施硒对人参菜生长及生理特性的影响  

Effect of Selenium Application on the Growth and Physiological Characteristics of Talinum paniculatum (Jacq.) Gaertn

作　　者：仰路希 谢永东[1] 贺忠群[1] YANG Luxi;XIE Yongdong;HE Zhongqun(College of Horticulture,Sichuan Agricultural University,Chengdu 611130,China)

机构地区：[1]四川农业大学园艺学院

出　　处：《西北植物学报》2019年第9期1636-1641,共6页Acta Botanica Boreali-Occidentalia Sinica

基　　金：雅安雨城区项目(063H0201)

摘　　要：为研究施硒对人参菜生长的影响并培育富硒人参菜,采用盆栽试验,测定了施硒(0、2.5、5、10、20 mg/kg)对人参菜生长、叶片光合色素含量、生理特性以及硒积累的变化情况。结果显示:(1)施硒对人参菜生长有“低促高抑”的影响,人参菜的株高、茎粗、根长、分支数、生物量均呈先升高后降低的趋势。(2)施硒能增加人参菜叶片中光合色素的含量,其中高浓度硒(≥10 mg/kg)对人参菜叶片中光合色素含量影响显著。(3)人参菜叶片SOD、POD活性在硒浓度为2.5 mg/kg时最高(P<0.05),CAT活性在硒浓度为5 mg/kg时最高(P<0.05);随着硒浓度的增加,人参菜叶片中维生素C含量逐渐升高,可溶性蛋白含量先升后降,可溶性糖含量下降。(4)人参菜中硒含量的分布表现为:根>叶>茎,且随硒浓度升高而升高,表明人参菜根系是硒积累的主要部位。研究认为,硒浓度为5 mg/kg是培育富硒人参菜的最佳浓度。To study the effect of selenium on the growth of ginseng and cultivate selenium-enriched Talinum paniculatum,we conducted pot experiment to determine the changes of T.paniculatum growth,leaf photosynthetic pigment content,physiological characteristics and selenium accumulation with selenium application(0,2.5,5,10,20 mg/kg).The results showed that:(1)selenium application had the effect of“low promotion and high inhibition”on the growth of T.paniculatum.The plant height,stem diameter,root length,number of branches and biomass of T.paniculatum increased first and then decreased.(2)Selenium application can increase the content of photosynthetic pigment in T.paniculatum leaves,and high concentration selenium(≥10 mg/kg)has significant effects on photosynthetic pigment content in T.paniculatum leaves.(3)The SOD and POD activities of T.paniculatum leaves were the highest at the concentration of 2.5 mg/kg(P<0.05),and the highest at CAT activity was 5 mg/kg(P<0.05).With the increase of selenium concentration,the content of vitamin C in the leaves of T.paniculatum increased gradually,the content of soluble protein increased first and then decreased,and the content of soluble sugar decreased.(4)The distribution of selenium in T.paniculatum was:root>leaf>stem,and it increased with the increase of selenium application;T.paniculatum root was the main part of selenium accumulation.According to the study,the concentration of selenium is 5 mg/kg,which is the best concentration for cultivating selenium-enriched T.paniculatum.

关 键 词：人参菜 硒 生长 生理特性 

分 类 号：Q945.12[生物学—植物学]