ISHS Acta Horticulturae 424: II International Rose Symposium
IMPACT OF CULTURE CONDITIONS ON SUBSEQUENT CUT FLOWER LONGEVITY IN 3 CULTIVARS OF ROSES: INVOLVEMENT OF ABA. |
| Authors: | G. Garello, M.Th. Le Page-Degivry, C. Ménard, B. Dansereau |
| Abstract:
The senescence of cut roses from three cultivars (Royalty, Obsession and After-Glow) was more delayed when rose plants were previously grown under high pressure sodium (HPS) lamps than under metal halide (MH) lamps. Moreover culture in the presence of low nitrogen (low N) supply induced a later senescence than high nitrogen (high N) culture. The analysis of rose petals clearly highlighted that ABA levels were modified by growing conditions. They were significantly higher when rose plants were grown under MH than under HPS lamps. Moreover a twofold increase in nitrogen supply led to their significant increase. These results confirmed the role played by ABA in flower senescence. | |
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