摘要
采用盆栽试验,研究了外源一氧化氮(NO)处理对干旱条件下刺槐幼苗抗氧化特性的影响。结果表明,与正常水分(田间持水量的75%~80%)处理相比,干旱胁迫(田间持水量的45%~55%)处理显著提高了刺槐幼苗叶片的超氧化物歧化酶(SOD)和过氧化物酶(POD)活性、还原型抗坏血酸(AsA)和还原型谷胱甘肽(GSH)含量、相对电导率和丙二醛(MDA)含量,增幅分别为33.3%、175%、31.4%、38%、150%和101.6%。与干旱胁迫处理相比,100μmol/L硝普钠(SNP)+干旱处理显著提高了刺槐幼苗叶片的SOD和POD活性、AsA和GSH含量,增幅分别为20%、81.8%、19.6%、27.5%,显著降低了相对电导率和MDA含量,降幅分别为32%、27.2%。这表明,外源NO处理可以缓解干旱胁迫对刺槐幼苗所造成的伤害。
This paper dealt with effects of exogenous nitric oxide on the antioxidant properties of Robinia pseudoacacia L. leaves under drought stress. The results showed that drought stress (45%-55% field capacity) significantly increased the activities of SOD(33.3%) and POD (175%),the contents of AsA(31.4%) and GSH(38%),and the permeability of plasma mem-brane(150%) and MDA content (101.6%),compared with normal water treatment(75%-80% field capacity). The treatment of 100 μmol/L SNP and drought significantly increased the activi-ties of SOD(20%) and POD(81.8%),and the contents of AsA(19.6%) and GSH (27.5%),and significantly decreased the permeability of plasma membrane(32%) and MDA content(27.2%). In conclusion,exogenous nitric oxide could alleviate the injury caused by drought stress.
出处
《河南农业科学》
CSCD
北大核心
2012年第11期129-131,共3页
Journal of Henan Agricultural Sciences
基金
河南省教育厅自然科学研究计划项目(2011A210008)
关键词
干旱胁迫
刺槐
一氧化氮
幼苗
抗氧化特性
drought stress
Robinia pseudoacacia L.
nitric oxide
seedling
antioxidant properties