Use of an Acylcyclohexanedione Growth Retardant, LAB 198 999, to Determine Whether Gibberellin A20 Has Biological Activity per se in Dark-Grown Dwarf (le5839) Seedlings of Pisum sativum
Open Access
- 1 October 1992
- journal article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 100 (2) , 651-654
- https://doi.org/10.1104/pp.100.2.651
Abstract
Dwarf (le5839) seedlings of Pisum sativum respond to gibberellin A20 (GA20) in the dark, although the same dosage of GA20 applied to light-grown le5839 seedlings elicits no growth response. The acylcyclohexanedione growth retardant, LAB 198 999, which is known to inhibit gibberellin oxidation and in particular 3β-hydroxylation such as the conversion of GA20 to GA1, also inhibits the growth response of dark-grown dwarf (le5839) seedlings to GA20. Thus, the biological activity of GA20 in the dark appears to be a consequence of its conversion to GA1, even though it is known from studies with light-grown seedlings that the le mutation reduces the conversion of GA20 to GA1.Keywords
This publication has 5 references indexed in Scilit:
- Evidence for Phytochrome Regulation of Gibberellin A20 3β-Hydroxylation in Shoots of Dwarf (lele) Pisum sativum L.Plant Physiology, 1986
- Internode Length in PisumPlant Physiology, 1983
- Gibberellins and Light Inhibition of Stem Growth in PeasPlant Physiology, 1964
- Growth Responses of Alaska Pea Seedlings to Visible Radiation and Gibberellic Acid.Plant Physiology, 1959
- Studies on the Mechanism of Stem Growth Inhibition by Visible Radiation.Plant Physiology, 1959