FURTHER ANALYSIS OF THE IN VITRO PHYTOCHROME MEDIATION OF THE AMOUNT OF GIBBERELLIN-LIKE SUBSTANCES IN ETIOPLAST-ENRICHED SUSPENSIONS ISOLATED FROM HORDEUM VULGARE L. LEAVES

Authors

  • JANET R. HILTON

    1. Department of Physiology and Environmental Studies, University of Nottingham, School of Agriculture, Sutton Bonington, Loughborough, Leicestershire LEI 2 5RD UK
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      Present address and address for communication: Agricultural Research Council, Weed Research Organization, Begbroke Hill, Yarnton, Oxford OX5 1PF, UK.


Summary

Gibberellin-like substances were extracted from light-treated etioplasts to test the hypothesis that phytochrome controls their efflux. Results obtained using sucrose density centrifugation showed that phytochrome mediates a change in the extractability of gibberellins and does not mediate changes in the permeability of the etioplast envelope membrane with respect to gibberellins, as previously proposed.

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