玉米叶片光合生理与抗旱性关系研究  

Studies on the Relationship between Drought Tolerance and Photosynthetic Physiological of Maize Leaf

作　　者：白向历[1] 孙世贤[2] 刘明[1] 杨国航[3] 张振平[1] 齐华[1] 

机构地区：[1]沈阳农业大学,沈阳110161 [2]全国农业技术推广服务中心,北京100026 [3]北京市农林科学院玉米研究中心,北京100097

出　　处：《种子》2009年第8期4-8,共5页Seed

基　　金：国家重点基础研究发展计划(2009CB118601);国家科技支撑计划(2006BAD02A13-4-5)

摘　　要：在水分胁迫条件下,对玉米叶片净光合速率、叶绿素含量及叶绿素荧光参数的变化进行了研究。结果表明:玉米叶片净光合速率(Pn)、叶绿素a(Chla)、叶绿素b(Chlb)、总叶绿素含量(Chl)、叶绿素a/b比值(Chla/b)、最大荧光(Fm)和PSⅡ光化学效率(Fv/Fm)比对照均有所下降,基础荧光(Fo)增加;Pn和Chla/b比值占对照百分率与品种抗旱性呈极显著正相关(r=0.880 7**,p<0.01;r=0.880 4**,p<0.01),Fo占对照百分率与品种抗旱性则呈显著负相关(r=-0.764 0*,p<0.05),Fm和Fv/Fm占对照百分率与品种抗旱性则呈显著正相关(r=0.711 6*,p<0.05;r=0.772 3*,p<0.05)。因此,净光合速率、叶绿素a/b比值、Fo、Fm和Fv/Fm可以用来评定不同玉米品种的抗旱性。The change of net photosynthetic rate of leaf, chlorophyll content and chlorophyll fluorescence parameters were studied under water stress. The result showed that net photosynthetic rate of leaf （Pn） ,chlorophyll a （ Chl a） ,chlorophyll b （ Chl b） ,total chlorophyll content （Chl）, value of chlorophyll a/b （ Chl a/b）, max fluorescence （Fm） and photochemical efficiency of PS Ⅱ （Fv/Fm） were decreased compared with the antitheses. The basis fluorescence （Fo） was increased. The ratio of Pn and Chl a/b in antitheses correlated positively to drought resistance very significantly （r =0.880 7^ ＊ ＊ ,p 〈0.01 ;r =0. 880 4^＊ ＊ ,p 〈0.01 ）. The ratio of Fo in antitheses correlated negative to drought resistance very significantly （ r = - 0.764 0^ ＊ , p 〈 0.05 ）. The ratio of Fm and Fv/ Fm in antitheses correlated positively to drought resistance very significantly. So the net photosynthetic rate, the value of chlorophyll a/b, Fo, Fm and Fv/Fm could be used to evaluate the drought resistance of different sweet maize varieties.

关 键 词：玉米 抗旱性 净光合速率 叶绿素含量 叶绿素荧光 

分 类 号：S513[农业科学—作物学]