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10 results for “condensed tannins”
The effects of condensed tannins on behaviour and performance of a specialist aphid on Aspen
<p>Data and Rscripts used to generate the results in Díez Rodríguez, Kloth and Albrectsen: The effects of condensed tannins on behaviour and performance of a specialist aphid on Aspen.</p>
Data for: Phytochemical shift from condensed tannins to flavonoids in transgenic Betula pendula decreases consumption and growth but improves growth efficiency of Epirrita autumnata larvae
<p>Despite active research, antiherbivore activity of specific plant phenolics remains largely unresolved. We constructed silver birch (<em>Betula pendula</em>) lines with modified phenolic metabolism to study the effects of foliar flavonoids and condensed tannins on consumption and growth of larvae of a generalist herbivore, the autumnal moth (<em>Epirrita autumnata</em>). We conducted a feeding experiment using birch lines in which expression of dihydroflavonol reductase (<em>DFR</em>), anthocyanidin synthase (<em>ANS</em>) or anthocyanidin reductase (<em>ANR</em>) had been decreased by RNA interference. Modification-specific effects on plant phenolics, nutrients and phenotype, and on larval consumption and growth were analyzed using uni- and multivariate methods. Inhibiting <em>DFR</em> expression increased the concentration of flavonoids at the expense of condensed tannins, and silencing <em>DFR </em>and <em>ANR </em>decreased leaf and plant size. <em>E. autumnata </em>larvae consumed on average 82% less of DFRi plants than of unmodified controls, suggesting that flavonoids or glandular trichomes deter larval feeding. However, larval growth efficiency was highest on low-tannin DFRi plants, indicating that condensed tannins (or their monomers) are physiologically more harmful than non-tannin flavonoids for <em>E. autumnata </em>larvae. Our results show that genetic manipulation of the flavonoid pathway in plants can effectively be used to produce altered phenolic profiles required for elucidating the roles of low-molecular weight phenolics and condensed tannins in plant–herbivore relationships, and suggest that phenolic secondary metabolites participate in regulation of plant growth.</p>
Data for: Fabrication and characterization of antibacterial coatings using an amphoteric condensed tannin,Tanfloc
<p>This dataset presents comprehensive information on the development and characterization of antibacterial polyelectrolyte multilayer (PEM) coatings incorporating tanfloc, a plant-derived condensed tannin polymer with inherent antimicrobial properties. The dataset encompasses experimental data related to the fabrication of PEMs using tanfloc as either a polyanion or a polycation, expanding the versatility of this amphoteric polymer in PEM coatings. Typically, PEMs are formed by combining a polycation and a polyanion with complementary ionic groups. However, the unique amphoteric nature of tanfloc allows for the creation of PEMs utilizing only one of its functional groups, leaving the other functional group available for imparting antibacterial activity.</p> <p>The dataset includes details on the assembly of tanfloc-containing PEMs employing various counter-polyelectrolytes, including three poly-anionic glycosaminoglycans with varying charge densities, as well as the polycations N,N,N-trimethyl chitosan and polyethylenimine. The layer-by-layer assembly of PEMs is monitored using in situ Fourier-transform surface plasmon resonance (FT-SPR), confirming stable layer-by-layer construction. Surface chemistry is assessed through X-ray photoelectron spectroscopy (XPS).</p> <p>Furthermore, this dataset provides insights into the biocompatibility of tanfloc-containing PEMs, demonstrating their support for mammalian cells. Most notably, the dataset includes extensive data on the antiadhesive and antibacterial properties of these coatings against common implant-associated pathogens, such as <em>Staphylococcus aureus</em> and <em>Pseudomonas aeruginosa</em>. The antibacterial effects observed are attributed to electrostatic interactions and the polyphenolic nature of tanfloc.</p>
Concentrations of total phenolics and condensed tannins and the number of galls combined in each sample
<p>Gall-forming insects induce various types of galls on their host plants by altering gene expression in host plant organs, and recent studies have been conducted for gene expression in galls. However, the evolutionary trajectories of gene expression patterns and the resulting phenotypes have not yet been studied using multiple related species. We investigated the speciation and the diversification process of galls induced by four closely-related aphid species (Hormaphidini) on a host plant species (<em>Hamamelis japonica</em>) by examining the phylogenetic congruence between the geographic divergences of aphids and the host plant, and by comparing their gene expression patterns and resulting phenotypes. Phylogenetic analysis of aphids and the host plant showed that geographic isolation among host plant populations has interrupted gene flow in aphids and accelerated the speciation process. The concentration of phenolics and the complexity of the internal structure of galls were correlated with the expression levels of genes for the biosynthesis of phenolics and morphogenesis, respectively. These results suggest that the expression levels of genes for the biosynthesis of phenolics and morphogenesis have evolutionarily increased in galls accelerated by the speciation process of aphids due to the distribution change of the host plant, leading to the related phenotypic evolution. Our study showed the evolutionary process of phenotypic traits in galls in the wild from both gene expression and actual phenotype levels.</p>
Environment and genotype influence on Populus tremuloides condensed tannin composition
<p>This dataset contains concentration and molecular structural information (mean degree of polymerization, procyanidin:prodelphinidin ratios, stereochemistry) describing condensed tannins in <em>Populus tremuloides</em> (aspen) tree foliage in different genotypes and in response to altered environmental conditions (warming, freeze damage, ozone exposure, elevated carbon dioxide, elevated soil nutrients, altered soil microbiome, mammal browsing, and insect herbivory).</p>
Data for: Phytochemical shift from condensed tannins to flavonoids in transgenic Betula pendula decreases consumption and growth but improves growth efficiency of Epirrita autumnata larvae
Open the record for dataset details and reuse information.
Concentrations of total phenolics and condensed tannins and the number of galls combined in each sample
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Data for: Fabrication and characterization of antibacterial coatings using an amphoteric condensed tannin,Tanfloc
Open the record for dataset details and reuse information.
Environment and genotype influence on Populus tremuloides condensed tannin composition
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Multiple Daily Condensed Tannin Supplementation and Iron Bioavailability: The Tannin Dose Response Trial
ClinicalTrials.gov study NCT03030716. IPD Sharing: NO. Countries: 1. Publications: 0.
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