一种过氧化氢清除剂对铜胁迫下黄瓜种子萌发的影响  

Effects of A Hydrogen Peroxide Scavenger on Seed Germination of Cucumber under Copper Stress

作　　者：李鑫 罗安才[1] Li Xin(Collage of Life Sciences,Chongqing Normal University,Chongqing 401331)

机构地区：[1]重庆师范大学生命科学学院,重庆401331

出　　处：《农业灾害研究》2023年第9期46-48,共3页Journal of Agricultural Catastrophology

摘　　要：二甲基硫脲(Dimethylthiourea,DMTU)是一种H2O2清除剂,为了探究DMTU对铜胁迫下黄瓜种子萌发的影响,以黄瓜种子“津瑞100”为材料,采用纸上发芽法,测定了0.5 mmol/L DMTU浸种处理对90 mg/L CuSO_(4)胁迫下黄瓜种子萌发及相关生理指标的影响。结果表明:在90 mg/L CuSO_(4)胁迫下,黄瓜种子的发芽势、发芽率和胚根长均受到抑制;经过0.5 mmol/L DMTU浸种后,黄瓜种子的发芽率和发芽势显著提高,促进了胚根生长;降低了种子H_(2)O_(2)含量和抗氧化酶(POD、APX)的活性,减轻了铜胁迫下对黄瓜种子萌发的影响。Dimethylthiourea(DMTU)is an H2O2 scavenger.In order to investigate the effect of DMTU on cucumber seed germination under copper stress,the cucumber seed“Jinrui 100”was used as the material.The paper germination method was used to determine the effect of soaking with 0.5 mmol/L DMTU on cucumber seed germination and related physiological indicators under 90 mg/L CuSO_(4) stress.The results showed that under the stress of 90 mg/L CuSO_(4),the germination potential,germination rate,and radicle length of cucumber seeds were inhibited;After soaking with 0.5 mmol/L DMTU,the germination rate and germination potential of cucumber seeds were significantly increased,promoting the growth of embryonic roots;Reducing the content of H_(2)O_(2) in seeds and the activity of antioxidant enzymes(POD,APX)alleviated the impact of copper stress on cucumber seed germination.

关 键 词：黄瓜 铜胁迫 DMTU 抗氧化酶 

分 类 号：S682.32[农业科学—观赏园艺]