[1]刘乃榕,刘慧敏,廖乐琴,等.3种外源添加剂对甘薯幼苗镉胁迫的缓解效应及机理研究[J].江苏农业科学,2026,54(16):293-302.
　Liu Nairong,et al.Alleviation effect and mechanism of three exogenous additives on cadmium stress of sweet potato seedlings[J].Jiangsu Agricultural Sciences,2026,54(16):293-302.
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3种外源添加剂对甘薯幼苗镉胁迫的缓解效应及机理研究()

《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第54卷
期数:
2026年第16期
页码:
293-302
栏目:
农业资源与环境
出版日期:
2026-08-20

文章信息/Info

Title:
Alleviation effect and mechanism of three exogenous additives on cadmium stress of sweet potato seedlings
作者:
刘乃榕; 刘慧敏; 廖乐琴; 尉贇; 郑柯骥; 杨茂艺; 王云龙; 王子豪; 李婷; 康乐
西华师范大学环境科学与工程学院/嘉陵江流域生态环境保护与污染防治南充市重点实验室，四川南充 637002
Author(s):
Liu Nairong; et al
关键词:
甘薯; 镉胁迫; 抗氧化; 外源添加剂; 生态修复
Keywords:
-
分类号:
X173；S531.01
DOI:
-
文献标志码:
A
摘要:
为探究外源添加剂对镉(Cd)胁迫下甘薯幼苗的缓解效应及其内在机制，以耐镉型万薯9号和镉敏感型南紫薯023为试验材料，通过水培试验分析外源CaCl2(10 mmol/L)、ABA(70 μmol/L)和NaHS(100 μmol/L)对Cd胁迫(450 μmol/L)下甘薯幼苗抗氧化系统、渗透调节能力、膜脂过氧化及DPPH清除率的影响。结果表明，Cd胁迫显著抑制了甘薯幼苗的生长，万薯9号、南紫薯023镉胁迫组叶绿素含量分别平均下降了5.82%、16.61%、类胡萝卜素含量平均下降12.99%、95.17%，MDA含量平均升高24.94%、49.49%，H2O2含量平均升高17.42%、54.00%，且镉敏感型品种南紫薯023受损更为严重；外源添加CaCl2、ABA和NaHS通过提升抗氧化酶活性(万薯9号、南紫薯023 SOD活性分别平均增加32.71%~71.72%、15.67~45.37%，CAT活性分别平均增加42.18%~59.66%、24.00%~5104%)、渗透调节物质含量(万薯9号、南紫薯023脯氨酸含量分别平均增加16.32%~25.43%、40.18%~6675%)及DPPH自由基清除率(万薯9号、南紫薯023分别平均增加12.54%~13.55%%、2.63%~23.29％)，显著降低了氧化损伤标志物MDA含量，其中NaHS对镉敏感型品种的修复效果最优；主成分分析和隶属函数综合评价显示，NaHS处理使敏感型南紫薯023的综合抗性指数(D值)达0.984，较ABA和CaCl2分别提高了47.3%、47.7%，且通过激活APX活性(增加56.62%)和促进花青素合成(增加127.32%)进一步增强了抗氧化能力；而耐镉型万薯9号因固有抗性较强，3种添加剂效果趋于一致(D值差值<0.02)。本研究证实NaHS可作为镉敏感型甘薯的高效修复剂，为Cd污染土壤的生态修复提供了理论依据与技术参考。
Abstract:
-

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备注/Memo

备注/Memo:
收稿日期：2025-06-11
基金项目：四川省农作物及畜禽育种攻关项目(编号：2021YFYZ0019)；四川省自然科学青年基金(编号：2024NSFSC1216)；国家甘薯产业技术体系建设专项(编号：CARS-10-GW13、CARS-10-SYX12)；西华师范大学博士启动项目(编号：19E057)；西华师范大学校级项目(编号：20A019)。
作者简介：刘乃榕(2000—)，女，重庆人，硕士研究生，从事甘薯的非生物胁迫研究。E-mail：liunairong7731@163.com。
通信作者：李婷，讲师，从事旱地作物高产高效栽培、土壤污染修复研究，E-mail：tingting93@cwnu.edu.cn；康乐，副教授，硕士生导师，从事植物逆境响应及抗性机制研究，E-mail：kangle@cwnu.cdu.cn。
更新日期/Last Update: 2026-08-20