孕穗期低温胁迫对寒地粳稻功能叶片SOD、POD和CAT活性的影响  

Effect of Low Temperature Stress during Booting Stage on SOD, POD and CAT Activity in Functional Leaves of Japonica Rice in Cold Region

作　　者：韩涛[1] 赵宏伟[1] 贾琰[1] 赵振东[1] 谷海东[1] 刘洋[1] 邹德堂[1] 

机构地区：[1]东北农业大学农学院,哈尔滨150030

出　　处：《吉林农业科学》2015年第6期21-25,共5页Journal of　Jilin Agricultural Sciences

基　　金："十二五"农村领域国家科技计划项目(2013BAD20B04);科技部科技攻关项目(2011BAD35B02-01);科技部科技支撑项目(2011BAD16B11)

摘　　要：试验选用耐冷性不同的3个寒地粳稻品种东农428、松粳10和龙稻7为材料,研究孕穗期冷水胁迫处理后功能叶片超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的变化规律。试验结果表明:冷水胁迫后,3个品种功能叶片SOD、POD和CAT活性随着处理天数增加均呈现先升高后下降的趋势,品种间酶活性差异较大;胁迫后3个品种SOD、POD、CAT活性均降低,叶片表现出明显的冷害症状,但耐冷性较强的东农428具有相对较高的CAT活性;恢复期SOD和POD活性各处理间无显著变化,耐冷性最弱的松粳10和耐冷性中等的龙稻7的CAT活性在胁迫后仍然较高,而东农428的CAT活性则较低。Three japonica cultivars with different cold tolerances in cold region,‘Dongnong 428',‘Songjing 10' and ‘Longdao 7', were used as materials to study the change rules of SOD, POD and CAT activity in functionalrice leaves after cold stress during booting stage. The results showed that SOD, POD and CAT activity in functionalleaves of the three cultivars all presented the tendency of rising at first then declining as the increasing of stress day.There were a larger variance of enzymatic activity among cultivars. SOD, POD and CAT activity of the three culti-vars all reduced after stress, and obvious cold injury symptoms appeared in the leaves.‘Dongnong 428' with thebetter cold tolerance had higher CAT activity. SOD and POD activity during recovery phase had no significantchanges between each treatment. The CAT activity of‘Songjing 10' with the weakest cold tolerance and‘Longdao 7' with moderate cold tolerance were all higher after stress but‘Dongnong 428' were lower.

关 键 词：寒地粳稻 孕穗期 冷水胁迫 超氧化物歧化酶 过氧化氢酶 过氧化物酶 

分 类 号：S511.22[农业科学—作物学]