AI Article Synopsis
- * Strain R31 of myxobacteria demonstrated a strong ability to predate the bacteria causing TBW, achieving a biocontrol efficiency of 81.9% in pot experiments.
- * The research also identified specific proteins secreted by strain R31, such as peptidases and lipases, that may contribute to its biocontrol capabilities through predation and lytic activity against the harmful bacterium.
Article Abstract
The pathogenic bacterium caused tomato bacterial wilt (TBW), a destructive soil-borne disease worldwide. There is an urgent need to develop effective control methods. Myxobacteria are microbial predators and are widely distributed in the soil. Compared with other biocontrol bacteria that produce antibacterial substances, the myxobacteria have great potential for biocontrol. This study reports a strain of R31 that exhibits high antagonistic activity to . Plate test indicated that the strain R31 efficiently predated Pot experiments showed that the biocontrol efficacy of strain R31 against TBW was 81.9%. Further study found that the secreted protein precipitated by ammonium sulfate had significant lytic activity against cells, whereas the ethyl acetate extract of strain R31 had no inhibitory activity against . Substrate spectroscopy assay and liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis of secreted proteins showed that some peptidases, lipases, and glycoside hydrolases might play important roles and could be potential biocontrol factors involved in predation. The present study reveals for the first time that the use of strain R31 as a potential biocontrol agent could efficiently control TBW by predation and secreting extracellular lyase proteins.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8859152 | PMC |
| http://dx.doi.org/10.3389/fmicb.2021.801091 | DOI Listing |
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