Role of oxygenases in pisatin biosynthesis and in the fungal degradation of maackiain.

@article{Matthews1987RoleOO,
  title={Role of oxygenases in pisatin biosynthesis and in the fungal degradation of maackiain.},
  author={Dwight E Matthews and E. Judith Weiner and Philippa Matthews and Hans D Vanetten},
  journal={Plant physiology},
  year={1987},
  volume={83 2},
  pages={365-70}
}
Some isolates of the plant pathogen Nectria haematococca detoxify the isoflavonoid phytoalexin (-)maackiain by hydroxylation at carbon 6a. Precursor feeding studies strongly suggest that the penultimate step in (+)pisatin biosynthesis by Pisum sativum is 6a-hydroxylation of (+)maackiain. We have used (18)O labeling to test the involvement of oxygenases in these two reactions. When fungal metabolism of maackiain took place under (18)O(2), the product was labeled with 99% efficiency; no label was… CONTINUE READING

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