干旱胁迫对杂交鹅掌楸无性系叶片内源激素含量的影响  

Effects of Drought Stress on Contents of Endogenous Hormones in Leaves of Different Clones of Liriodendron chinense×L. tulipifera

作　　者：孙志勇[1,2] 季孔庶[2] 

机构地区：[1]天津市园林绿化研究所,天津300181 [2]南京林业大学林木遗传与生物技术省部共建教育部重点实验室,江苏南京210037

出　　处：《安徽农业科学》2010年第31期17362-17364,共3页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金项目(30070633);国家"十一五"科技支撑计划项目(2007BAD67B02)

摘　　要：[目的]研究干旱胁迫对杂交鹅掌楸无性系叶片内源激素含量的影响。[方法]挑选抗旱性强的杂交鹅掌楸无性系NE25、NE78与抗旱性差的无性系NE04、NE23的1年生扦插苗为试验材料,对干旱胁迫下各无性系叶片中脱落酸(ABA)、吲哚乙酸(IAA)、玉米素核苷(ZR)和茉莉酸(JA)4种内源激素的含量变化进行研究。[结果]干旱胁迫下,杂交鹅掌楸各无性系叶片ABA大量积累,抗旱性强的无性系含量变化不明显;IAA含量总体呈下降趋势,且抗旱性强的无性系含量变化较大;ZR含量变化各异,胁迫末期抗旱性强的无性系叶片ZR含量减少;抗性差的无性系叶片JA含量上升,说明抗性差的无性系需要维持较高的JA来抵御干旱胁迫。[结论]该研究结果为杂交鹅掌楸耐旱无性系的筛选、园林栽培及应用提供了科学依据。[ Objective] The aim was to study the effects of drought stress on contents of endogenous hormones in leaves of different clones of Liriodendron chinense x L. tulipifera. Drought-resistant Liriodendron chinense × L. tulipifera clones NE25 ,NE78 and drought-sensitive L. chinense × L. tulipifera clones NE04, NE23 were selected as experimental materials to study the content changes .of four kinds of endogenous hormones such as abscisic acid （ABA）, indoleacetic acid （IAA）,ribosylzeatin （ZR） and j asmonic acid （JA） in leaves of different clones under drought stress. [Result] Under drought stress, ABA was accumulated in leaves of different clones, however, the content changes in drought-resistant clones were not obvious; IAA content showed a decreasing trend, and the content changes in drought-resistant clones were relatively larger; changes of ZR contents in different clones were different, and ZR content in leaves of drought-resistant clones during later period of drought stress was decreased ; JA content showed an increasing trend in leaves of drought-sensitive clones,indicating that drought-sensitive clones had to maintain higher contents of JA to resist drought stress. [ Conclusion ] The result of this study had provided scientific basis for the screening, planting and application of drought-resistant clones of L. chinense × L. tulipifera.

关 键 词：杂交鹅掌楸 无性系 干旱胁迫 内源激素 

分 类 号：S688[农业科学—观赏园艺]