Ethylene biosynthesis and membrane microviscosity changes of cut rose Rosa hybrid cv. ‘Nobless’ by calcium chloride pulse and dry cold storage
Ruey-Song Lin and May-Hsiu Kuo
Abstracts of 27th International Horticultural Congress & Exhibition (IHC 2006), August 13-19, 2006, COEX (Convention & Exhibition), Seoul, Korea. 494 pages.
2006
บทคัดย่อ
Ethylene biosynthesis and membrane microviscosity changes of cut rose Rosa hybrid cv. ‘Nobless’ by calcium chloride pulse and dry cold storage
In cut roses, Rosahybrida L.cv. ‘Nobless’, pulsed with 10 mM proline and 10 mM CaCI2 water uptake capability was enhanced and flower opening promoted after cold storage.In such stored cut roses characteristic changes occurred in membranes, and ethylene production and electrolyte leakage increased.When flowers were pulsed with CaCl2 at 10 mM.ACO activity was significantly inhibited, ethylene production was reduced, and membrane microviscosity was less than control flowers during vase life.Nevertheless, post cold storage.ACC accumulated in petals and an earlier and higher ethylene peak occurred.At 8°C, the ethylene reached a peak of 1.34 nl/g/hr on the third day in the vase.The cut roses low temperature stress when stored at 8 °C.Once flowers were rewarmed, the membrane microviscosity reached 2.24 poise which was similar to the controls at the fully open stage.Both cortical and pith cells of pedicel tissue were deformed as a result of water loss after 8°C storage.