冰核细菌对杏花器官抗寒性的影响  

The Effect of Ice Nucleation Active Bacteria on Cold Resistance of Apricot Flower Organs

作　　者：杨建民[1] 孟庆瑞[1] 彭伟秀[1] 李绍华[2] 孙福在[3] 赵廷昌[3] 

机构地区：[1]河北农业大学林学院,保定071000 [2]中国农业大学园艺学院,北京100094 [3]中国农业科学院植保所,北京100094

出　　处：《园艺学报》2002年第1期20-24,共5页Acta Horticulturae Sinica

基　　金：河北省自然科学基金资助项目 (3 9914 7)

摘　　要：从田间采取两个仁用杏品种的大蕾期花枝 ,在室内进行水培。对花器官人工接种冰核 (INA)细菌 ,置于模拟自然霜夜的半导体制冷电脑控温和自动记录的人工霜箱内 ,研究INA细菌对花器官抗寒性的影响。结果表明 :杏花器官抗寒性顺序为花瓣 >雄蕊 >雌蕊。未接菌仁用杏花器官能抵抗 - 4～ - 6℃低温 ,而INA细菌能提高仁用杏花器官相对电导率 ,破坏膜保护酶SOD、POD的活性 ,使细胞积累大量自由基 ,并增强膜脂过氧化作用 ,加剧MDA含量的积累 ,使花器官发生严重褐变乃至死亡。INA细菌能在 - 2～ - 3℃诱发细胞结冰 ,使组织冰点提高 2℃左右 ,因此 。The hardiness of apricot flower organs were investigated with two varieties,by comparing the cold resistance.The obvious difference among the apricot flower organs and varieties with or without INA bacteria inoculation were observed.The variety Youyi had higher cold hardiness than Longwangmao.In addition,tests on the cold hardiness difference in various organs showed petal>stamen>pistal.Under stress of low temperatures,treatment of bacteria can greatly raise relative electric conductivity,permeability of cell membrane,brown change and content of MDA,and cut down SOD,POD activity of apricot organs.The treated flower organs showed symptoms of serious frost at -2 to -3℃,and had supercooling points of -2℃ about higher than controls.The results demonstrated that INA bacteria are one major factor to incite frost damage to apricot flower organs,so during flowering phage,frost injury may be relieved through control of INA bacteria.

关 键 词：影响 冰核细菌 仁用杏 花器官 抗寒性 霜冻 

分 类 号：S662.2[农业科学—果树学]