湖北农业科学 ›› 2021, Vol. 60 ›› Issue (1): 80-84.doi: 10.14088/j.cnki.issn0439-8114.2021.01.017

• 园艺·特产 • 上一篇    下一篇

一株桑树根际促生菌的筛选鉴定及促生性能研究

杨统一1, 杜秋霞1, 刘静霏1, 翟德丽1, 刘延鹏1, 赵卫国1,2   

  1. 1.江苏科技大学,江苏 镇江 212018;
    2.中国农业科学院蚕业研究所,江苏 镇江 212018
  • 收稿日期:2020-04-13 出版日期:2021-01-10 发布日期:2021-02-02
  • 通讯作者: 赵卫国,研究员,博士,主要从事桑品种育种工作,(电话)13775327390(电子信箱)wgzsri@126.com。
  • 作者简介:杨统一(1980-),男,河南商丘人,副教授,博士,主要从事土壤微生物的研究工作,(电话)13656133965(电子信箱)tongyi@just.edu.cn。
  • 基金资助:
    国家自然科学基金项目(31400448);镇江市现代农业项目(NY2018013,NY2019022);国家蚕桑技术体系项目(CARS-18-ZJ0207);广西创新驱动发展专项资金项目(AA19182012-2);农业农村部种质资源保种项目(111721301354052026);国家作物种质资源平台项目(NICGR-43)

Screening, identification and the growth-promoting ability for mulberry growth-promoting bacteria

YANG Tong-yi1, DU Qiu-xia1, LIU Jing-fei1, ZHAI De-li1, LIU Yan-peng1, ZHAO Wei-guo1,2   

  1. 1. Jiangsu University of Science and Technology,Zhenjiang 212018,Jiangsu,China;
    2. Sericultural Research Institute,Chinese Academy of Agricultural Sciences,Zhenjiang 212018,Jiangsu,China
  • Received:2020-04-13 Online:2021-01-10 Published:2021-02-02

摘要: 从桑树根际土壤中筛选分离出一株具有促生能力的细菌G2,经过形态学特征观察、生理生化特性以及16S rDNA测序比对,鉴定为施氏假单胞菌(Pseudomonas stutzeri),并研究了不同pH、培养时间等对G2菌株的促生能力的影响。结果表明,在pH为7时,培养48 h G2菌溶磷能力达到最高,为17.96 mg/L;而IAA的分泌速度在48 h之前较快。盆栽试验表明,接种稀释100倍的G2菌液后,桑树苗的株高、鲜重、地上部干重及根系干重分别较对照提高31.8%、38.5%、34.6及31.2%。综合分析表明,G2菌株具有较强的促生能力,为桑树微生物菌肥的开发提供了理论支撑。

关键词: 植物生长促进菌, 溶磷, 生长素, 桑树

Abstract: In this study,a strain G2 with the ability to promote growth was isolated from mulberry rhizosphere soil.After morphological observation,physiological and biochemical characteristics and 16S rDNA sequencing comparison,the strain was identified as Pseudomonas schneideri.The effects of different pH value and culture time on the growth promoting ability of G2 strain were also studied.The results showed that the highest phosphorus dissolving ability of G2 was 17.96 mg/L at pH 7,and the secretion rate of IAA was faster before 48 h.Pot experiments showed that after inoculation with G2 solution diluted 100 times,the height,fresh weight,shoot dry weight and root dry weight of mulberry seedlings increased by 31.8%,38.5%,34.6% and 31.2%,respectively,compared with the control.The comprehensive analysis showed that G2 strain had strong growth promoting ability,which provided theoretical support for the development of mulberry microbial fertilizer.

Key words: pant growth-promoting bacteria, phosphorus-solubilizing, IAA, mulberry

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