湖北农业科学 ›› 2022, Vol. 61 ›› Issue (15): 10-14.doi: 10.14088/j.cnki.issn0439-8114.2022.15.002

• 育种·栽培 • 上一篇    下一篇

盐胁迫对玉米苗期光合性能和保护酶活性的影响

张军, 戈丹, 刘玉, 沈杏玉, 李甜   

  1. 商洛学院生物医药与食品工程学院,陕西 商洛 726000
  • 收稿日期:2021-03-11 出版日期:2022-08-10 发布日期:2022-08-25
  • 作者简介:张 军(1987-),男,陕西陇县人,讲师,主要从事作物遗传育种研究,(电话)15191690596(电子信箱)bjzhangjun@126.com。
  • 基金资助:
    2017年国家级大学生创新创业训练计划项目(201711396008)

Effects of salt stress on photosynthetic performance and protective enzyme activities of corn at seedling stage

ZHANG Jun, GE Dan, LIU Yu, SHEN Xing-yu, LI Tian   

  1. School of Biomedicine and Food Engineering, Shangluo University, Shangluo 726000, Shaanxi, China
  • Received:2021-03-11 Online:2022-08-10 Published:2022-08-25

摘要: 采用不同浓度NaCl(0、50、100、150 mmol/L)模拟盐胁迫,测定光合性能和保护酶活性指标,基于各指标的耐盐系数,利用加权隶属函数法对商洛市主栽玉米品种苗期耐盐性进行综合评价。结果表明,随着盐浓度的增加,净光合速率(Pn)、气孔导度(GS)和蒸腾速率(Tr)呈下降趋势;胞间CO2浓度(Ci)呈增加趋势;SOD、POD和CAT活性则先升高后降低。基于综合D值,供试品种苗期耐盐性为登海11>正大658>秦鑫1708>安森7号>万瑞6号>兆玉951。研究结果可为商洛市玉米种植品种的选用提供参考。

关键词: 玉米, 苗期, 光合性能, 保护酶活性, 耐盐性

Abstract: Using different concentrations of NaCl (0, 50, 100 and 150 mmol/L) to simulate salt stress, the indexes of photosynthetic performance and protective enzyme activity were measured. Based on the salt tolerance coefficient of each index, the salt tolerance of the main corn varieties in Shangluo was conprehensively evaluated by using the weighted membership function method. The results showed that,with the increase of salt comcentration, the net photosynthetic rate (Pn), stomatal conductance (GS) and transpiration rate (Tr) showed a decreasing trend; the intercellular CO2 concentration (Ci) showed an increasing trend; SOD, POD and CAT activity increased first and then decreased. Based on the comprehensive D value, the salt tolerance of the tested varieties at seedling stage was Denghai 11> Zhengda 658> Qinxin 1708> Ansen 7> Wanrui 6> Zhaoyu951. The research results could provide reference for the selection of Shangluo corn varieties.

Key words: corn, seedling stage, photosynthetic performance, protective enzyme activity, salt tolerance

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