein, and ATP leakage and increased ROS production. PL caused an alteration in color (ΔE 3.01~7.67) but not springiness and cohesiveness in the texture of <i>Auricularia</i> at 11.80~35.40 J/cm<sup>2</sup>. In all, PL is effective in inactivating BGC on the surface of <i>Auricularia</i> at 35.40 J/cm<sup>2</sup> and can be taken as a good controlling measure. |
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| ISSN: | 2304-8158 |