Rhizosphere Engineering of Biocontrol Agents Enriches Soil Microbial Diversity and Effectively Controls Root-Knot Nematodes.

Autor: Vinothini K; Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, 641 003, India., Nakkeeran S; Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, 641 003, India. nakkeeranayya@tnau.ac.in., Saranya N; Department of Plant Molecular Biology and Bioinformatics, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, 641003, India., Jothi P; Department of Nematology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, 641 003, India., Richard JI; Department of Plant Molecular Biology and Bioinformatics, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, 641003, India., Perveen K; Department of Botany & Microbiology, College of Science, King Saud University, P.O. Box-22452, 11495, Riyadh, Saudi Arabia., Bukhari NA; Department of Botany & Microbiology, College of Science, King Saud University, P.O. Box-22452, 11495, Riyadh, Saudi Arabia., Glick BR; Department of Biology, University of Waterloo, Waterloo, ON, N2L 3G1, Canada., Sayyed RZ; Department of Biological Sciences and Chemistry, College of Arts and Science, University of Nizwa, Nizwa, 616, Sultanate of Oman. sayyedrz@gmail.com., Mastinu A; Department of Molecular and Translational Medicine, Division of Pharmacology, University of Brescia, Viale Europa 11, 25123, Brescia, Italy. andrea.mastinu@unibs.it.
Jazyk: angličtina
Zdroj: Microbial ecology [Microb Ecol] 2024 Sep 28; Vol. 87 (1), pp. 120. Date of Electronic Publication: 2024 Sep 28.
DOI: 10.1007/s00248-024-02435-7
Abstrakt: 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.
(© 2024. The Author(s).)
Databáze: MEDLINE
Externí odkaz: