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Influence of gibberellin biosynthesis inhibitors on stem elongation and floral initiation on in vitro chicory root explants under dark and light conditions

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Abstract

Root explants of chicory (Cichorium intybus L.) were cultured in vitro under continuous light or darkness. On a standard medium (no plant growth regulators added), flowering-stems were initiated under continuous light while under continuous dark, vegetative-stems were formed. Different types of GA (gibberellin) biosynthesis inhibitors were added to the culture medium. Paclobutrazol and compounds belonging to the group of cyclohexanetriones clearly reduced flowering-stem growth under light conditions and vegetative-stem growth under dark conditions. Under light conditions, flower bud initiation was not affected. These and other results suggest that GA1 may be synthesized during the in vitro culture period and that it controls flowering-stem growth but not floral initiation.

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Abbreviations

CCC:

chlormequat chloride

GA:

gibberellin

LAB 198 999:

3,5-dioxo-4-butyryl-cyclohexane carboxylic acid ethyl ester

BAS 111..W:

1-phenoxy-3-(1H-1,2,4-triazol-1-yl)-4-hydroxy-5,5-dimethylhexane

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Authors and Affiliations

  1. Faculty of Agricultural and Applied Biological Sciences, Katholieke Universiteit Leuven, Willem de Croylaan 42, B-3001, Heverlee, Belgium

    M. A. C. Demeulemeester, A. Van de Mierop & M. P. De Proft

  2. BASF Agricultural Research Station, D-67117, Limburgerhof, Germany

    W. Rademacher

Authors
  1. M. A. C. Demeulemeester
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  2. W. Rademacher
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  3. A. Van de Mierop
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  4. M. P. De Proft
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Demeulemeester, M.A.C., Rademacher, W., Van de Mierop, A. et al. Influence of gibberellin biosynthesis inhibitors on stem elongation and floral initiation on in vitro chicory root explants under dark and light conditions. Plant Growth Regul 17, 47–52 (1995). https://doi.org/10.1007/BF00024494

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  • DOI: https://doi.org/10.1007/BF00024494

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