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Rhizosphere Engineering of Biocontrol Agents Enriches Soil Microbial Diversity and Effectively Controls Root-Knot Nematodes
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Journal Article
Rhizosphere Engineering of Biocontrol Agents Enriches Soil Microbial Diversity and Effectively Controls Root-Knot Nematodes
2024
Overview
The root-knot nematode (RKN) causes significant yield loss in tomatoes. Understanding the interaction of biocontrol agents (BCAs)-nematicides-soil microbiomes and RKNs is essential for enhancing the efficacy of biocontrol agents and nematicides to curb RKN damage to crops. The present study aimed to evaluate the in vitro effectiveness of BACa and nematicide against RKN and to apply the amplicon sequencing to assess the interaction of
Bacillus velezensis
(VB7) and
Trichoderma koningiopsis
(TK) against RKNs. Metagenomic analysis revealed the relative abundance of three phyla such as Proteobacteria (42.16%), Firmicutes (19.57%), and Actinobacteria (17.69%) in tomato rhizospheres. Those tomato rhizospheres treated with the combined application of
B. velezensis
VB7 +
T. koningiopsis
TK and RKN had a greater frequency of diversity and richness than the control. RKN-infested tomato rhizosphere drenched with bacterial and fungal antagonists had the maximum diversity index of bacterial communities. A strong correlation with a maximum number of interconnection edges in the phyla Proteobacteria, Firmicutes, and Actinobacteria was evident in soils treated with both
B. velezensis
VB7 and
T. koningiopsis
TK challenged against RKN in infected soil. The present study determined a much greater diversity of bacterial taxa observed in tomato rhizosphere soils treated with
B. velezensis
VB7 and
T. koningiopsis
TK than in untreated soil. It is suggested that the increased diversity and abundance of bacterial communities might be responsible for increased nematicidal properties in tomato plants. Hence, the combined applications of
B. velezensis
VB7 and
T. koningiopsis
TK can enhance the nematicidal action to curb RKN infecting tomatoes.
Publisher
Springer US,Springer Nature B.V
Subject
/ Animals
/ Antinematodal Agents - pharmacology
/ Bacteria
/ Biological Control Agents - pharmacology
/ Biomedical and Life Sciences
/ Ecology
/ Eggs
/ fungi
/ Geoecology/Natural Processes
/ Plant Diseases - microbiology
/ Plant Diseases - parasitology
/ Plant Diseases - prevention & control
/ Soil
/ Soils
/ Solanum lycopersicum - microbiology
/ Solanum lycopersicum - parasitology
/ Tomatoes
/ VOCs
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