DOES DIURNAL TEMPERATURE FLUCTUATIONS (DIF) REGULATE INTERNODE LENGTHS MEDIATED THROUGH THE BIOSYNTHETIC FORMATION OF GA1 IN BEGONIA X HIEMALIS FOTCH?
Mean internode elongation shows a typical DIF response, where the difference of the means between positive DIF and zero DIF is greater than the difference between zero DIF and negative DIF. Plants treated with the combination of GA1 and BX-112 and the GA1 treated had the greatest internode elongation compared to the control at the same temperature. There seems to be no effect of the other treatments with ent-kaurene, kaurenoic acid, GA12, GA19, GA20 and BX-112. The internode elongation on plants treated with the combination of GA1 and BX-112 seems to be a bit greater than GA1 treated plants, and this supports the hypothesis that BX-112 inhibits the turnover from GA1 to GA8. The possibility that there might be another important pathway for the biosynthetic formation of GA1 in B. x hiemalis are discussed.
DOI: 10.17660/ActaHortic.1995.378.16
https://doi.org/10.17660/ActaHortic.1995.378.16