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EPTC Induced Modification of Gibberellin Biosynthesis

Published online by Cambridge University Press:  12 June 2017

R. E. Wilkinson  and
D. Ashley
R. E. Wilkinson
Affiliation:
Dep. Agron., Univ. of Georgia, Georgia Station, Experiment, GA 30212 and Athens, GA 30602
D. Ashley
Affiliation:
Dep. Agron., Univ. of Georgia, Georgia Station, Experiment, GA 30212 and Athens, GA 30602
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Abstract

Wheat (Triticum aestivum L. ‘Holley’) was grown for 14 days in 0.5 strength Hoagland and Arnon's complete mineral nutrient solution containing 0. 15.6, 31.25, 62.5, 125.0, or 250.0 ppbw EPTC (S-ethyl dipropylthiocarbamate). Gibberellic acid (GA) content, as measured by gas-liquid chromatography, was decreased 96.4% by 125.0 ppbw EPTC. When 0.05 μCi mevalonic acid-2-14C-(MVA-2-14C) (DBED salt) (0.15 mCi/mg MVA) was added to the nutrient solution, incorporation of MVA-2-14C into total kaurenoids was decreased 90% by 250 ppbw EPTC. Metabolism of kaurene was reduced by 250 ppbw EPTC with resultant 3-fold accumulations of kaurene.

Keywords

Kaurenekaurene synthetasekaurene oxidase
Type
Research Article
Information
Weed Science , Volume 27 , Issue 3 , May 1979 , pp. 270 - 274
Copyright
Copyright © 1979 by the Weed Science Society of America 

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