水杨酸诱导非洲菊不同基因型的抗冷性研究  

The study on cold-resistance induced by Salicylic acid in two varieties of Gerbera jamesonii

作　　者：陈小兰[1] 包媛[1] 黄庆[1] 史冬燕[1] 陈善娜[1] 

机构地区：[1]云南大学生物技术系,云南昆明650091

出　　处：《西南农业学报》2005年第1期36-39,共4页Southwest China Journal of Agricultural Sciences

基　　金：云南省教育厅科学研究基金项目(02ZY003);云南大学校级科研项目(2002Q009SM)

摘　　要：对非洲菊冷敏感程度不同的两个基因型:WR6(冷敏感)和YR6(较抗冷)的幼苗进行了不同浓度(100、300和500mg/L)水杨酸(Salicylicacid,SA)预处理,低温胁迫(10±1℃)2d,常温恢复(25℃)4d,测定并比较了该过程中叶片细胞活力、抗氧化酶系活性、丙二醛和可溶性糖含量的变化。结果发现:YR6基因型具有比WR6高的抗氧化酶系活力和强的渗透调节能力,表现出较强的抗冷性;SA预处理提高了低温胁迫下两基因型的细胞活力,提高抗氧化酶系的活力,降低了膜脂过氧化产物丙二醛(MDA)的含量,从而提高抗冷性;SA诱导非洲菊抗冷性的最佳浓度是300×10-6。The pretreated and unpretreated seedlings with SA of two genotypes of Gerbera Jamesonii were placed under 10±1 ℃ for 48 h,then under normal temperature for 96 h.Their activities of antioxidant enzymes and content of MDA were measured. The result showed that SA could significantly enhance cold tolerance of G. jamesonii by changing activities of SOD,POD,CAT and AsAPOD , increasing the content of soluble sugar, and decreasing the contents of malondialdehyde( MDA). And the cold-resistance of YR6 was higher than that of WR6. The optimal concentrate of SA to induce chilling-resistance in Gerbera jamesonii was 300 mg/L.

关 键 词：非洲菊 水杨酸 诱导 抗冷性 

分 类 号：S682.11[农业科学—观赏园艺]