Ellagitannins have Greater Oxidative Activities than Condensed Tannins and Galloyl Glucoses at High pH: Potential Impact on Caterpillars

@article{Barbehenn2006EllagitanninsHG,
  title={Ellagitannins have Greater Oxidative Activities than Condensed Tannins and Galloyl Glucoses at High pH: Potential Impact on Caterpillars},
  author={Raymond V Barbehenn and Christopher P. Jones and Ann E Hagerman and Maarit Karonen and J W Salminen},
  journal={Journal of Chemical Ecology},
  year={2006},
  volume={32},
  pages={2253-2267}
}
Plants synthesize a diversity of tannin structures but little is known about whether these different types have different oxidative activities in herbivores. Oxidative activities of hydrolyzable and condensed tannins were compared at pH 10 with two methods: EPR spectrometry was used to quantify semiquinone radicals in anoxic conditions and a spectrophotometric assay was used to measure the rate of browning of phenolics oxidized in ambient oxygen conditions. A little-studied group of… CONTINUE READING

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