| 低温胁迫下聚糖萘合剂对玉米幼苗光合作用和抗氧化酶活性的影响 |
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| 引用本文： | 徐田军,董志强,兰宏亮,裴志超,高娇,解振兴.低温胁迫下聚糖萘合剂对玉米幼苗光合作用和抗氧化酶活性的影响[J].作物学报,2012,38(2):352-359. |
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| 作者姓名： | 徐田军 董志强 兰宏亮 裴志超 高娇 解振兴 |
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| 作者单位： | 1 中国农业科学院作物科学研究所 / 农业部作物生理生态与栽培重点开放实验室, 北京100081; 2 北京市农业技术推广站, 北京100029 |
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| 基金项目： | 国家自然科学基金项目(30971726);国家科技支撑计划项目(2006BAD02A13-4)资助 |
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| 摘 要： | 采用盆栽试验, 以郑单958和丰单3号为材料, 研究了低温胁迫对玉米幼苗光合作用、叶绿素、叶绿素荧光参数和抗氧化酶活性的影响, 以及聚糠萘合剂(PKN)的调控效果。结果表明, 低温胁迫下, 玉米幼苗的光合作用和光系统II光化学最大效率受到抑制; 超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性降低; 过氧化氢、超氧阴离子的产生速率及丙二醛(MDA)含量显著升高。PKN处理提高了低温胁迫下玉米幼苗净光合速率(Pn)、气孔导度(Gs)、光系统II光化学的最大效率(Fv/Fm)、叶绿素含量(Chl a+Chl b)。低温处理7 d, ZDTR和FDTR的Pn、Gs、Fv/Fm、Chl a+Chl b分别比各自的对照提高了88.95%和61.11%、593.33%和1 741.67%、111.50%和145.16%、36.61%和54.03%; PKN处理延缓了SOD、POD、CAT活性的降低, 低温胁迫7 d, PKN处理使郑单958和丰单3的SOD、POD、CAT活性分别比对照高了292.59%和632.98%、295.07%和360.54%、254.55%和265.45%; 同时降低了过氧化氢、超氧阴离子的产生速率及MDA的含量。表明PKN处理有利于提高玉米幼苗的抗冷性。
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| 关 键 词： | 冷害胁迫 抗氧化酶 光合作用 玉米幼苗 化学调控 |
| 收稿时间： | 2011-03-31 |
Effects of PASP-KT-NAA on Photosynthesis and Antioxidant Enzyme Activities of Maize Seedlings under Low Temperature Stress |
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| XU Tian-Jun,DONG Zhi-Qiang,LAN Hong-Liang,PEI Zhi-Chao,GAO Jiao,and XIE Zhen-Xing.Effects of PASP-KT-NAA on Photosynthesis and Antioxidant Enzyme Activities of Maize Seedlings under Low Temperature Stress[J].Acta Agronomica Sinica,2012,38(2):352-359. |
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| Authors: | XU Tian-Jun DONG Zhi-Qiang LAN Hong-Liang PEI Zhi-Chao GAO Jiao and XIE Zhen-Xing |
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| Affiliation: | 1.Institute of Crop Science, Chinese Academy of Agricultural Sciences/ Key Laboratory of Crop Eco-physiology and Cultivation, Beijing 100081, China;2.Beijing Agricultural Technology Extension Station, Beijing 100029, China |
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| Abstract: | A pot experiment of maize seedlings was conducted to investigate the effects of low temperature stress and the chemi-cal regulator of PASP-KT-NAA(PKN) on photosynthetic,physiological parameters,chlorophyll contents,and various antioxidant enzymes activities.The results showed that,in maize seedlings under low temperature stress,the photosynthesis ability and SOD,POD,CAT activities reduced;the formation speed of hydrogen peroxide and superoxide anion,as well as MDA contents in-creased.PKN pretreatment increased Pn,Gs,Fv/Fm,and chlorophyll contents.Under low temperature stress for seven days,Pn,Gs,Fv/Fm,chlorophyll contents of Zhengdan 958 treatment(ZDTR) and Fengdan 3 treatment(FDTR) were higher than those of CK,which was increased by 88.95% and 61.11%,593.33% and 1 741.67%,111.50% and 145.16%,36.61% and 54.03%.While the formation speed of hydrogen peroxide and superoxide anion reduced,MDA contents decreased too.Simultaneously,SOD,POD,CAT activities were increased by 292.59% and 632.98%,295.07% and 360.54%,254.55% and 265.45%.In conclusion,PKN pretreatment can improve the cold resistance of maize seedlings |
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| Keywords: | Low temperature stress Antioxidant enzyme Photosynthesis Maize seedlings PKN regulation |
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