喷施脱落酸对镉富集植物繁缕生长及其镉积累的影响  

Effects of Spraying Abscisic Acid on Growth and Cadmium Accumulation in Accumulator Plant Stellaria media

作　　者：马倩倩[1] 刘春阳[1] 石军 林立金[3] 廖明安[1] 何静[1] 钟程操 黄佳璟 温铿 

机构地区：[1]四川农业大学园艺学院,四川成都611130 [2]绵阳市农业科学研究院,四川绵阳621023 [3]四川农业大学果蔬研究所,四川成都611130

出　　处：《土壤通报》2016年第4期992-997,共6页Chinese Journal of Soil Science

基　　金：国家农业科技成果转化资金项目(2011GB2F000006)资助

摘　　要：盆栽试验研究了镉胁迫条件下喷施脱落酸(ABA)对富集植物繁缕(Stellaria media)生长及镉积累的影响。结果表明,喷施ABA提高了繁缕生物量及光合色素含量。随ABA喷施浓度的增加,繁缕的生物量及光合色素含量呈增加的趋势,但繁缕的镉含量、镉积累量、抗氧化酶(SOD、POD和CAT)活性、可溶性蛋白含量及可溶性糖含量呈先增后降的趋势,最大值出现在ABA浓度为15 mg L-1,此时,繁缕根系、地上部分及整株镉积累量均达到最大值,分别为94.54、235.93和330.47μg plant-1,较各自对照分别增加了19.07%(P<0.05)、49.45%(P<0.05)和39.28%(P<0.05)。喷施ABA能够促进繁缕的生长,提高繁缕对镉的富集能力,以15 mg L-1的ABA浓度为最佳。A pot experiment was con ducted to study the effects of spraying abscisic acid （ABA） on growth and cadmium accumulation in accumulator plant Stellaria media under cadmium stress. The results showed that spraying ABA improved the biomass and photosynthetic pigment content of S. media. With increase in ABA spraying concentrations, the biomass and photosynthetic pigment content of S. media increased, but the cadmium content, cadmium accumulation, antioxidant enzyme （SOD, POD and CAT） activity, soluble protein content and soluble sugar content of S. media increased at first and then decreased over time. When ABA concentration was 15 mg L-1, the cadmium accumulation amounts in root, shoot and whole plant of S. media reached the maximums of 94.54, 235.93 and 330.47ug plant-1, respectively, which increased by 19.07% （P 〈 0.05）, 49.45% （P 〈 0.05） and 39.28% （P 〈 0.05） compared with the respective control. Therefore, spraying ABA, especially at concentration of 15 mg L-1, promoted the growth of S. media and increased cadmium accumulation ability in S. media.

关 键 词：脱落酸(ABA) 繁缕 镉 生长 富集植物 

分 类 号：X53[环境科学与工程—环境工程] Q946.885.6[生物学—植物学]