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Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (1): 79-90.doi: 10.16420/j.issn.0513-353x.2021-0924

• Research Papers • Previous Articles     Next Articles

Isolation,Identification and Analysis of Biocontrol Ability of Biocontrol Strain TL1 Against Tomato Botrytis cinerea

SHI Hongli1, LI La1, GUO Cuimei1, YU Tingting1, JIAN Wei1,*(), YANG Xingyong1,2,*()   

  1. 1College of Life Science,Chongqing Normal University,Chongqing 401331,China
    2School of Pharmacy Chengdu University,Chengdu 601106,China
  • Received:2022-06-07 Revised:2022-07-27 Online:2023-01-25 Published:2023-01-18
  • Contact: *(E-mail:jianwei7956@163.comyangxy94@swu.edu.cn

Abstract:

In order to screen the antagonistic strain against Botrytis cinerea,a TL1 strain with good antagonistic effect was isolated from the soil of Tibet Plateau by plate confrontation method. The results of morphological observation,physiological and biochemical analysis and molecular biological identification showed that TL1 strain was Paenibacillus maysiensis,which could fix nitrogen and dissolving phosphorus. In addition,TL1 strain could significantly inhibit the mycelial growth of Botrytis cinerea on the plate,and the inhibition rate was 74.32%. It was further found that the volatile substances produced by TL1 strain showed significant inhibition activity. Plate inhibition test showed that TL1 strain had significant inhibition activity against six pathogenic fungi,such as brown spot. Among them,the inhibition rate of Alternaria alternata was the highest(73.48%),and the inhibition rate of Corynespora cassiicola was the lowest (57.37%). Physiological experiments showed that TL1 strain could colonize tomato fruit and inhibit the decay caused by gray mold,and TL1 strain could significantly improve seed germination rate and promote the growth of tomato seedlings.

Key words: tomato, Botrytis cinerea, Paenibacillus, biocontrol, mechanism, inhibition

CLC Number: