摘要
以50μg·mL^-1水杨酸（SA）喷施湖北海棠（Malus hupehensis Rehd．）幼苗，结果显示：超氧阴离子O2^-的产生速率在处理后12—48h明显高于对照，而在72h以后明显低于对照；H2O2含量在水杨酸处理后，始终高于对照，并在处理后第12和48小时出现两次峰值。POD活性在处理12h后逐渐增加，SOD活性则在处理48h后才有显著的增加，而CAT在处理后24h内活性高于对照，48h后明显低于对照。SA还明显促进了脂过氧化产物丙二醛（MDA）的产生，也明显促进了叶片的超微弱发光，超微弱发光值在处理后的120h内始终高于对照，但在整个试验过程中超微弱发光的变化趋势与H2O2含量及O2的产生速率的变化趋势明显不同。
The change of active oxygen and uhraweak luminescence （UWL） in leaves was studied by spraying Malus hupehensis Rehd. seedlings with 50μg·mL^-1 exogenous salicylic acid （SA）. The results showed the generation rate of superoxide anion O2^- was higher than that of the control between 12 h and 48 h after treatment. H2O2 level was significantly increased with two peaks at the 12 h and 48 h. In the meantime, the activity of peroxidase （POD） was enhanced step by step from 12 h to 120 h, and superoxide dismutases （SOD） activity was significantly increased after 48 h of treatment. Moreover, catalase （CAT） activity was higher than that of the control within 24 h, but lower from 48 h to 120 h. The content of malondialdehyde （MDA） and uhraweak luminescence in leaves enhanced after SA treatment, and the value of UWL was higher than the control of all the time within 120 h. The change of UWL is different from one of the H2O2 and O2^- in the course of whole experiment.
出处
《园艺学报》
CAS
CSCD
北大核心
2006年第1期118-121,共4页
Acta Horticulturae Sinica
基金
山东省优秀中青年科学家奖励基金资助项目(02BS021)
关键词
水杨酸
湖北海棠
活性氧
超微弱发光
抗逆性
Salicylic acid
Malus hupehensis Rehd.
Active oxygen metabolism
Ultraweak luminescence
Resistance
