小苍兰切花瓶插生理研究  

Studies on Physiological Characteristics of Cut Freesia Flowers During Vase Holding

作　　者：袁媛[1,2] 余忆冬[2] 连芳青[1] 唐东芹[2] 

机构地区：[1]江西农业大学园林与艺术学院,南昌330045 [2]上海交通大学农业与生物学院,上海200240

出　　处：《园艺学报》2011年第3期579-586,共8页Acta Horticulturae Sinica

基　　金：国家自然科学基金项目(30872061)

摘　　要：以小苍兰品种‘上农金皇后’为材料,观察其鲜切花瓶插过程中花的发育变化及生理特性。结果表明,小苍兰切花单花的瓶插寿命不足一周,整个花序可达10d。花瓣中的含水量和可溶性蛋白含量在瓶插前期升高,后期则加速下降。超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和抗坏血酸过氧化物酶(APX)活性呈现相似的变化趋势,在瓶插前期均呈上升趋势,4d达到峰值后稳步下降;过氧化物酶(POD)活性则在整个瓶插期间持续上升。超氧阴离子自由基(O2-)随瓶插时间增加而不断积累。丙二醛(MDA)含量和相对电导率(EL)也随瓶插时间增加而上升。失水、抗氧化酶活性下降、自由基的累积以及膜脂过氧化水平的增加是小苍兰切花衰老的主要原因。The cut flowers of Freesia hybrida ＇Shangnong Jinhuanghou＇ were used as materials to study their phenotype changes and their physiologic response during vase holding.The results showed the vase life of an individual flower and a whole inflorescence was less than one week and 10 days, respectively.The contents of natural water and soluble protein in the petals increased at the early stage of vase holding,and then decreased 4 days later.The activities of superoxide dismutase （SOD）,catalase （CAT）and ascorbate peroxidase（APX）increased in preceding stage,and decreased rapidly in later stage. However,the activity of peroxidase（POD）increased with the time postponing of vase holding.The content of superoxide radical （O2-）was accumulated during vase holding.Meanwhile,the malondialdehyde（MDA） content and the electrolyte leakage increased with the process of vase holding.The water loss,the decrease of activities of antioxidant enzymes and the accumulation of O2- and rising of lipid peroxidation level were considered to be the main physiological causes of senescence of cut Freesia flowers.

关 键 词：小苍兰 切花 活性氧 抗氧化酶 膜系统 衰老 

分 类 号：S682.19[农业科学—观赏园艺]