基于Na^(+)、K^(+)相关指标动态监测玉米苗期盐碱胁迫伤害  

Dynamic Monitoring Saline-alkali Stress Injury Based on Na^(+)and K^(+)Related Indexes at Maize Seedling Stage

作　　者：孙博 张春宵[1] 刘俊宇[1,2] 董菁 金峰学 刘学岩[1] 石创业 吴松权 李晓辉[1] SUN Bo;ZHANG Chun-xiao;LIU Jun-yu;DONG Jing;JIN Feng-xue;LIU Xue-yan;SHI Chuang-ye;WU Song-quan;LI Xiao-hui(Maize Research Institute,Jilin Academy of Agricultural Sciences,Gongzhuling 136100;Agricultural College,Yanbian University,Yanji 133002,China)

机构地区：[1]吉林省农业科学院玉米研究所,吉林公主岭136100 [2]延边大学农学院,吉林延吉133002

出　　处：《玉米科学》2025年第1期46-55,共10页Journal of Maize Sciences

基　　金：吉林省农业科技创新工程创新团队项目(CXGC2023DX001);吉林省科技发展计划项目(20220202015NC)。

摘　　要：以3份玉米单交种(郑单958、先玉335、吉单27)及其双亲(郑58/昌7-2、PH6WC/PH4CV、四-287/四-144)为试验材料,分别用NaCl 200 mmol/L和Na_(2)CO_(3)100 mmol/L对其进行苗期盐、碱胁迫处理,在10个时间点监测苗情和测定Na^(+)和K^(+)含量、Na^(+)/K^(+)比。通过方差分析和相关性分析,探究盐碱胁迫对玉米的影响,并筛选耐盐性评价指标和时间点,对材料进行耐盐性综合分级。结果表明,玉米单交种整体的耐盐性明显高于自交系。碱与盐胁迫下K^(+)相当,Na^(+)差异较大,说明K^(+)与Na^(+)吸收、运输独立,表明盐、碱胁迫性质不同。鉴于Na^(+)、K^(+)相关指标变化具有明显的阶段分化特征,将全部胁迫点划分为3个阶段,将胁迫后1、3和5 d确立为玉米苗期耐盐碱鉴定适宜的胁迫时间点,Na^(+)/K^(+)比为适宜评价指标。Using three maize hybrids(Zhengdan958,Xianyu335,Jidan 27)and their parental lines(Zheng 58/Chang7-2,PH6WC/PH4CV,Si-287/Si-144)as experimental materials,they were subjected to salt-alkali stress treatments during the seedling stage using 200 mmol/L NaCl and 100 mmol/L Na_(2)CO_(3),respectively.Seedling growth was monitored,and the Na^(+)and K^(+)contents,as well as the Na^(+)/K^(+)ratio,were measured at 10 different time points.Through variance analysis and correlation analysis,the impact of salt-alkali stress on maize was explored,and salt tolerance evaluation indices and time points were selected for comprehensive classification of salt tolerance.The results showed that the overall salt tolerance of the maize hybrids was significantly higher than that of the inbred lines.Under salt-alkali stress,the K^(+)levels remained similar while Na^(+)levels showed significant differences,indicating that the absorption and transportation of K^(+)and Na^(+)are independent processes,suggesting that salt-alkali stress are of different natures.Given the obvious phased changes in Na^(+)and K^(+)-related indicators,all stress points were divided into three stages,and the 1st day,3rd day,and 5th day after stress application were identified as suitable time points for evaluating salt-alkali tolerance in maize seedlings.The Na^(+)/K^(+)ratio was established as an appropriate evaluation index.

关 键 词：玉米 盐碱胁迫 Na^(+)含量、K^(+)含量 Na^(+)/K^(+)比 

分 类 号：S513.01[农业科学—作物学]