生物技术通报 ›› 2017, Vol. 33 ›› Issue (10): 156-162.doi: 10.13560/j.cnki.biotech.bull.1985.2017-0587

• 研究报告 • 上一篇    下一篇

一株抗锌菌的分离鉴定及其对印度芥菜修复锌污染土壤的影响

陈徉1, 宋天顺2, 周国玲1, 谢婧婧2   

  1. 1. 常州市生物技术发展中心,常州 213131
    2. 南京工业大学生物与制药工程学院,南京 211816
  • 收稿日期:2017-07-13 出版日期:2017-10-29 发布日期:2017-10-29
  • 作者简介:陈徉,男,硕士,研究方向:环境微生物;E-mail:chenyang0920@163.com
  • 基金资助:

    江苏省高校自然科学研究重大项目(15KJA530002)

Isolation and Identification of a Zinc-resistant Strain and Effect of Its Characteristics on the Remediation Efficiency of Brassica juncea in Zinc-polluted Soil

CHEN Yang1, SONG Tian-shun2, ZHOU Guo-ling1, XIE Jing-jing2   

  1. 1. Changzhou Centre for Biotech Development,Changzhou 213131
    2. College of Life Science and Pharmaceutical Engineering,Nanjing Tech University,Nanjing 211816
  • Received:2017-07-13 Published:2017-10-29 Online:2017-10-29

摘要:

从受重金属污染土壤中筛选得到1株对锌有较高抗性的微生物,经鉴定该菌株为芽孢杆菌属。在不同实验条件下考察该菌株去除Zn2+的性能,结果表明:在Zn2+初始浓度为300 mg/L,温度为37℃,接种量为5%的情况下,去除Zn2+的效果最好,12 h去除率可达到94%;进一步利用盆栽试验,研究了添加不同浓度菌株对印度荠菜富集土壤中锌的影响。结果发现,在添加量为40 mL菌液下(1×109 CFU/mL),印度芥菜地上部分和地下部分锌含量,相较对照组分别提高56.1%和24.3%,这说明菌株可以提高锌弱酸提取态的含量。

关键词: 抗锌菌株, 菌株筛选, Zn2+去除率, 印度芥菜

Abstract:

A zinc-resistant strain was isolated from heavy metal-polluted soil,and identified as Bacillus. Its performance of removing Zn2+ under different experimental conditions was studied. The results showed that:the removal efficiency of Zn2+ was the best,and the removal rate of Zn2+ was 94% in 12 h when the initial concentration of Zn2+ was 300 mg/L,the temperature was 37℃,inoculation amount was 5%. Subsequently,a pot experiment was conducted for investigating the influence of adding the different concentration of the strain on plant growth and Zn uptake by Brassica juncea. The results showed that the Zn content in ground and underground part of B. juncea increased by 56.1% and 24.3% respectively while adding 40 mL bacterial liquid(1×109 CFU/mL),compared with the control group. This is mainly due to the strain improves the zinc content under weak acid extraction condition.

Key words: zinc-resistant strain, screening, Zn2+removal efficiency, Brassica juncea