干旱胁迫对差巴嘎蒿苗期内源激素含量的影响  

Effects of Drought Stress on Content of Endogenous Phytohormones of Artemisia halodendron at Seedling Stage

作　　者：满达[1] 宛涛[1] 蔡萍[2] 徐振朋[1] 石文宏 

机构地区：[1]内蒙古农业大学草原与资源环境学院,内蒙古呼和浩特010019 [2]锡林郭勒职业学院草原生态与畜牧兽医学院,内蒙古锡林浩特026000

出　　处：《中国草地学报》2017年第3期44-48,120,共6页Chinese Journal of Grassland

基　　金：内蒙古自然科学基金项目(2016MS0321)

摘　　要：模拟自然干旱环境条件,采用酶联免疫吸附法对差巴嘎蒿苗期的根系与叶片中内源激素脱落酸(ABA)、吲哚乙酸(IAA)、赤霉素(GA_3)和玉米素核苷(ZR)含量进行测定,探讨差巴嘎蒿苗期的抗旱性与内源激素之间的关系。结果表明:随着基质含水量的减少,差巴嘎蒿苗期的叶片和根系中内源激素ABA和GA3呈增加趋势,IAA和ZR呈减少趋势;IAA/ABA和ZR/ABA的比值降低较为明显,但对GA3/ABA、GA3/IAA、ZR/GA3和ZR/IAA影响较小,表明差巴嘎蒿幼苗通过调节自身内源激素含量及比例来适应干旱胁迫。This experiment simulated the condition of natural drought environment, and adopted en- zyme-linked method to measure the endogenous hormone （ABA,IAA,GA3 and ZR） contents of root and leaf o{ Artemisia halodendron at seedling stage to explore the relationship between the drought resistance of A.halodendron seedling and the endogenous hormone. The results showed that, with reducing of water content, seedling leaf and endogenous hormone ABA and GAs from root were on a rising trend, whereas IAA and ZR showed a decreasing trend; The ratio of IAA/ABA and ZR/ABA reduced more significantly, which exerts minor impact on GA3/ABA、GA3/IAA.ZR/GA3 and ZR/IAA. It is proven that A.haloden- dron seedling adapted to drought stress by adjust the content and ratio of its own endogenous hormone.

关 键 词：差巴嘎蒿 干旱胁迫 内源激素 

分 类 号：Q945.78[生物学—植物学]