ArticleCurrent microbiology2026
Biocontrol Potential of Alcaligenes faecalis ZD02 Against the root-knot nematode, Meloidogyne incognita.
Article in Current microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Root-knot nematodes (RKNs, Meloidogyne spp.) are obligate sedentary endoparasites and represent one of the most destructive crop pests globally. Although chemical nematicides are still widely used for RKN management, their excessive and long-term application causes severe environmental pollution, ecological imbalance, and potential risks to human health. Consequently, microbial biocontrol agents have emerged as eco-friendly and sustainable alternatives for RKN control. Our previous study demonstrated that the novel nematocidal bacterium Alcaligenes faecalis ZD02 exhibits nematicidal activity against M. incognita second-stage juveniles (J2) in vitro. In this study, pot trials confirmed that A. faecalis ZD02 can inhibit RKN infection of tomato (Solanum lycopersicum cv. Rutgers). Further studies revealed that protease activity in rhizosphere soil was significantly elevated in the A. faecalis ZD02 treatment group, suggesting that proteases may contribute to suppression of M. incognita J2 infection. Additionally, A. faecalis ZD02 fermentation products exhibited a preliminary repellent effect on M. incognita J2, which may interfere with the re-invasion stage of M. incognita-a critical phase where J2 actively reinvades host plants in the soil. Collectively, these findings indicate that A. faecalis ZD02 is a promising candidate biocontrol agent for RKN management.
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