生物技术通报 ›› 2016, Vol. 32 ›› Issue (10): 219-226.doi: 10.13560/j.cnki.biotech.bull.1985.2016.10.027

• 研究报告 • 上一篇    下一篇

黑麦草根际铁载体产生菌WN-H3的分离鉴定及其产铁载体培养条件的优化

陈伟, 舒健虹, 陈莹, 曾庆飞, 王小利, 陆瑞霞, 付薇   

  1. 贵州省草业研究所,贵阳 550009
  • 收稿日期:2016-02-16 出版日期:2016-10-25 发布日期:2016-10-12
  • 作者简介:陈伟,男,助理研究员,研究方向:生物技术;E-mail:44075638@qq.com
  • 基金资助:
    贵州省农业科学院研究生科研创新基金项目(黔农科合(创新基金)2011015号)

Screening,Identification and Fermentation Condition Optimun of a Siderophore-producing Bacteria WN-H3 from Rhizosphere of Ryegrass

CHEN Wei, SHU Jian-hong, CHEN Ying, ZENG Qing-fei, WANG Xiao-li, LU Rui-xia, FU Wei   

  1. Guizhou Institute of Prataculture,Guiyang 550009
  • Received:2016-02-16 Published:2016-10-25 Online:2016-10-12

摘要: 从黑麦草(Lolium perenne L.)根际土壤中分离得到28份菌株,采用刃天青(chrome azural S,CAS)平板检测法定性、定量筛选出1株产铁载体能力较强的细菌WN-H3,经过菌落形态、生理生化特征、16S rDNA序列同源性和系统发育分析,初步判断为一株弗村假单胞菌(Pseudomonas vranovensis)。在摇瓶水平上采用单因子法分别研究了铁载体合成菌株WN-H3的碳、氮源利用效果及培养温度、摇床转速、培养基初始pH值等因素对菌株生长及铁载体合成能力的影响,最终优化得到铁载体产生菌的最佳发酵条件:蔗糖10 g/L,酵母浸出粉5 g/L,NaCl 5 g/L,温度28℃,转速180 r/min,pH7.5,该条件下培养48 h后菌株WN-H3产生的铁载体活性su值可达80.4%。实验表明,优化后的培养条件更利于铁载体产生菌的生长和铁载体合成。

关键词: 铁载体产生菌, 筛选, 鉴定, 条件优化

Abstract: By mean of the chrome azural S(CAS)assay,a high-affinity siderophore- producing bacteria WN-H3 was screened out from 28 bacteria,which were isolated from the ryegrass(Lolium perenne L.)rhizosphere soil. According to morphological,biochemical and physiological characteristics,16S rDNA sequence and phylogenetic analysis,the strain was identified as Pseudomonas vranovensis. The optimal medium components(carbon and nitrogen sources)and growth conditions(temperature,rotation speed and initial pH)for siderphore production by strain WN-H3 were researched by one variable-at-a-time method. The result demonstrated that high siderophore production was yeilded at high siderophore- producing ability of 80.4% under the condition of 10 g/L sucrose,5 g/L yeast extracion,5 g/L NaCl,temperature 28℃,initial pH7.5,180 r/min.

Key words: siderophore-producing bacteria, screening, identification, condition optimun