外源NO对镉胁迫下大豆幼苗生理特性的影响  

Effects of Exogenous NO on Seedling Physiological Characteristics of Soybean under Cadmium Stress

作　　者：杨玉花 白志元 张瑞军 卫保国 YANG Yuhua;BAI Zhiyuan;ZHANG Ruijun;WEI Baoguo(Agricultural Genetic Resources Research Center,Shanxi Agricultural University(Institute of Crop Germplasm Resources,Shanxi Academy of Agricultural Sciences),Taiyuan 030031,China)

机构地区：[1]山西农业大学农业基因资源研究中心(山西省农业科学院农作物品种资源研究所),山西太原030031

出　　处：《山西农业科学》2020年第9期1406-1410,共5页Journal of Shanxi Agricultural Sciences

基　　金：国家重点研发计划项目(2016YFD0101500,2016YFD0101504);山西省青年基金项目(201901D211563);山西省农业科学院博士后基金项目(YCX2020BH4);山西省农业科学院博士研究基金项目(YBSJJ1706)。

摘　　要：为探究外源NO对大豆镉胁迫的缓解作用,以高浓度镉胁迫(0.5 mmol/L)下的大豆品种晋豆48号为试验材料,以外源硝普钠(SNP)为NO供体材料,研究不同浓度SNP(0、50、100、150、200、300μmol/L)对镉胁迫下大豆幼苗期生理特性的影响。结果表明,高浓度镉离子对大豆生长有严重抑制作用,施加100μmol/L SNP能够促进大豆幼苗生长,增加大豆幼苗光合色素含量,提高过氧化物酶(POD)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)活性,降低根尖的O2-产生速率和H2O2含量。适宜浓度的NO可有效缓解镉胁迫对大豆幼苗的毒害。To explore the relieving effect of exogenous NO on cadmium stress in soybean,the soybean variety Jindou 48 under severe cadmium stress(0.5 mmol/L)was used as experimental material,and different concentrations of SNP(0,50,100,150,200,300μmol/L)were used as NO donors.The effects of different concentrations of SNP on physiological characteristics of soybean seedlings under cadmium stress were studied.The results showed that high concentration of cadmium ions had a serious inhibitory effect on soybean growth.Applying 100μmol/L SNP could promote the growth of soybean seedlings,increase photosynthetic pigment content and the activity of peroxidase(POD),superoxide dismutase(SOD),catalase(CAT)and ascorbate peroxidase(APX),decrease O2-production rate and H2O2 content.The results indicated that the appropriate concentration of NO could effectively alleviate the toxicity of cadmium stress to soybean seedlings.

关 键 词：镉胁迫 一氧化氮 大豆 生理特性 

分 类 号：S565.1[农业科学—作物学]