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中国农学通报 ›› 2023, Vol. 39 ›› Issue (24): 50-58.doi: 10.11924/j.issn.1000-6850.casb2022-0940

• 林学·园艺·园林 • 上一篇    下一篇

耐盐碱番茄内生菌的筛选鉴定及功能研究

卢雨欣1,2(), 赵文娟1,2, 白亚妮1,2(), 冯志珍1,2, 颜宏1,2, 秦涛1,2   

  1. 1 陕西省生物农业研究所,西安 710043
    2 陕西省酶工程技术研究中心,西安 710600
  • 收稿日期:2022-11-23 修回日期:2023-03-15 出版日期:2023-08-25 发布日期:2023-08-23
  • 通讯作者: 白亚妮,女,1983年生,陕西宜君人,副研究员,博士,研究方向:土壤生物改良研究及生物肥料研发。通信地址:710043 陕西省西安市新城区咸宁中路125号 陕西省生物农业研究所,Tel:15529500862,E-mail:baiyn@xab.ac.cn
  • 作者简介:

    卢雨欣,女,1995年出生,陕西咸阳人,硕士,研究方向:土壤生物改良研究及生物肥料研发。通信地址:710043 陕西省西安市新城区咸宁中路125号 陕西省生物农业研究所,Tel:13060457115,E-mail:

  • 基金资助:
    陕西省科学院青年联合创新项目“耐盐碱菌群构建及相关功能菌肥研发”(2021k-14); 西安市科技计划项目“草莓连作障碍专用微生态制剂的研发与应用”(22NYYF030); 陕西省重点研发计划项目“盐碱土壤生物修复机理及关键技术研究与示范”(2021ZDLNY05-01); 陕西省重点研发计划项目“一种提高植物耐盐性微生物叶面肥的研发与应用”(2021NY-046)

Saline-Alkali Tolerant Endophytic Bacteria in Tomato: Screening, Identification and Functional Study

LU Yuxin1,2(), ZHAO Wenjuan1,2, BAI Yani1,2(), FENG Zhizhen1,2, YAN Hong1,2, QIN Tao1,2   

  1. 1 Bio-Agriculture Institute of Shaanxi, Xi'an 710043
    2 Enzyme Engineering Research Center of Shaanxi Province, Xi'an 710600
  • Received:2022-11-23 Revised:2023-03-15 Online:2023-08-25 Published:2023-08-23

摘要:

研究旨在挖掘耐盐碱内生菌资源,为后期开发内生菌菌肥及生防菌剂提供新的菌种资源。以‘金棚8号’番茄为植物材料,通过模拟5种不同类型盐碱环境,分离筛选内生菌,并进行16S rRNA分子生物学鉴定,采用平板法研究其促生和生防功能。研究共获得耐盐碱内生菌14株,其中5株具有解无机磷能力,2株具有解钾能力,2株具有固氮能力,4株具有产生长素的能力;6株具有产铁载体能力,直径比值(D/d)最高为2.95;10株具有产蛋白酶能力,直径比值(D/d)最高为2.97。拮抗试验结果显示,8株耐盐碱内生菌对苹果树腐烂病病原菌有抑制作用,抑菌率为13.70%~68.56%;芽孢杆菌BFG 3-3、BFG 5-1和浅紫链霉菌BFY 2-2可分别对6~7种常见果蔬病原菌产生拮抗,具有广谱抑菌性。本研究获得了具有促生和生防潜力的功能性耐盐碱内生菌菌株,可为应用植物内生菌改良盐碱地提供理论依据。

关键词: 耐盐碱, 番茄内生菌, 分离培养, 促生, 拮抗

Abstract:

This study aimed to explore the resources of saline-alkali tolerant endophytic bacteria and to provide new strain resources for the development of endophytic fertilizer and biocontrol products. Using ‘Jinpeng No. 8’ tomato as plant material, five different types of saline-alkali environment were simulated, endophytic bacteria were isolated and identified by 16S rRNA molecular method, and then the function of bacteria were screened by plating method. A total of 14 strains of saline-alkali tolerant endophytic bacteria were obtained in this study, among which 5 strains had the ability to solve inorganic phosphorus, 2 strains had the ability to dissolve potassium, 2 strains were capable of nitrogen fixation, and 4 strains had the ability to produce auxin; 6 strains had the ability to produce iron carriers, the highest diameter ratio (D/d) was 2.95; 10 strains had the ability to produce protease, and the highest diameter ratio (D/d) was 2.97. The antagonistic results showed that 8 strains of saline-alkali tolerant endophytic bacteria could inhibit the pathogen of apple tree rot, and the inhibition rate was 13.70%-68.56%. Bacillus sp. BFG 3-3, BFG 5-1 and Streptomyces violascens BFY 2-2 showed antagonistic against 6-7 strains of common fruit and vegetable pathogens, exhibiting broad spectrum antibacterial activity. In this study, saline-alkali tolerant endophytic bacteria with the potentials of promoting plant growth and antagonism against pathogens were obtained, which provided theoretical basis for the application of endophytic bacteria in the amendment of saline-alkali soil.

Key words: saline-alkali tolerant, endophytic bacteria in tomato, isolation and cultivation, growth promoting, antagonism