Journal
FRONTIERS IN MICROBIOLOGY
Volume 12, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fmicb.2021.782523
Keywords
Bacillus; biocontrol; F; oxysporum; root rot; wolfberry; rhizosphere bacterial community
Categories
Funding
- National Key Research and Development Project [2018YFE0127200]
- International Science and Technology Cooperation Base of Gansu Province [2020-0413- GHC-0036]
- Gansu Province Science and Technology Major Special Plan [21ZD4NA019]
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This study demonstrates the potential of two bacterial biological control agents in suppressing root rot disease in Chinese wolfberry. It also reveals the impact of these biocontrol strains on the bacterial community in the wolfberry rhizosphere. The results show that the bacterial strains can inhibit fungal growth and promote the growth of wolfberry seedlings.
Root rot disease is a serious infection leading to production loss of Chinese wolfberry (Lycium barbarum). This study tested the potential for two bacterial biological control agents, Bacillus amyloliquefaciens HSB1 and FZB42, against five fungal pathogens that frequently cause root rot in Chinese wolfberry. Both HSB1 and FZB42 were found to inhibit fungal mycelial growth, in vitro and in planta, as well as to promote the growth of wolfberry seedlings. In fact, a biocontrol experiment showed efficiency of 100% with at least one treatment involving each biocontrol strain against Fusarium oxysporum. Metagenomic sequencing was used to assess bacterial community shifts in the wolfberry rhizosphere upon introduction of each biocontrol strain. Results showed that HSB1 and FZB42 differentially altered the abundances of different taxa present and positively influenced various functions of inherent wolfberry rhizosphere bacteria. This study highlights the application of biocontrol method in the suppression of fungal pathogens that cause root rot disease in wolfberry, which is useful for agricultural extension agents and commercial growers.
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