【摘要】 以牡丹品种‘玉面桃花’、‘清香白’和‘凤丹’切花为试验材料,测定室温对照(15~18℃保湿贮藏3d,RTS)、低温锻炼[(4±1)℃保湿贮藏3d,CAS]、冰温贮藏[(4±1)℃保湿贮藏3d,然后转入(-4±1)℃保湿贮藏3d,ITS]3种处理的牡丹切花花枝不同器官(花瓣、花药、子房、萼片、叶柄、叶片、茎杆)的过冷点(SCP)和冰点温度(FP),以及花瓣和叶片束缚水与渗透调节物质含量变化,明确低温锻炼对其切花抗冷能力的影响,为牡丹切花储运及销售过程中冰温贮藏温度控制提供参考依据。结果表明:经4℃低温锻炼3d的牡丹切花与室温对照相比,低温锻炼处理使3个牡丹切花不同组织的SCP和FP显著降低,但花瓣和叶片的束缚水、可溶性蛋白质、可溶性糖和脯氨酸含量均得到提高;冷锻炼后转入冰温贮藏处理进一步提高了牡丹切花花瓣和叶片的束缚水和可溶性蛋白质含量。研究发现,4℃低温锻炼显著提高了牡丹切花的抗冷性,使花枝能够更好地适应30~150d长期贮藏的-3~-4℃冰温环境。更多还原

【Abstract】 Super-cooling point and freezing point of seven cut flower organs(petals,anthers,ovary,sepals,petioles,leaves and stems)from three tree peony varieties‘Yumiantaohua’,‘Qingxiangbai’and‘Fengdan’under the room temperature storage(in 15-18℃storage for 3 d,RTS),coldacclimation storage[in(4±1)℃ storage for 3 d,CAS]and ice temperature storage[first in(4±1)℃storage for 3 d,and then turned to(-4±1)℃storage for 3 d,ITS]conditions were studied,and contents of bound water,soluble protein,soluble sugar and proline in petals and leaves of tree peony cut flowers were also examined,respectively.Having been stored at 4 ℃ for 3 d,the results of CAS showed that compared with the RTS,CAS significantly reduced the super-cooling points(SCP)and freezing points(FP)of most cut flower organs of these three tree peony,increased the contents of bound water,soluble protein,soluble sugar and proline in petals and leaves.And after ITS for 3 d,the contents of bound water and soluble protein are further increased in petals and leaves,respectively.Thus,the CAS treatment significantly improved thecold resistance of tree peony cut flowers and favored the ITS.These results provide the technical basis for the regulation and control of ITS(-3 to-4 ℃)and for long time storage(30 to 150 d)of tree peony cut flowers.更多还原