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干旱胁迫下冠菌素对玉米幼苗光合参数和内源激素含量的影响
引用本文:汪宝卿,李召虎,段留生,翟志席.干旱胁迫下冠菌素对玉米幼苗光合参数和内源激素含量的影响[J].植物生理学通讯,2007,43(2):269-272.
作者姓名:汪宝卿  李召虎  段留生  翟志席
作者单位:中国农业大学作物化学控制研究中心 北京100094
基金项目:国家高技术研究发展计划(863计划)
摘    要:采用沙培称重法研究冠菌素对玉米幼苗光合参数及内源激素系统影响的结果表明,干旱胁迫下,0.01μmol·L-1冠菌素显著增加玉米幼苗茎基部粗、根长、干鲜重、光合速率、蒸腾速率和气孔导度,降低胞间二氧化碳浓度,提高幼苗的ABA和1-氨基环丙烷-1-羧酸(ACC)含量。叶片与根中ABA/GA3大时耐旱性增大。

关 键 词:冠菌素  光合参数  内源激素  干旱
收稿时间:2006-12-19
修稿时间:2007-03-01

Effects of Coronatine on Photosynthesis Parameters and Endogenous Hormone Contents in Maize(Zea mays L.)Seedling under Drought Stress
WANG Bao-Qing,LI Zhao-Hu,DUAN Liu-Sheng,ZHAI Zhi-Xi.Effects of Coronatine on Photosynthesis Parameters and Endogenous Hormone Contents in Maize(Zea mays L.)Seedling under Drought Stress[J].Plant Physiology Communications,2007,43(2):269-272.
Authors:WANG Bao-Qing  LI Zhao-Hu  DUAN Liu-Sheng  ZHAI Zhi-Xi
Abstract:Weight method was used to investigate the effect of coronatine on photosynthesis parameters and endogenous hormone contents in maize (Zea mays) seedling under drought stress. The results showed that application of coronatine increased significantly diameter of basal stem, root length, seedling weight, photosyn- thesis rate (Pn), transpiration rate (Ts) and stomatal conductance (Gs). And it decreased significantly intercellular CO2 concentration (Ci) in leaf and significantly increased ABA and 1-aminocyclopropane-1-carboxylic acid (ACC) contents in maize seedling. The increased drought resistance of maize seedlings after coronatine treat- ment might be involved ABA/GA3 in leaf and root.
Keywords:coronatine  photosynthesis parameters  endogenous hormones  drought
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