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- Author or Editor: A. J. Lukaszewska x
- HortScience x
Abstract
Ethylene treatment affected protease activity in ovaries, but not petals, of cut roses (Rosa hybrida L.) ‘Sonia’. Protease activity in ovaries of ethylene-treated flowers decreased within the first 3 days and then remained at the same level until the 12th day. In ovaries from controls, protease activity decreased from day 6 until day 9 and then remained constant until day 12. Protease activity of petals did not differ significantly between the ethylene-treated and control flowers; it was constant until day 6 and then increased steadily until day 12. Differences between ethylene-treated and control flowers were visible immediately after treatment (day 1) and until day 3, as the sepals of the ethylene-treated flowers reflexed. Later (day 6), this difference disappeared as the sepals of the control flowers also reflexed. On day 9 the outer petals of the ethylene-treated flowers were bluish, whereas the controls were not. There were no other differences in development between treated and control flowers.