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。
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.
作者
丁久玲
郑凯
唐冬芬
席刚俊
史俊
DING Jiu-ling;ZHENG Kai;TANG Dong-fen;XI Gang-jun;SHI Jun(Jiangsu Vocational College of Agriculture and Forestry,Jurong212400,Jiangsu,China)
出处
《湖北农业科学》
2021年第13期82-86,92,共6页
Hubei Agricultural Sciences
基金
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)。
