湖北农业科学 ›› 2021, Vol. 60 ›› Issue (13): 82-86.doi: 10.14088/j.cnki.issn0439-8114.2021.13.016

• 园艺·特产 • 上一篇    下一篇

硅和硒复配剂对低温胁迫下铁皮石斛抗寒性的影响

丁久玲, 郑凯, 唐冬芬, 席刚俊, 史俊   

  1. 江苏农林职业技术学院,江苏 句容 212400
  • 收稿日期:2020-09-24 出版日期:2021-07-10 发布日期:2021-07-26
  • 通讯作者: 郑 凯(1980-),男,陕西西安人,副研究员,主要从事植物资源收集及快繁方面的研究,(电话)13913403136(电子信箱)78056829@qq.com。
  • 作者简介:丁久玲(1978-),女,河南许昌人,副研究员,硕士,主要从事园林植物的应用及植物抗性生理方面的研究,(电话)13776371012(电子信箱)317569479@qq.com。
  • 基金资助:
    江苏省镇江市重点研发计划-现代农业项目“林药复合种植模式的研究及产业化开发”(NY2019007); 中央财政林业科技推广示范基金项目“药用植物林下立体栽培技术示范与推广”(苏[2019]TG05); 江苏现代农业(特粮特经-中药材)产业技术体系句容推广示范基地项目(JATS[2019]359)

Effects of silicon and selenium on cold resistance of Dendrobium candidum in low temperature stress

DING Jiu-ling, ZHENG Kai, TANG Dong-fen, XI Gang-jun, SHI Jun   

  1. Jiangsu Vocational College of Agriculture and Forestry,Jurong 212400,Jiangsu,China
  • Received:2020-09-24 Online:2021-07-10 Published:2021-07-26

摘要: 为研究低温胁迫下硅和硒复配剂处理对铁皮石斛(Dendrobium candidum)抗寒性的影响,将铁皮石斛幼苗2 ℃低温胁迫7 d后,用不同浓度的硅和硒复配剂进行叶面喷施,共12种复配剂处理。结果表明,低温胁迫下硅和硒配合使用,才可以在一定程度上减缓铁皮石斛的低温伤害,具体表现为叶绿素含量和Pro含量的增加,SOD、POD和CAT活性增强,MDA含量下降;喷施浓度为50 mg/L硅+5 mg/L硒、50 mg/L硅+7.5 mg/L硒复配剂时,其叶绿素含量、Pro含量、抗氧化酶活性均显著增加,MDA含量显著下降,显著减缓了铁皮石斛的低温伤害,提高了其抗寒性。

关键词: 铁皮石斛(Dendrobium candidum), 低温胁迫, 硅和硒复配剂, 抗寒性

Abstract: To explore the effects of silicon and selenium on cold resistance of Dendrobium candidum in low temperature stress, this study is based on Dendrobium candidum seedlings as experimental material, the stress of low temperature 2 ℃ after 7 d, with different concentrations of exogenous silicon and selenium compound spraying on the leaf. The silicon and selenium were all set up 12 kinds of complex dispensing. The results showed that silicon and selenium should be used together in low temperature stress, which was reflected in the increase of chlorophyll content and Pro content, the increase of POD, SOD and CAT activity, and the decrease of MDA content. This indicated that silicon and selenium treatment(50 mg/L silicon+5 mg/L selenium, 50 mg/L silicon+7.5 mg/L selenium) could increase the cold resistance of Dendrobium candidum seedlings, which was achieved by means of enhancing the anti-oxidative enzyme activities, chlorophyll content and Pro content, and decreasing the MDA content to reduce injury of low temperature stress.

Key words: Dendrobium candidum, low temperature stress, compound of silicon and selenium, cold resistance

中图分类号: