ISHS Acta Horticulturae 405: VI International Symposium on Postharvest Physiology of Ornamental Plants
ENHANCED ETHYLENE SYNTHESIS IN COLD STORED CARNATION FLOWERS |
| Authors: | M. Serrano, M.C. Martinez-Madrid, F. Riquelme, F. Romojaro |
| Keywords: | ACC, carnation, cold storage, ACC oxidase, ethylene, MACC, senescence |
| Abstract:
Storage of carnations at 4°C results in the accumulation of N-malonyl-1- aminocyclopropane-1-carboxylic acid (MACC) in the petals and a concomitant increase in the activity of ACC oxidase. The senescence of carnations following removal from cold storage (for 5, 7 or 9 weeks) occurs earlier with higher peak of ethylene production as compared to flowers which have not been stored a at low temperature. Accompanying this climacteric peak of ethylene production, there is an increase in 1-aminocyclopropane-1-carboxylic acid (ACC) and MACC. The increase in ACC and MACC content was higher in cold stored flowers. In addition, ACC oxidase also shows a peak associated with senescence, coinciding with the peak of ethylene production, and it was greater in flowers stored for longer periods. | |
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