摘要
通过盆栽试验研究了接种不同浓度肠杆菌对镉-砷复合污染土壤上蓼科植物水蓼(Polygonum hydropiper L.)和酸模叶蓼(Polygonum lapathifolium L.)生长、镉砷富集及抗氧化酶系统和非酶系统的影响。结果发现:接种肠杆菌显著提高水蓼和酸模叶蓼株高、株质量及叶片中叶绿素和类胡萝卜素的含量。当接种浓度为3.4×107CFU g-1土时,水蓼和酸模叶蓼根际土壤pH降低了0.35个和0.28个单位,根茎叶中的镉和砷含量分别为对照的1.64~2.74倍和1.21~2.51倍。接种肠杆菌还可以提高叶片中SOD、POD和CAT的活性以及GSH和PCs的含量,降低O-2和MDA的含量,缓解重金属的毒害。结果表明,接种肠杆菌能通过提高植株抗氧化酶活性来减轻镉砷富集对水蓼和酸模叶蓼的胁迫,从而提高水蓼和酸模叶蓼对镉-砷复合污染土壤的修复效率。
We conducted this study to investigate the effects of different Enterobacter sp.FM-1 inoculation levels on the growth,phytoreme⁃diation of cadmium and arsenic,antioxidant enzymatic system,and non-enzymatic system by Polygonaceae plants(Polygonum hydropiper L.and Polygonum lapathifolium L.)in cadmium-arsenic co-contaminated soil.The results indicated inoculation with Enterobacter sp.FM-1 promoted the growth of both plants.Furthermore,there were increased contents of chlorophyll and carotenoids in the leaves of Polyg⁃onum hydropiper L.and Polygonum lapathifolium L.Inoculation with Enterobacter sp.FM-1(3.4×107 CFU·g-1soil)decreased rhizospher⁃ic soil pH.For both Polygonum hydropiper L.and Polygonum lapathifolium L.,compared to that of the uninoculated control,the soil pH val⁃ue decreased by 0.35 and 0.28,respectively.The content of cadmium and arsenic in the roots,stems,and leaves of the two plants increased 1.64~2.74 times and 1.21~2.51 times,respectively.Additionally,inoculation with Enterobacter sp.could not only increase the content of SOD,POD,and CAT in the leaves of Polygonum hydropiper L.and Polygonum lapathifolium L.,but also increased the content of GSH and PCs.Moreover,the content of O-2·and MDA were effectively decreased.Our findings indicated that inoculation with Enterobacter sp.FM-1 helped plants alleviate heavy metal poisoning by increasing the activity of antioxidant enzymes.Hence,Enterobacter sp.FM-1 is potential⁃ly useful for cadmium and arsenic phytoremediation in cadmium-arsenic co-contaminated soil by Polygonum hydropiper L.and Polygo⁃num lapathifolium L..
作者
李艺
王炳森
黄媛媛
姚亚威
林嘉敏
刘可慧
于方明
LI Yi;WANG Bing-sen;HUANG Yuan-yuan;YAO Ya-wei;LIN Jia-min;LIU Ke-hui;YU Fang-ming(Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection,Ministry of Education,Guilin 541004,China;College of Environment and Resource,Guangxi Normal University,Guilin 541004,China;College of Life Science,Guangxi Normal Uni⁃versity,Guilin 541004,China)
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2020年第2期304-312,共9页
Journal of Agro-Environment Science
基金
国家自然科学基金项目(41967019,41907096,41661077)
国家重点研发计划项目(2017YFD0801500)
广西创新驱动发展专项项目(桂科AA17204047-3)
广西自然科学基金项目(2018JJA150018)~~
关键词
水蓼
酸模叶蓼
肠杆菌
镉
砷
Polygonum hydropiper L.
Polygonum lapathifolium L.
Enterobacter sp.FM-1
cadmium
arsenic
