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The Antibacterial Activity of Chitosan Products Blended with Monoterpenes and Their Biofilms against Plant Pathogenic Bacteria.

Badawy ME, Rabea EI, Taktak NE, El-Nouby MA - Scientifica (Cairo) (2016)

Bottom Line: The antibacterial activity was evaluated in vitro by the agar dilution technique as a minimum inhibitory concentration (MIC) that was found to be dependent on the type of the microorganism tested.The most active product of chitosan was used for biofilm production enriched with geraniol and thymol (0.1 and 0.5%) and the films were also evaluated against the tested bacteria.The biological bioactivities summarized here may provide novel insights into the functions of chitosan and some monoterpenes and potentially allow their use for food protection from microbial attack.

View Article: PubMed Central - PubMed

Affiliation: Department of Pesticide Chemistry and Technology, Faculty of Agriculture, Alexandria University, El-Shatby, Alexandria 21545, Egypt.

ABSTRACT
This study focuses on the biological activities of eleven chitosan products with a viscosity-average molecular weight ranging from 22 to 846 kDa in combination with the most active monoterpenes (geraniol and thymol), out of 10 tested, against four plant pathogenic bacteria, Agrobacterium tumefaciens, Erwinia carotovora, Corynebacterium fascians, and Pseudomonas solanacearum. The antibacterial activity was evaluated in vitro by the agar dilution technique as a minimum inhibitory concentration (MIC) that was found to be dependent on the type of the microorganism tested. The most active product of chitosan was used for biofilm production enriched with geraniol and thymol (0.1 and 0.5%) and the films were also evaluated against the tested bacteria. The biological bioactivities summarized here may provide novel insights into the functions of chitosan and some monoterpenes and potentially allow their use for food protection from microbial attack.

No MeSH data available.


Related in: MedlinePlus

The in vitro inhibition of A. tumefaciens, C. fascians, E. carotovora, and P. solanacearum with chitosan films enriched with 0.1 and 0.5% geraniol or thymol by NB spectrophotometric technique. Inhibition was calculated per 0.005 g film per each treatment. Ch: chitosan; G: geraniol; T: thymol.
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Related In: Results  -  Collection


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fig2: The in vitro inhibition of A. tumefaciens, C. fascians, E. carotovora, and P. solanacearum with chitosan films enriched with 0.1 and 0.5% geraniol or thymol by NB spectrophotometric technique. Inhibition was calculated per 0.005 g film per each treatment. Ch: chitosan; G: geraniol; T: thymol.

Mentions: Inhibition of A. tumefaciens, C. fascians, E. carotovora, and P. solanacearum in vitro with chitosan films enriched with geraniol or thymol by NB spectrophotometric technique is shown in Figure 2. Geraniol and thymol exhibited antibacterial activity against the tested bacteria and the activity is concentration-dependent. The films with 0.5% thymol showed the strongest inhibition toward all pathogens with 60.02, 73.54, 77.99, and 74.53% inhibition of bacterial growth of A. tumefaciens, C. fascians, E. carotovora, and P. solanacearum, respectively. However, Ch/starch film showed the lowest inhibition activities (15.38, 11.10, 17.51, and 21.26% for A. tumefaciens, C. fascians, E. carotovora, and P. solanacearum, resp.).


The Antibacterial Activity of Chitosan Products Blended with Monoterpenes and Their Biofilms against Plant Pathogenic Bacteria.

Badawy ME, Rabea EI, Taktak NE, El-Nouby MA - Scientifica (Cairo) (2016)

The in vitro inhibition of A. tumefaciens, C. fascians, E. carotovora, and P. solanacearum with chitosan films enriched with 0.1 and 0.5% geraniol or thymol by NB spectrophotometric technique. Inhibition was calculated per 0.005 g film per each treatment. Ch: chitosan; G: geraniol; T: thymol.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4834403&req=5

fig2: The in vitro inhibition of A. tumefaciens, C. fascians, E. carotovora, and P. solanacearum with chitosan films enriched with 0.1 and 0.5% geraniol or thymol by NB spectrophotometric technique. Inhibition was calculated per 0.005 g film per each treatment. Ch: chitosan; G: geraniol; T: thymol.
Mentions: Inhibition of A. tumefaciens, C. fascians, E. carotovora, and P. solanacearum in vitro with chitosan films enriched with geraniol or thymol by NB spectrophotometric technique is shown in Figure 2. Geraniol and thymol exhibited antibacterial activity against the tested bacteria and the activity is concentration-dependent. The films with 0.5% thymol showed the strongest inhibition toward all pathogens with 60.02, 73.54, 77.99, and 74.53% inhibition of bacterial growth of A. tumefaciens, C. fascians, E. carotovora, and P. solanacearum, respectively. However, Ch/starch film showed the lowest inhibition activities (15.38, 11.10, 17.51, and 21.26% for A. tumefaciens, C. fascians, E. carotovora, and P. solanacearum, resp.).

Bottom Line: The antibacterial activity was evaluated in vitro by the agar dilution technique as a minimum inhibitory concentration (MIC) that was found to be dependent on the type of the microorganism tested.The most active product of chitosan was used for biofilm production enriched with geraniol and thymol (0.1 and 0.5%) and the films were also evaluated against the tested bacteria.The biological bioactivities summarized here may provide novel insights into the functions of chitosan and some monoterpenes and potentially allow their use for food protection from microbial attack.

View Article: PubMed Central - PubMed

Affiliation: Department of Pesticide Chemistry and Technology, Faculty of Agriculture, Alexandria University, El-Shatby, Alexandria 21545, Egypt.

ABSTRACT
This study focuses on the biological activities of eleven chitosan products with a viscosity-average molecular weight ranging from 22 to 846 kDa in combination with the most active monoterpenes (geraniol and thymol), out of 10 tested, against four plant pathogenic bacteria, Agrobacterium tumefaciens, Erwinia carotovora, Corynebacterium fascians, and Pseudomonas solanacearum. The antibacterial activity was evaluated in vitro by the agar dilution technique as a minimum inhibitory concentration (MIC) that was found to be dependent on the type of the microorganism tested. The most active product of chitosan was used for biofilm production enriched with geraniol and thymol (0.1 and 0.5%) and the films were also evaluated against the tested bacteria. The biological bioactivities summarized here may provide novel insights into the functions of chitosan and some monoterpenes and potentially allow their use for food protection from microbial attack.

No MeSH data available.


Related in: MedlinePlus