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不同抗旱性小麦品种对干旱胁迫的响应及NO的调节作用
引用本文:曲小菲,吕淑敏,王林华,梁书荣,刘魏魏,赵会杰.不同抗旱性小麦品种对干旱胁迫的响应及NO的调节作用[J].安徽农业科学,2010,38(19):10001-10003,10025.
作者姓名:曲小菲  吕淑敏  王林华  梁书荣  刘魏魏  赵会杰
作者单位:河南农业大学生命科学学院,河南郑州,450002;河南农业大学农学院,河南郑州,450002
基金项目:国家自然科学基金,河南省科技攻关项目 
摘    要:目的]研究不同抗旱性小麦品种对干旱胁迫的响应机制,并探明外源NO对干旱胁迫下小麦叶片氧化损伤及光合机构的保护作用。方法]以低抗品种预麦949和高抗品种峡麦5号为试验材料,用15%PEG-6000对五叶期幼苗模拟干旱胁迫,然后使用0.75mmol/LSNP(硝普钠,外源NO供体)进行调节,并测定体内抗氧化和光合活性。试验设置3个处理。结果]高抗品种峡麦5号的SOD、CAT和APX活性,MDA含量和叶绿素含量均比高产低抗品种预麦949高;在干旱胁迫下,高抗品种的这些生理指标变化幅度小于高产低抗品种;同时,NO显著提高了这些生理指标对干旱胁迫的适应性。结论]外源NO能够提高干旱胁迫下小麦叶片抗氧化酶的活性,增强小麦的抗旱性。

关 键 词:小麦  干旱胁迫  NO  调节

The Response of Different Drought-resistance of Wheat Varieties under Drought Stress and the Regulating Role of Nitric Oxygen
OU Xiao-fei et al.The Response of Different Drought-resistance of Wheat Varieties under Drought Stress and the Regulating Role of Nitric Oxygen[J].Journal of Anhui Agricultural Sciences,2010,38(19):10001-10003,10025.
Authors:OU Xiao-fei
Institution:OU Xiao-fei et al(College of Life Scioence,Henan Agricultural University,Zhengzhou,Henan 450002)
Abstract:Objective]The aim was to study the response mechanism of drought stress of wheat varieties in different drought-resistance species,and protect the effection of exogenous NO on oxidative damage and photosynthetic apparatus of wheat leaves under drought stress.Method]Using low-resistance Yumai 949 and high-resistance Xiamai 5 as test materials,drought stress was carried out to seedlings in five-leaf stage with 15% PEG-6 000,and then NO(0.75 mmol/L SNP,sodium nitroprusside,exogenous NO donor)was used for reg...
Keywords:NO
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