低温胁迫对墨西哥玉米幼苗抗寒性的影响  

Effect of low temperature stress on the cold resistance of Zea mexicana seedling

作　　者：蒋安[1] 郭彦军[2] 范彦[1] 向白菊[1] 何玮[1] 王琳[1] 张健[1] 

机构地区：[1]重庆市畜牧科学院,重庆400080 [2]西南大学动物科技学院,重庆400716

出　　处：《草业科学》2010年第3期89-92,共4页Pratacultural Science

基　　金：重庆市重点科技攻关项目"主推优质牧草品种高效集约生产技术研究与产业化示范"(CSTC;2008AB1124);重庆市农委科技先导项目"优质高产墨西哥玉米高效栽培与利用技术示范";重庆市畜科院基础研究计划项目"利用转基因技术创制玉米草抗寒新材料的研究"

摘　　要：在5和15℃低温胁迫下,对墨西哥玉米Zea mexicana的2种新材料玉米草1号和玉米草2号叶片内部与抗寒性有关的某些生理生化指标在处理6、24、487、2 h后的变化进行了研究。比较了不同低温处理下,不同材料生理指标变化情况,通过变化规律分析2种材料的抗寒性大小。结果表明,从3个生理指标上看,随温度降低,玉米草1号能保持更好的细胞膜完整性和更低的丙二醛含量,并诱导产生更多的脯氨酸,说明玉米草1号比玉米草2号具有更强的耐寒性。Under low temperature stress of 5 ℃ and 15℃, the physiological and biochemical indexes related to cold resistance in the leaves of two kinds of new material of forage maize SAUMZ1 No. 1 and No. 2 were investigated after the treatments of 6, 24, 48, and 72 hours. The change of physiological and biochemical indexes under different low temperature was compared, and the cold resistance of two kinds of new material was analyzed. The results showed that the forage maize SAUMZ1 No. 1 had integrity plasma membrane and lower production of MDA, and induced more proline content with the temperature dropped. So forage maize SAUMZ1 No. 1 was more cold tolerance than No. 2 according to the three physiological indexes.

关 键 词：低温胁迫 墨西哥玉米幼苗 脯氨酸 丙二醛 电解质渗出率 

分 类 号：S548[农业科学—作物学]