油菜砧木对荠菜嫁接后代镉积累的影响  

Effects of Rape Rootstock on Cadmium Accumulation Characteristics of Capsella bursa-pastoris Post-grafting Generation

作　　者：林立金[1,2] 罗丽[1] 张潇[1] 杨代宇 廖明安[1] 汤福义[1] 

机构地区：[1]四川农业大学园艺学院,四川雅安625014 [2]雅安水土保持生态环境监测分站,四川雅安625000

出　　处：《华北农学报》2015年第1期207-212,共6页Acta Agriculturae Boreali-Sinica

基　　金：国家农业科技成果转化资金项目(2011GB2F000006)

摘　　要：为研究嫁接对富集植物后代镉积累的影响,通过盆栽试验和小区试验,研究了油菜作为砧木对荠菜嫁接后代镉积累的影响。结果表明:在土壤高浓度镉处理、低浓度镉处理及小区试验条件下,荠菜根系镉含量及根系富集系数大小顺序均为:未嫁接>自苗嫁接后代>油菜砧木嫁接后代,而荠菜地上部分镉含量、地上部分富集系数、转运系数、根系生物量、地上部分生物量、总生物量、根系镉积累量、地上部分镉积累量和镉积累总量的大小顺序为:油菜砧木嫁接后代>自苗嫁接后代>未嫁接。在高浓度镉处理、低浓度镉处理和小区试验条件下,油菜砧木嫁接后代的荠菜地上部分镉积累量较未嫁接分别提高了145.41%,98.27%,99.51%,镉积累总量较未嫁接分别提高了110.93%,82.90%,93.89%。在小区试验条件下,油菜砧木嫁接后代的荠菜地上部分镉积累量和镉积累总量分别为1 103.87,1 210.54μg/m2。因此,以油菜作为砧木嫁接荠菜能明显提高其后代对镉的积累,可在植物修复中推广应用。To study the cadmium accumulation characteristics of post-grafting accumulator generation , the pot and field experiments were conducted to study the effects of rape rootstock on cadmium accumulation characteristics of Capsella bursa-pastoris post-grafting generation .The results showed that under high concentration of cadmium treatment,low concentration of cadmium treatment and field experiment ,the cadmium content in root and the root bioconcentration factor of C.bursa-pastoris were ungrafted〉self grafted generation 〉rape rootstock grafted genera-tion.However,the cadmium content in shoot,root bioconcentration factor,transfer factor,root biomass,shoot bio-mass,total biomass,cadmium accumulation in root ,cadmium accumulation in shoot and total cadmium accumulation of C.bursa-pastoris were rape rootstock grafted generation 〉self grafted generation〉ungrafted.At high concentration of cadmium treatment ,low concentration of cadmium treatment and field experiment ,the rape rootstock grafted gen-eration of C.bursa-pastoris accumulated cadmium in shoot by 145.41%,98.27%and 99.51%higher than ungraft-ed,and the total amount of cadmium improved by 110.93%,82.90%,93.89% compared with ungrafted.In the field experiment ,the cadmium accumulations in shoot and whole plant of the rape rootstock grafted generation of C. bursa-pastoris were 1 103.87,1 210.54 μg/m2,respectively.Therefore,the rape as rootstocks grafting C.bursa-pas-toris can significantly improve the cadmium accumulation in generation of C.bursa-pastoris, and can apply in the phytoremediation .

关 键 词：荠菜 油菜 砧木 嫁接后代 镉 积累 

分 类 号：X503[环境科学与工程—环境工程] S616[农业科学—园艺学]