ISHS Acta Horticulturae 261: IV International Symposium on Postharvest Physiology of Ornamental Plants
BULB-TYPE FLOWER SENESCENCE |
| Authors: | Tim A. Lukaszewski, M. S. Reid |
| DOI: | 10.17660/ActaHortic.1989.261.6 |
| Abstract:
In order to study the senescence of flowers of geophytes, many of which are important commercial cut flowers but last poorly in the vase, we chose day lilies as a model system, the flowers of daylilies (Hemerocallis species). The rapid senescence of these flowers was accompanied by a transient respiratory climacteric but not by any appreciable evolution of ethylene. Since the application of silver thiosulfate (STS), an inhibitor of ethylene action, or of aminooxyacetic acid (AOA), an inhibitor of ethylene biosynthesis, did not delay senescence of daylilies, we conclude that ethylene is not involved in this process. Daylilies treated with cycloheximide, an inhibitor of protein synthesis on 60-S ribosomes, lasted as long as six days in the vase. The implications of these findings to our understanding of bulb-type senescence are discussed. | |
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