Cu^(2+)胁迫对糯和非糯玉米生长发育的影响  

Effects of Cu^(2+) Stress on Growth and Development of Glutinous and Non-glutinous Maize

作　　者：郑爱珍[1] 

机构地区：[1]商丘师范学院生命科学系,河南商丘476000

出　　处：《河南农业科学》2009年第11期59-63,共5页Journal of Henan Agricultural Sciences

基　　金：河南省自然科学基金项目(0511030200);河南省教育厅科技攻关项目(200510483005)

摘　　要：选择糯、非糯玉米种子,在相同的Cu2+浓度梯度下胁迫培养。结果表明:低浓度的铜具有促进玉米种子萌发的作用,50mg/LCu2+处理浓度下二者的发芽势和发芽率均达到高峰,随着Cu2+处理浓度的加大,2种玉米的发芽率和发芽势呈下降趋势;20mg/LCu2+处理浓度对2种玉米的根长、株高、地上部分和根的干重具有显著的抑制作用,随着处理浓度的增加,这种抑制效应更为明显;随着处理浓度的增加叶绿素a、b和总叶绿素含量呈下降趋势,而叶绿素a/b的比值却升高。研究发现:在发育早期,糯玉米对Cu2+的敏感性强于非糯玉米,非糯玉米对Cu2+胁迫具有较强的耐受力和适应性。The seeds of both glutinous and non-glutinous maizes were cultured under Cu^2＋stresses with an identical gradient of Cu^2＋ concentration.The results showed that the lower Cu^2＋ concentration could promote the seed germination of maize,and the treatment with 50mg/L Cu^2＋ had the highest germination potential and germination rates for both maizes,but with the increase of Cu^2＋ concentration,the two characters presented a decreased trend.20mg/L Cu^2＋ concentration could significantly inhibit the root length,plant height,dry matter weight（DW）of leaves and roots,and chlorophyll content.With the increase of Cu^2＋ concentration,the chlorophyll a,b and content dropped,but the a/b rate increased.Compared with glutinous maize,non-glutinous maize had narrow changing amplitudes for all indexes measured,demonstrating that it had stronger adaptation to Cu^2＋ stress than the former.

关 键 词：Cu2+胁迫 糯玉米 非糯玉米 

分 类 号：S513[农业科学—作物学]