ISHS Acta Horticulturae 424: II International Rose Symposium
INFLUENCE OF NITROGEN SUPPLY ON ABA LEVELS AND FLOWER SENESCENCE IN ROSA HYBRIDA CV ROYALTY |
| Authors: | C. Ménard, B. Dansereau, G. Garello, M.Th. Le Page-Degivry |
| Abstract:
The longevity of cut rose flowers was greater when plants were previously grown on a medium supplemented with low nitrogen level than when nitrogen supply was high. During high N preharvest culture, an increase in ABA level was induced both in leaves and petals. As previously reported for roses of different genetic origin (Mayak et al. 1972) or for roses grown under different light qualities (Garello et al. 1994), the higher the ABA level at harvest, the shorter the vase-life observed. This behaviour could be understood when ABA levels were analysed along with vase-life: the earlier the ABA level increased, the shorter was the vase-life observed. All these observations converged to suggest that ABA played a role in the transduction chain between cultural conditions and flower senescence | |
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