干旱胁迫对披碱草幼苗根系生理的影响  

Effects of drought stress on root physiology of Elymus seedlings

作　　者：王晓龙 闫利军[2] WANG Xiaolong;YAN Lijun(Branch of Animal Husbandry and Veterinary of Heilongjiang Academy of Agricultural Sciences,Qiqihar 161005,Heilongjiang,China;Sichuan Academy of Grassland Sciences,Hongyuan 624400,Sichuan,China)

机构地区：[1]黑龙江省农业科学院畜牧兽医分院,黑龙江齐齐哈尔161005 [2]四川省草原科学研究院,四川红原624400

出　　处：《草学》2024年第4期38-42,共5页Journal of Grassland and Forage Science

基　　金：国家林业和草原局应急科技揭榜挂帅项目“草种优良品种选育”(20220102);四川省科研院所成果转化项目“川西高原乡土草新品种良种繁育与示范推广”(2022JDZH0002);四川省“十四五”饲草育种攻关项目(2021YFYZ0013-2)。

摘　　要：采用盆栽幼苗培育法,在干旱胁迫处理下分析了3种披碱草幼苗根系的丙二醛、游离脯氨酸、超氧化物歧化酶(SOD)、过氧化物酶(POD)、相对电导率和过氧化氢酶(CAT)的变化情况。结果表明,随干旱胁迫程度加剧,3种披碱草幼苗根系的丙二醛、游离脯氨酸和相对电导率均呈上升趋势,而SOD、CAT和POD则表现为先降后升的变化。运用相关性分析及隶属函数法评价披碱草幼苗期抗旱性,得出披碱草新品系抗旱性强于垂穗披碱草和圆柱披碱草。The malondialdehyde,free proline,superoxide dismutase,peroxidase,relative electrical conductivity and catalase of three species of Elymus seedlings root were analyzed by pot seedling cultivation under drought stress.The results showed that malondialdehyde,free proline and relative electrical conductivity increased with the intensities of drought stress,while the superoxide dismutase,catalase and peroxidase decreased first and then increased.Correlation analysis and membership function method were used to evaluate the drought stress of Elymus species seedlings.The order of drought tolerance of Elymus species was:Elymus dahuricum Turcz>Elymus cylindricus(Franch.) Honda>Elymus nutans Griseb.

关 键 词：披碱草 幼苗期 根系 抗旱性 评价 

分 类 号：S543.034[农业科学—作物学]