摘要
为探究抗、感玉米幼苗在玉米蚜(Rhopalosiphum maidis)为害后不同时间的生理响应,本试验初步测定了接种蚜虫后不同时间(0 h、24 h、48 h、96 h)感蚜品种蠡玉16和抗蚜品种郑单958三叶期叶片的叶绿素、丙二醛、可溶性糖、可溶性蛋白质含量及5种保护酶活性的变化。结果表明,随着接种蚜虫时间的增加,两个玉米品种的叶绿素含量呈先下降后上升的趋势;两个玉米品种的丙二醛、可溶性糖、可溶性蛋白质含量呈先升高后下降的趋势;在接种蚜虫后24 h时,两个品种的叶绿素含量下降到最小值,其中郑单958的叶绿素含量下降幅度小于蠡玉16;在接种蚜虫24 h时,两个品种的丙二醛、可溶性糖、可溶性蛋白质含量上升达到最大值,其中郑单958的可溶性糖和丙二醛含量上升幅度低于蠡玉16,郑单958的可溶性蛋白质含量上升幅度大于蠡玉16;在整个时间段内(0 h、24h、48 h、96 h),感蚜品种蠡玉16对照组的可溶性糖和可溶性蛋白质含量均高于抗蚜品种郑单958对照组。因此,叶绿素含量下降幅度与抗蚜性呈负相关关系,抗性高的品种下降缓慢,而可溶性糖、可溶性蛋白质含量与抗蚜性呈负相关,含量低的品种抗性较高。在蚜虫为害过程中,两个玉米品种的超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性均呈先升高后下降的趋势,苯丙氨酸解氨酶(PAL)活性呈逐渐升高的趋势,而两个玉米品种的多酚氧化酶(PPO)活性表现不一致,郑单958的PPO活性随玉米蚜刺吸时间的延长而上升,蠡玉16的PPO活性随刺吸时间的延长而下降。感蚜品种蠡玉16的SOD、POD、CAT和PAL活性升高率一直低于抗蚜品种郑单958;蠡玉16的PPO活性接种蚜虫前期高于郑单958,到了接种蚜虫后期则低于郑单958。说明SOD、CAT、POD活性升高可能是玉米接种蚜虫前期(0~24 h)抗蚜的主要因素,PPO、PAL活性升高可能是玉米接种蚜虫后期(48~96 h)�
In order to investigate the physiological response of resistant and susceptible maize seedlings at different time after Rhopalosiphum maidis stress,the dynamic changes of malondialdehyde（ MDA）,soluble sugar,chlorophyll（ Chl.）,soluble protein and five protective enzymes in Zhengdan958（ resistant variety） and Liyu16（ susceptible variety） were measured at different time（ 0 h,24 h,48 h,96 h） in three leaf stage. The results showed that with the increase of aphid stress time,the chlorophyll content of the two maize varieties first decreased,then increased.However,the contents of malondialdehyde,soluble sugar and soluble protein in the two maize varieties first increased,then decreased. The chlorophyll content of the two maize varieties decreased to the minimum value at 24 h after aphid stress,and chlorophyll content of Zhengdan 958 decreased less than that of Liyu 16. The content of MDA,soluble sugar and soluble protein of two varieties increased to the maximum at 24 h after aphid stress. The increase of soluble sugar and malondialdehyde in Zhengdan 958 was lower than that in Liyu 16,but the increase of soluble protein in Zhengdan 958 was greater than that in Liyu 16. In the entire period of time（ 0 h,24 h,48 h,96 h）,the contents of soluble sugar and soluble protein in the control group of susceptible variety Liyu 16 were higher than those in the control group of resistant cultivar Zhengdan958. Therefore,the decrease of chlorophyll content was negatively correlated with aphid resistance,and the varieties with high resistance declined slowly. The contents of soluble sugar,soluble protein were negatively correlated with aphid resistance,the varieties with lower soluble sugar and lower soluble protein had higher resistance. During the process of aphid stress,superoxide dismutase（ SOD）,peroxidase（ POD） and catalase（ CAT） of two maize varieties first increased and then decreased,the activity of phenylalanine ammonia lyase（ PAL） increased gradually,while the activity of polyphenol oxi
作者
武德功
王俊
张露雨
杜存康
杜军利
黄伟东
易克传
余海兵
WU De-gong;WANG Jun;ZHANG Lu-yu;DU Cun-kang;DU Jun-li;HUANG Wei-dong;YI Ke-chuan;YU Hai-bing(College of Agriculture,Anhui Science and Technology University,Fengyang 233100,China;Institute of Tobacco,Anhui Academy of Agricultural Sciences,Hefei 230001,China)
出处
《江苏农业学报》
CSCD
北大核心
2018年第3期493-502,共10页
Jiangsu Journal of Agricultural Sciences
基金
安徽省教育厅重点项目(KJ2016A825
KJ2018A0543)
安徽科技学院引进人才项目(ZRC2012326
ZRC2014399)
安徽科技学院植物保护重点学科项目(AKZDXK2015C04)
国家级大学生创新课题项目(201610879004
201710879074)
安徽省省级质量工程项目植物保护特色专业专项项目(2015tszy022)
安徽省农业科学院人才发展专项资金项目(17F0913)
关键词
玉米蚜
玉米
抗蚜性
Rhopalosiphum maidis
Zea mays
aphid resistance
