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中国农学通报 ›› 2020, Vol. 36 ›› Issue (12): 62-67.doi: 10.11924/j.issn.1000-6850.casb20191100862

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

两株苯唑草酮降解真菌的分离与鉴定

潘国强1,2,3, 杨峰山1,2,3, 刘晓鑫1,2,3, 马玉堃1,2,3, 付海燕1,2,3, 刘春光1,2,3()   

  1. 1黑龙江大学农业微生物技术教育部工程研究中心,哈尔滨 150500
    2黑龙江大学生命科学学院,黑龙江省寒地生态修复与资源利用重点实验室,哈尔滨 150080
    3黑龙江大学生命科学学院,黑龙江省普通高校微生物重点实验室,哈尔滨 150080
  • 收稿日期:2019-11-20 修回日期:2019-12-28 出版日期:2020-04-25 发布日期:2020-04-21
  • 通讯作者: 刘春光
  • 作者简介:潘国强,男,1999年出生,黑龙江哈尔滨人,本科,研究方向:长残效除草剂的微生物降解与土壤修复。通信地址:150080 黑龙江省哈尔滨市南岗区学府路74号 黑龙江大学生命科学学院,Tel:0451-86608586,E-mail: 1435297256@qq.com
  • 基金资助:
    黑龙江省自然科学基金“寒地黑土微生物响应阿特拉津残留群落结构与多样性变化研究”(C2018051);黑龙江省普通本科高等学校青年创新人才培养计划“阿特拉津降解复合菌肥研发与农田土壤微生物修复”(UNPYSCT-2017119)

Two Strains of Topramezone Degrading Fungi: Isolation and Identification

Pan Guoqiang1,2,3, Yang Fengshan1,2,3, Liu Xiaoxin1,2,3, Ma Yukun1,2,3, Fu Haiyan1,2,3, Liu Chunguang1,2,3()   

  1. 1Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500
    2Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, School of Life Sciences, Heilongjiang University, Harbin 150080
    3Key Laboratory of Microbiology, College of Heilongjiang, Heilongjiang University, Harbin 150080
  • Received:2019-11-20 Revised:2019-12-28 Online:2020-04-25 Published:2020-04-21
  • Contact: Chunguang Liu

摘要:

为了解决玉米田除草剂苯唑草酮长期施用造成土壤中大量残留问题,本研究利用富集驯化法进行菌株筛选,利用高效液相色谱法测定其降解能力,通过形态和18S rDNA序列分析对其进行种属鉴定。结果表明,本研究从长期施用苯唑草酮的土壤中分离纯化出5株能以苯唑草酮为唯一碳源生长的真菌菌株TOF1,TOF2,TOF3,TOF4和TOF5。它们在7天内对初始浓度400 mg/L苯唑草酮的降解率分别为35.86%、34.35%、32.12%、9.91%和27.99%,通过重复验证,发现TOF1和TOF2降解重复性较好,这2个菌株分别鉴定为Penicillium chrysogenum(产黄青霉)和Penicillium tardochrysogenum(缓慢产黄青霉)。这2个种属的获得为苯唑草酮污染土壤生物修复提供了新的菌种资源。

关键词: 苯唑草酮, 真菌, 分离, 鉴定, 降解

Abstract:

To solve the problem of a large number of residues in soil caused by the long-term application of corn field herbicide topramezone, the enrichment and acclimation method was used to screen the strains, and the high efficiency liquid chromatography method was used to determine the degradation ability, and the species were identified by morphology and 18S rDNA sequence analysis in this study. The results showed that five fungal strains TOF1, TOF2, TOF3, TOF4 and TOF5, which could grow with topramezone as the sole carbon source, were isolated and purified from the soil using topramezone for a long time. The degradation efficiency of initial concentration 400 mg/L topramezone was 35.86%, 34.35%, 32.12%, 9.91% and 27.99% in seven days, respectively. TOF1 and TOF2 were found to be highly repeatable, through repeated degradation validation. These two strains were identified as Penicillium chrysogenum and Penicillium tardochrysogenum. The acquisition of these two species provides new resources for bioremediation of contaminated soil with topramezone.

Key words: topramezone, fungus, isolation, identification, degradation

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