河南农业科学 ›› 2022, Vol. 51 ›› Issue (12): 81-89.DOI: 10.15933/j.cnki.1004-3268.2022.12.010

• 植物保护 • 上一篇    下一篇

3 株丹参根际促生细菌的筛选、鉴定及作用评价

王飞1,李雪梦1,杨瑾1,文艺1,赵晨晨2,赵莹2,刘玉霞1,高素霞1,戚文平1,秦艳红1,鲁传涛1
  

  1. (1.河南省农业科学院 植物保护研究所,河南 郑州 450002;2. 河南农业大学 植物保护学院,河南 郑州 450002)
  • 收稿日期:2022-07-08 出版日期:2022-12-15 发布日期:2023-01-17
  • 通讯作者: 秦艳红(1976-),女,河南博爱人,副研究员,主要从事植物病毒研究。E-mail:qinyanhong6040@163.com 鲁传涛(1964-),男,河南杞县人,研究员,主要从事植物保护研究。E-mail:chuantaolu@qq.com
  • 作者简介:王飞(1981-),男,河南南召人,助理研究员,在读博士研究生,主要从事药用植物保护研究。E-mail:yunfeiren@163.com。李雪梦为同等贡献作者
  • 基金资助:
    国家中药材产业技术体系项目(CARS-21);河南省农科院新兴学科项目(2022XK07);河南省农科院创新创意项目(2020CX10);河南省中药材产业技术体系项目(Z2019-13-01)

Screening,Identification and Effect Evaluation of Three Plant Growth‑Promoting Rhizobacteria from Salvia miltiorrhiza

WANG Fei1,LI Xuemeng1,YANG Jin1,WEN Yi1,ZHAO Chenchen2,ZHAO Ying2,LIU Yuxia1,GAO Suxia1,QI Wenping1,QIN Yanhong1,LU Chuantao1   

  1. (1.Institute of Plant Protection,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;2.College of Plant Protection,Henan Agricultural University,Zhengzhou 450002,China)
  • Received:2022-07-08 Published:2022-12-15 Online:2023-01-17

摘要: 为筛选出对丹参根腐病菌层出镰刀菌(Fusarium proliferatum)具有防治效果并能促进丹参生长的根际促生细菌(PGPR),采用稀释涂布平板法从丹参根际土中进行细菌分离,通过平板对峙法和吲哚乙酸(IAA)含量测定进行PGPR菌的筛选,并对筛选出的PGPR菌进行鉴定和生防、促生作用评价。结果表明,从丹参根际土分离获得的657株细菌中筛选出了3株PGPR菌(K03-4、Pp03-41、Pp146),经形态鉴定和16S rRNA 基因序列分析鉴定,3株PGPR菌均为多黏类芽孢杆菌(Paenibacillus polymyxa)。K03-4、Pp03-41和Pp146对F.proliferatum 的抑菌率分别为66.15%、61.03%、48.21%,均可分泌IAA,并有解无机磷、固氮和产嗜铁素的能力。盆栽试验结果显示,3 株PGPR 菌悬液对丹参根腐病的防效分别为83.46%、49.02%、68.31%,发酵液接种后丹参株高分别增加了29.77%、32.60%、27.64%,茎叶鲜质量分别增加了18.76%、30.57%、28.42%,分根数分别增加89.12%、76.53%、112.59%,根鲜质量分别增加了88.82%、122.49%、144.78%。综上,3株丹参PGPR菌兼具生防和促生作用。

关键词: 丹参, 根际促生细菌, 多黏类芽孢杆菌, 层出镰刀菌, 生防

Abstract: In order to obtain plant growth‑promoting rhizobacteria(PGPR)to promote growth and control root rot(Fusarium proliferatum)of Salvia miltiorrhiza,we isolated bacteria from the rhizosphere soil of Salvia miltiorrhiza by dilution coating plate method.PGPR isolates were screened by confront culturing and indoleacetic acid(IAA)assay.Then the screened strains were identified and evaluated according to their biocontrol and growth‑promoting effects.The results showed that three PGPR strains(K03‑4,Pp03‑41 and Pp146)of 657 isolates from the rhizosphere soil of S.miltiorrhiza were screened.And the three PGPR strains were all characterized as Paenibacillus polymyxa by morphological identification and 16S rRNA gene sequence analysis.The antagonistic effects of K03‑4,Pp03‑41 and Pp146 on F.proliferatum were 66.15%,61.03% and 48.21%,respectively.At the same time,the three strains had the ability to secrete IAA,dissolve inorganic phosphorus,fix nitrogen and produce siderophore.The pot experiments showed that the control effects of three PGPR strains on root rot of S.miltiorrhiza were 83.46%,49.02% and 68.31%.Meanwhile,the height of S.miltiorrhiza was increased by 29.77%,32.60% and 27.64%,the fresh weight of stem and leaf was increased by 18.76%,30.57% and 28.42%,the root number was increased by 89.12%,76.53% and 112.59%,and the fresh weight of root was increased by 88.82%,122.49% and 144.78%,respectively.In conclusion,the three PGPR strains have the function of biocontrol of root rot(F.proliferatum)of S.miltiorrhiza and growth promotion.

Key words: Salvia miltiorrhiza, Plant growth?promoting rhizobacteria, Paenibacillus polymyxa, Fusarium proliferatum, Biocontrol

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