除草剂2-甲-4-氯钠胁迫对茭白生理特性的影响  

Effect of MCPA-Na Stress on Physiological Characteristics of Zizania caduciflora (Turcz.) Hand. -Mazz.

作　　者：黄凯丰 房艳[3] 江解增[1] 

机构地区：[1]扬州大学水生蔬菜研究室,江苏扬州225009 [2]贵州师范大学生命科学学院植物遗传育种研究所,贵州贵阳550001 [3]扬州市邗江区沙头镇政府,江苏扬州225105

出　　处：《中国蔬菜》2011年第12期52-55,共4页China Vegetables

基　　金：国土资源部与江苏省政府合作项目〔(2003)019-01〕;江苏省农业三项工程项目〔sx(2005)089〕

摘　　要：以茭白的单季茭品种蒋墅茭和双季茭品种葑红早为试材,利用不同浓度的除草剂2-甲-4-氯钠(MCPA-Na)进行处理,并测定茭白根系的活力、叶片的细胞膜透性,叶绿素、丙二醛、脯氨酸含量,过氧化物酶(POD)和多酚氧化酶(PPO)的活性,以探讨2-甲-4-氯钠对茭白生理特性的影响。结果表明:低浓度的2-甲-4-氯钠处理能促进两茭白品种根系活力、叶绿素含量的增加,随2-甲-4-氯钠处理浓度的进一步增加而下降;细胞膜透性、丙二醛和脯氨酸的含量、POD和PPO的活性则随2-甲-4-氯钠处理浓度的增加而增加;两茭白品种受2-甲-4-氯钠伤害的程度随处理时间的增加而增加,品种间存在差异。The Changes of physiological and biochemical indexes in leaves and roots of Zizania caduciflora(Turcz.)Hand.-Mazz.were studied every 5 days on single-harvested cultivar'Jiangshujiao'and double-harvested cultivar'Fenghongzao',which were treated with different concentration of MCPA-Na.The effect of MCPA-Na on physiological characteristics of Zizania caduciflora(Turcz.)Hand.-Mazz.as discussed.The results indicated that the root activity and chlorophyll content of the 2 varieties were increased when treated with low concentration of MCPA-Na.While they were decreased when increasing the concentration of MCPA-Na.However,the membrane permeability,MDA and praline contents,POD and PPO activities of Zizania caduciflora(Turcz.)Hand.-Mazz.were increased when increasing MCPA-Na concentration.Injury of MCPA-Na stress to the 2 Zizania caduciflora(Turcz.)Hand.-Mazz.varieties were increased along with the increasing of treating times.There were differences between cultivars.

关 键 词：茭白 2-甲-4-氯钠 生理特性 

分 类 号：S645.2[农业科学—蔬菜学]