生物学杂志

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一株抗镉真菌的鉴定及其抗性的初步研究

  

  1. 河南理工大学资源环境学院, 焦作 454000
  • 出版日期:2018-06-18 发布日期:2018-06-18
  • 通讯作者: 刘森,博士,讲师,研究方向为分子生态学与保护生物学,E-mail:lius649@hpu.edu.cn
  • 作者简介:于洪飞,硕士,实验师,研究方向为微生物资源,E-mail:xiaoyuer1979@163.com
  • 基金资助:
    河南理工大学青年基金(No.Q2011-45);河南理工大学博士基金项目(No. B2013-074);河南理工大学青年骨干教师资助计划项目(No. 2015-18)

Identification and preliminary research on the resistance of a Cd-resisting fungus#br#

  1. Institute of Resources and Environments, Henan Polytechnic University, Jiaozuo 454000, China
  • Online:2018-06-18 Published:2018-06-18

摘要: 采用梯度浓度驯化的方法,从河南理工大学煤场土样中分离到一株抗镉真菌,编号为M2。通过传统形态学方法及真菌18S rDNA序列的系统发育分析鉴定,菌株M2为旋孢腔菌属(Cochliobolus)月状旋孢腔菌(Cochliobolus lunatus,有性态),即弯孢霉属(Curvularia Boedin)新月弯孢霉(Curvularia lunata,无性态),其可在镉质量浓度为4000 mg/L的平板上生长。同时还初步探索了菌株M2对重金属铅、铬、铜、锌、钴和镍的耐受性,菌株对7种重金属的抗性强弱顺序为Cd2+(4000 mg/L)>Pb2+(1500 mg/L)>Zn2+(600 mg/L)>Cu2+(400 mg/L)>Ni2+(100 mg/L)>Co2+(80 mg/L)>Cr2+(60 mg/L)。

关键词: 抗镉真菌, 18S rDNA, 月状旋孢腔菌

Abstract: tA strain of Cd-resisting fungus, named M2, was isolated from soil samples near the coal yield by acclimation based on the concentration gradient approach. M2 was identified as Cochliobolus lunatus(telemorph), namely Curvularia lunata(anamorph), by traditional morphological method and phyogenetic analysis based on 18S rDNA sequence. This strain was able to grow well on plate containing 4000 mg/L Cd2+. We also studied the resistance of M2 to heavy metal Pb, Cr, Cu, Zn, Co and Ni. The resistance decreased in the order of Cd2+ (4000 mg/L)> Pb2+ (1500 mg/L)> Zn2+ (600 mg/L)> Cu2+ (400 mg/L)> Ni2+ (100 mg/L)> Co2+ (80 mg/L)> Cr2+ (60 mg/L).

Key words: Cd-resisting fungus, 18S rDNA, Cochliobolus lunatus