首页 | 本学科首页   官方微博 | 高级检索  
     检索      

高温对耐热大葱品种PSⅡ和抗氧化酶活性的影响
引用本文:梁雪,颜坤,梁燕,张雯婷,魏佑营,董新纯,孟庆伟,赵世杰.高温对耐热大葱品种PSⅡ和抗氧化酶活性的影响[J].园艺学报,2012,39(1):175-181.
作者姓名:梁雪  颜坤  梁燕  张雯婷  魏佑营  董新纯  孟庆伟  赵世杰
作者单位:(1作物生物学国家重点实验室,山东省作物生物学重点实验室,山东农业大学生命科学学院,山东泰安271018;2中国科学院烟台海岸带研究所,山东烟台264003)
基金项目:山东省科技发展计划项目,国家重点基础研究发展计划(‘973’)项目,国家自然科学基金项目(30970854)基金
摘    要: 以‘章丘大葱’为对照,研究了25 ~ 50 ℃下耐热大葱品种‘春味’、‘吉叶晚抽’和‘长悦’叶片丙二醛含量,电解质外渗率,叶绿素荧光参数和抗氧化酶活性的变化。结果表明,高温下耐热大葱品种叶片光系统Ⅱ(PSⅡ)最大光化学效率的下降和电解质外渗率的增加幅度小于章丘大葱,说明耐热大葱品种PSⅡ和细胞膜热稳定性高于章丘大葱。高温下,3个耐热大葱品种和章丘大葱叶片超氧化物歧化酶(SOD)、过氧化物酶(CAT)、抗坏血酸过氧化物酶(APX)活性上升,但耐热品种上升幅度显著高于章丘大葱,表明其叶片抗氧化能力较高。因此,耐热大葱品种叶片较高的抗氧化酶活性是其耐热性较强的原因之一。

关 键 词:大葱  耐热性  叶绿素荧光  抗氧化酶
收稿时间:2011-10-9
修稿时间:2011-12-5

Effects of High Temperature on PSⅡ and Antioxidant Enzymes Activities in Heattolerant Scallion
LIANG Xue,YAN Kun,LIANG Yan,ZHANG Wen-ting,WEI You-ying,DONG Xin-chun,MENG Qing-wei,and ZHAO Shi-jie.Effects of High Temperature on PSⅡ and Antioxidant Enzymes Activities in Heattolerant Scallion[J].Acta Horticulturae Sinica,2012,39(1):175-181.
Authors:LIANG Xue  YAN Kun  LIANG Yan  ZHANG Wen-ting  WEI You-ying  DONG Xin-chun  MENG Qing-wei  and ZHAO Shi-jie
Institution:(1State Key Lab of Crop Biology,Shandong Key Laboratory of Crop Biology,College of Life Sciences,Shandong Agricultural University,Tai’an,Shandong 271018,China;2Yantai Institute of Coastal Zone Research,Chinese Academy of Sciences,Yantai,Shandong 264003,China)
Abstract:Usin‘gZhangqiu Dacong’scallion as control,changes of malondialdehyd(eMDA)content, electrolyte leakage,chlorophyll fluorescence parameters and antioxidant enzyme activities were studied in leaves of heat-tolerant scallion,‘Chunwei’,‘Jiye Wanchou’And‘Changyue’,at 25–50℃.The results showed that the extent of decrease in the maximum photochemical efficiency of photosystemⅡand of the increase in electrolyte leakage in leaves of the heat-tolerant scallion was less than that in leaves of the ‘Zhangqiu Dacong’scallion at high temperature,indicating that the thermostability of photosystemⅡand cell membrane was higher in the heat-tolerant scallion than that in the‘Zhangqiu Dacong’scallion.At high temperature,the activities of superoxide dismutase(SOD),catalase(CAT)and ascorbate peroxidase (APX)increased in leaves of the heat-tolerant scallion and‘Zhangqiu Dacong’scallion,but the increase extent was greater in the summer scallion,which suggests that heat-tolerant scallion had a higher antioxidant capacity than the‘Zhangqiu Dacong’scallion did.Having higher antioxidant ability is one of the reasons for higher heat tolerance in the leaves of heat-tolerant scallion.
Keywords:summer scallion  heat tolerance  chlorophyll fluorescence  antioxidant enzymes
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《园艺学报》浏览原始摘要信息
点击此处可从《园艺学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号