, Volume 109, Issue 4, pp 357–361 | Cite as

Interconversion of gibberellin A4 to gibberellins A1 and A34 by dwarf rice, cultivar Tan-ginbozu

  • Richard C. Durley
  • Richard P. Pharis
Short Communication


Interconversion of GA4 to GA1 and GA34 occurred within 24 h of application of 1,2-[3H]-GA4 to seedlings of dwarf rice, cv. Tan-ginbozu. Identification was made by direct comparison of the trimethylsilyl ether derivatives of the methyl esters of Silica-gel partition-column fractions on gas-liquid radiochromatography with derivatized GA1 and GA34 standards on three columns: 2% QF-1, 2% SE-30, and 1% XE-60. GA2, an artifact of the purification and chromatography system, may also be formed by the plant. The conversions from GA4 to GA1 and GA34 are single hydroxylations. At least two unidentified radioactive products were also formed by the plant. Interconversions were in the order of 0.3 to 0.8% of applied [3H]-GA4.


Methyl Ether Ester Chromatography Purification 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.





gas-liquid chromatography


gasliquid radiochromatography


trimethylsilyl ether of methyl ester


thin-layer chromatography


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Copyright information

© Springer-Verlag 1973

Authors and Affiliations

  • Richard C. Durley
    • 1
  • Richard P. Pharis
    • 1
  1. 1.Department of BiologyUniversity of CalgaryCalgaryCanada

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