化學藥劑預措對玫瑰切花低溫乾藏後老化生理之影響

Abstract

本試驗利用黛安娜‘Noblesse’玫瑰切花商業栽培品種作為試驗材料，調查低溫乾藏後關鍵老化機制之探討，並針對冷藏後生理的劣變研發利用適合之藥劑加以改善。玫瑰切花經由100 ppm Agral-LN 預措對於貯藏切花鮮重之維持僅於瓶插初期有效用，10 mM proline 及 10 mM CaCl2 處理皆可以提升切花貯藏後之吸水能力並促進花朵的開放。切花經低溫貯藏後常會造成膜體性質的改變、乙烯的生成及離子滲漏率的增加，使用 CaCl2 預措則可顯著的抑制ACO 的活性，進而降低乙烯的生成，並且有降低膜體微黏稠度的效果，尤其可延緩8℃貯藏之切花細胞微黏稠度的提升，而接近4℃貯藏者之變化趨勢，並藉由穩定膜體完整性，達到改善貯藏後切花品質之目的。 Cut flower of Rosa Hybrida L. cv. ‘Nobless’ was studied to investigate the crucial aging mechanism after dry cold storage to improve the deteriorated damage cold storage flowers resulted from disorder physiological changes of cut roses. The cut flowers pulsed with 100 ppm Agral-LN, could only maintain its fresh weight at the early stage in vase. Cut rose pulsed with 10 mM proline and 10 mM CaCl2 could enhance the water uptake capability and promote the flower opening after cold storage. The cold storage cut roses existed membrane characteristic changes, increase of ethylene production and electrolyte leakage. Consequently, flowers pulsed with CaCl2, the ACO activity could be inhibited significantly, the ethylene production could be reduced, and the membrane microviscosity was less than no treatment had. As a result the cut flowers handled with 8°C storage could delay the increase trend of microviscosity and its pattern was similar to that cut roses handled with 4°C storage. In terms of stability of membrane integrity through delayed membrane microviscosity on rising trend, the accomplishment of quality improvement of flowers which suffered cold stored came true.