[1]朱利君,陈剑,谢红英,等.外源硅通过介导抗氧化酶、H2O2和丙二醛促进镉胁迫下黄瓜种子萌发和幼苗生长[J].江苏农业科学,2025,53(18):159-164.
 Zhu Lijun,et al.Exogenous silicon promotes seed germination and seedling growth of Cucumis sativus L. under cadmium stress by regulating antioxidant enzymes,H2O2 and MDA[J].Jiangsu Agricultural Sciences,2025,53(18):159-164.
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外源硅通过介导抗氧化酶、H2O2和丙二醛促进镉胁迫下黄瓜种子萌发和幼苗生长()

《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第53卷
期数:
2025年第18期
页码:
159-164
栏目:
重金属胁迫
出版日期:
2025-09-20

文章信息/Info

Title:
Exogenous silicon promotes seed germination and seedling growth of Cucumis sativus L. under cadmium stress by regulating antioxidant enzymes,H2O2 and MDA
作者:
朱利君1陈剑2谢红英1起才凤1丁燕茹1蔡佶伶1虞琦1陈兰1陈红汐1张灿1
1.绵阳师范学院生命科学与技术学院,四川绵阳 621000; 2.绵阳师范学院基建处,四川绵阳 621000
Author(s):
Zhu Lijunet al
关键词:
黄瓜镉胁迫种子抗氧化酶
Keywords:
-
分类号:
S642.201
DOI:
-
文献标志码:
A
摘要:
镉(Cd)是一种环境污染物,Cd2+胁迫会影响种子的萌发。硅(Si)能激活重金属胁迫下植物体内的抗氧化酶。通过分析外源Si处理(硅酸钠,Si供体)对Cd2+胁迫下黄瓜种子的萌发性状、抗氧化酶活性、过氧化氢(H2O2)含量、丙二醛(MDA)含量的影响,明确Si对Cd2+胁迫下黄瓜种子萌发、幼苗生长的调控效应。以津瑞100黄瓜种子为材料,筛选出Cd2+胁迫浓度(150 mg/L Cd2+)及Si处理浓度(2 mmol/L NaSiO3)。设置CK(纯水对照)、Si处理(2 mmol/L NaSiO3)、Cd2+胁迫(150 mg/L NaSiO3)、Si+Cd2+处理(2 mmol/L NaSiO3+150 mg/L Cd2+)共4个处理,研究4个处理条件下黄瓜种子的发芽势、发芽率、抗氧化保护酶活性、H2O2含量、MDA含量。结果表明,150 mg/L Cd2+胁迫显著抑制黄瓜种子的萌发,发芽率、发芽势下降,胚根长度显著下降,H2O2、MDA含量显著增加,过氧化物酶(POD)活性升高,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。与150 mg/L Cd2+处理相比,2 mmol/L Na2SiO3浸种处理24 h显著提高黄瓜种子在Cd2+胁迫下的发芽势,促进胚根生长,增加SOD、POD、CAT、APX活性,降低H2O2、MDA含量。得出结论,Si可以通过提高黄瓜的抗氧化能力来缓解Cd2+胁迫对黄瓜种子萌发、胚根生长造成的抑制作用,并且以2 mmol/L Na2SiO3预处理的效果最佳;用Na2SiO3浸种处理,有利于黄瓜幼苗胚根生长,可应用于镉污染耕地黄瓜生产的播种前处理。
Abstract:
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备注/Memo

备注/Memo:
收稿日期:2024-08-19
基金项目:四川省自然科学基金(编号:2024NSFSC0401);绵阳师范学院一流本科课程项目(编号:Mnu-JY20135);绵阳师范学院高阶课程项目(编号:Mnu-JY240010);绵阳师范学院新工科、新农科、新文科研究与实践项目(编号:Mnu-JY250023);绵阳师范学院教学研究与改革项目(编号:Mnu-JY240173)。
作者简介:朱利君(1980—),女,四川资中人,博士,教授,从事植物生理与分子生物学方向的研究。E-mail:zhulijun211@163.com。
更新日期/Last Update: 2025-09-20