PLANT PHYSIOLOGY , Vol 104, Issue 1 277-280, Copyright © 1994 by American Society of Plant Biologists
Decapitation Reduces the Metabolism of Gibberellin A20 to A1 in Pisum sativum L., Decreasing the Le/le Difference
L. J. Sherriff, M. J. McKay, J. J. Ross, J. B. Reid and C. L. Willis
Department of Plant Science, University of Tasmania, Hobart, Tasmania 7001, Australia (L.J.S., M.J.M., J.J.R., J.B.R.)
When the metabolism of [13C,3H]gibberellin (GA)20 in Pisum sativum L. was
investigated using decapitated plants and stem sections, no evidence was
obtained for the recently postulated inhibitor of GA20 3[beta]-hydroxylase
(V.A. Smith [1992] Plant Physiol 99: 372-377). Instead, the results are
consistent with the hypothesis that the mutation le reduces GA1 production
by altering the structure or level of the 3[beta]-hydroxylase.
