Antimicrobial activity and chemical composition of white birch (<i>Betula papyrifera</i> Marshall) bark extracts

Blondeau, Dorian; St-Pierre, Annabelle; Bourdeau, Nathalie; Bley, Julien; Lajeunesse, André; Desgagné‐Penix, Isabel

doi:10.1002/mbo3.944

Cited by 33 publications

(30 citation statements)

References 93 publications

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“…Non-polar phenolic compounds and flavonoids are believed to be responsible for antimicrobial activity [ 41 , 45 ]. Bordeoux et al [ 46 ] has shown a strong antimicrobial effect of acid-base extracts, specific for alkaloids obtained using chloroform or hexane. According to Kedzia et al [ 47 ] the complex mechanism of antimicrobial action can be attributed to the synergism between flavonoids, hydroxy acids and sesquiterpenes [ 47 ].…”

Section: Resultsmentioning

confidence: 99%

“…PEG was introduced into the solutions to prepare plasticised PLA films. To obtain PLA-based materials, 50 mL of the prepared mixture was poured onto glass Petri dishes (14.5 cm in diameter) and left for 3 days to form a polymer film [ 10 , 11 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ]. The thickness of films was measured using an electronic thickness gauge (type 0.001/0–12.7 mm, Poland).…”

Section: Methodsmentioning

confidence: 99%

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The Role of Birch Tar in Changing the Physicochemical and Biocidal Properties of Polylactide-Based Films

Richert

Olewnik-Kruszkowska

Dąbrowska

et al. 2021

IJMS

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The objective of this study was to produce bactericidal polymer films containing birch tar (BT). The produced polymer films contain PLA, plasticiser PEG (5% wt.) and birch tar (1, 5 and 10% wt.). Compared to plasticised PLA, films with BT were characterised by reduced elongation at break and reduced water vapour permeability, which was the lowest in the case of film with 10% wt. BT content. Changes in the morphology of the produced materials were observed by performing scanning electron microscopy (SEM) and atomic force microscopy (AFM) analysis; the addition of BT caused the surface of the film to be non-uniform and to contain recesses. FTIR analysis of plasticised PLA/BT films showed that the addition of birch tar did not change the crystallinity of the obtained materials. According to ISO 22196: 2011, the PLA film with 10% wt. BT content showed the highest antibacterial effect against the plant pathogens A. tumefaciens, X. campestris, P. brassicacearum, P. corrugata, P. syringae. It was found that the introduction of birch tar to plasticised PLA leads to a material with biocidal effect and favourable physicochemical and structural properties, which classifies this material for agricultural and horticultural applications.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

The Role of Birch Tar in Changing the Physicochemical and Biocidal Properties of Polylactide-Based Films

Richert

Olewnik-Kruszkowska

Dąbrowska

et al. 2021

IJMS

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“…While higher sugar availability in the Fagales phyllosphere is suggested by the abundance of bacterial functions linked with metabolism and transport of carbohydrates, these bacteria also possessed traits related to xenobiotics degradation that might be important for dealing with plant defence traits characteristic of Fagales species, such as phenolic compounds (Blondeau et al, 2020;Kumar et al, 2014). The role for leaf chemical gradients in determining bacterial functions in the phyllosphere was also reported for shrubs and herbaceous plants of the Mediterranean (Yadav et al, 2008).…”

Section: Adaptive Explanations Of Evolutionary Associations Between Phyllosphere Bacteria and Their Hostsmentioning

confidence: 86%

Plant‐bacteria associations are phylogenetically structured in the phyllosphere

Lajoie

Kembel

2021

Molecular Ecology

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A pressing preoccupation for scientists worldwide is to understand the potential outcomes of species range shifts due to anthropogenic disturbances and global warming (e.g., Gómez-Ruiz & Lacher, 2019;Schleuning et al., 2020). Reshuffling of species ranges are leading to new interactions among species, with potentially important consequences for their fitness and survival (e.g., Brambilla et al., 2020;Klanderud, 2005). Understanding range shifts has become particularly critical for microorganisms interacting with plants and animals, given the importance of microbiota for the health of humans and the ecosystems they depend on (e.g., Kerdraon et al., 2019;Sommer &

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“…Betulin, a naturally occurring triterpene, is usually obtained from the Betula L. birch bark [ 49 ]. The content of betulin and lupeol in the outer bark varies from 10% to 40% depending on the type of birch, its place and conditions of its growth, the age of the tree, and the season [ 50 , 51 ].…”

Section: Methodsmentioning

confidence: 99%

Microscopic and Structural Studies of an Antimicrobial Polymer Film Modified with a Natural Filler Based on Triterpenoids

et al. 2022

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The aspects of component visualization of the antimicrobial triterpenoids (betulin) additive, both on the surface and in the bulk of the polymer, constituting food film packaging, are considered. This paper presents new knowledge about the morphology and surface structure of modified films using three independent methodological approaches: optical microscopy; a histological method adapted to packaging materials; and a method of attenuated total internal reflection (ATR) spectroscopy in the infrared region with Fourier transform. The use of these methods shows the betulin granules, individual or forming chains. To visualize the antimicrobial additive in the polymer bulk, a modified histological method adapted for film materials and attenuated total internal reflection (ATR) spectroscopy in the infrared region were used with Fourier transform using a Lumos Bruker microscope (Germany) (ATR crystal based on germanium). Sample sections were analyzed using Leica 818 blades at an angle of 45 degrees. The histological method consists of the study of a biological object thin section, in the transmitted light of a microscope, stained with contrast dyes to reveal its structures, and placed on a glass slide. In the method modified for the present study, instead of a biological one, a synthetic object was used, namely the developed film materials with the addition of natural organic origin. Individual granules are about 2 µm long; chains can be up to 10 µm long. The thickness of the granules ranged from 1 to 1.5 microns. It can be seen that the depth distribution of granules in the film from the inner surface to the outer one is rather uniform. Spectroscopic studies using the method of automatic ATR mapping in the region of 880 cm−1 made it possible to evaluate the distribution of an antimicrobial additive based on triterpenoids on the surface and in the polymer bulk.

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Antimicrobial activity and chemical composition of white birch (Betula papyrifera Marshall) bark extracts

Cited by 33 publications

References 93 publications

The Role of Birch Tar in Changing the Physicochemical and Biocidal Properties of Polylactide-Based Films

The Role of Birch Tar in Changing the Physicochemical and Biocidal Properties of Polylactide-Based Films

Plant‐bacteria associations are phylogenetically structured in the phyllosphere

Microscopic and Structural Studies of an Antimicrobial Polymer Film Modified with a Natural Filler Based on Triterpenoids

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