水杨酸和脱落酸对低温胁迫下茉莉幼苗生理特性的影响  

Effect of salicylic acid and abscisic acid on physiological characteristics of jasmine seedlings under low temperature stress

作　　者：何丽斯[1,2] 夏冰[1,3] 孟祥静[1] 谭国华 贺佳[1] 彭峰[1] 汪仁[1] 

机构地区：[1]江苏省中国科学院植物研究所,江苏南京210014 [2]江苏省农业科学院园艺研究所,江苏南京210014 [3]南京农业大学园艺学院,江苏南京210095 [4]南京江宁华清花卉研究所,江苏南京211135

出　　处：《江苏农业学报》2011年第5期1083-1088,共6页Jiangsu Journal of Agricultural Sciences

基　　金：江苏省科技支撑计划项目(BE2008303)

摘　　要：以单、双瓣茉莉2年生扦插苗为试验材料,采用水杨酸(SA)和脱落酸(ABA)对2个茉莉品种幼苗进行预处理,研究6℃低温胁迫处理3 d的情况下茉莉的生理特性变化。结果表明,一定浓度的SA和ABA预处理能有效保护幼苗叶片膜系统的稳定性、增加渗透调节物质含量和提高抗氧化酶活性,其中,50 mg/L SA和5.0 mg/LABA预处理对提高单、双瓣茉莉抗寒性效果最好,且在两种外源物质预处理下,双瓣茉莉的抗寒性比单瓣茉莉的强。因此,施用适合浓度的SA或ABA在提高茉莉抗寒性方面具有较好的应用价值。The physiological mechanism of chilling tolerance was investigated in the 2-year-old cutting seedlings of two cultivars of Jasminum sambac（L.） Aiton（single petal jasmine and double petal jasmine） pretreated with salicylic acid or abscisic acid solutions under low temperature at 6 ℃ for 3 d.The results indicated that certain concentrations of SA and ABA could maintain the stability of membrane system and increase the content of osmotic regulators and antioxidant enzyme activities.Both 50 mg/L SA solution and 5.0 mg/L ABA solution were best for enhancing the chilling tolerance of two cultivars.The chilling tolerance of double petal jasmine was stronger than that of single petal jasmine in the pretreatments with SA and ABA.Those results suggested that appropriate concentration of SA and ABA could help to increase the chilling resistance of jasmine.

关 键 词：茉莉 水杨酸 脱落酸 低温胁迫 生理特性 

分 类 号：S685.16[农业科学—观赏园艺] Q945.78[农业科学—园艺学]