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Plant Growth Regulation

, Volume 25, Issue 3, pp 181–185 | Cite as

Influence of light on natural indigo production from woad (Isatis tinctoria)

  • Kerry G. Stoker
  • David T. Cooke
  • David J. Hill
Article

Abstract

In woad (Isatis tinctoria), field observations indicated, that after periods of dry sunny weather, indigo yields increased significantly, suggesting that light intensity and quality affected indigo precursor production. Therefore, woad was grown under different light intensities and in the presence or absence of supplementary UV light. In general, plants supplied with more light produced more indigo than those given lesser light. When plants under greater light regimes were transferred to lesser light conditions, then indigo production declined. The opposite was also true, indicating that greater indigo production can be obtained from plants harvested after periods of increased sunlight.

environment indigo Isatis tinctoria light photosynthetically active radiation secondary metabolism UV-B radiation woad 

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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Kerry G. Stoker
    • 1
  • David T. Cooke
    • 1
  • David J. Hill
    • 1
  1. 1.Department of Biological SciencesUniversity of BristolBristol

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