盐胁迫对不同品种甘薯幼苗根系的影响  

Effect of Salt Stress on the Root of Different Varieties of Dioscorea esculenta Seedlings

作　　者：廖乐琴 李婷 尉贇 刘乃榕 张利敏 张贺 龙伟 刘洪青 庞博 陈丰酆 朱洪庆 周全卢 李胜 康乐 Liao Leqin;Li Ting;Wei Yun;Liu Nairong;Zhang Limin;Zhang He;Long Wei;Liu Hongqing;Pang Bo;Chen Fengfeng;Zhu Hongqing;Zhou Quanlu;Li Sheng;Kang Le(Nanchong Key Laboratory of Ecological Environment Protection and Pollution Prevention in Jialing River Basin,College of Environmental Science and Engineering,China West Normal University,Nanchong 637000,Sichuan,China;Sweet Potato Research Institute,Nanchong Academy of Agricultural Sciences,Nanchong 637000,Sichuan,China)

机构地区：[1]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637000 [2]南充市农业科学院甘薯研究所,四川南充637000

出　　处：《绿色科技》2025年第5期83-89,共7页Journal of Green Science and Technology

基　　金：四川省科技厅项目(编号:2021YFYZ0019,2024NSFSC1216);国家甘薯产业技术体系项目(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)。

摘　　要：以27个甘薯品种为试验对象进行水培试验,通过测定不同品种甘薯地上部分干重、根系干重、根冠比、过氧化氢(H_(2)O_(2))含量、丙二醛(MDA)含量、可溶性蛋白含量和脯氨酸含量,采用相关性分析、主成分分析、隶属函数等方法对各品种根系耐盐性进行综合评价。结果表明:在盐胁迫下,不同甘薯品种根系均受到一定程度的影响,植株地上部分与根系干重均比对照组低;根冠比、H_(2)O_(2)含量和MDA含量均比对照组高;可溶性蛋白含量与脯氨酸含量则有升有降。运用相关性分析筛选出各指标间显著相关的耐盐指标,通过隶属函数综合评价得出D值,结果显示甘薯幼苗耐盐性较强的是‘绵紫薯9号’‘西充紫薯’‘南紫薯023’‘渝紫3号’‘渝33’;甘薯幼苗耐盐性较弱的是‘漯紫薯10号’‘南渝薯022’‘万紫9号’‘渝薯1号’‘济薯15’。本研究通过综合评价甘薯幼苗根系耐盐性,使用系统聚类将27个甘薯品种分划分成3种类型:耐盐型、中间型和盐敏感型。A hydroponic experiment was conducted with 27 Dioscorea esculenta varieties as the experimental objects.By measuring the dry weight of the above-ground parts,root dry weight,the root-shoot ratio,the content of hydrogen peroxide(H_(2)O_(2)),the content of malondialdehyde(MDA),the content of soluble protein,and the content of proline of different varieties,methods such as correlation analysis,principal component analysis,and membership function were used to comprehensively evaluate the salt tolerance of the roots of each variety.The results showed that under salt stress,the roots of different Dioscorea esculenta varieties were affected to a certain extent.The dry weights of the above-ground parts and roots of the plants were lower than those of the control group.The root-shoot ratio,H_(2)O_(2) content,and MDA content were higher than those of the control group.The contents of soluble protein and proline either increased or decreased.Salt-tolerant indicators with significant correlations among various indicators were screened out through correlation analysis,and the D-value was obtained through comprehensive evaluation using the membership function.The results showed that the varieties with stronger salt tolerance were Mianzishu 9,Xichongzishu,Nan Zishu 023,Yuzishu 3,and Yu 33,while those with weaker salt stress were Luo Zishu 10,Nanyushu 022,Wan Zishu 9,Yushu 1,and Jishu 15.In this study,through the comprehensive evaluation of salt tolerance in Dioscorea esculenta seedling roots,the 27 Dioscorea esculenta varieties were classified into salt-tolerant type,intermediate type,and salt-sensitive type using hierarchical clustering.

关 键 词：甘薯 幼苗 根系 耐盐性 综合评价 

分 类 号：S531[农业科学—作物学]