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Solanum torvum mediates protection against the nematode Meloidogyne incognita in neighboring plants

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Abstract

This study investigates the natural repellency of Solanum torvum Sw. (herein Torvum) to the Meloidogyne incognita (M. incognita) and the influence on neighboring plants. Torvum is a solanaceous species that has demonstrated high resistance to several pathogens and pests transmitted from the soil, including M. incognita. Inoculation experiments were performed on five Solanaceae species. The results confirmed the high resistance of Torvum to M. incognita and its ability to have beneficial effects on closely grown plants, evidenced by a significant reduction of galls and egg masses on the highly susceptible plants of Solanum melongena L. and Solanum lycopersicum. We show that the resistance of Torvum is due to impenetrability to M. incognita. We show that roots of in vitro grown Torvum present distinguished trichomes and root hair phenotypes. In our previous study, the Torvum transcriptome revealed differentially expressed genes with significant enrichment for the sesquiterpenoid and chitinase genes. Re-analyzing the transcriptomic data of our previous work, we found several genes modulated among those of Dirigent/Disease Resistance Response (DIR/DRR) proteins, then validated through qRT-PCR. The resistant plants showed DIR-DRR genes highly expressed compared to susceptible in the controls and inoculated plants, thus suggesting a role in plant defense. We proposed a schematic model to explain the protection potential of Torvum against M. incognita infection and possibly new opportunities in the plant protection.

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  • 02 August 2023

    Unfortunately the article is published without ESM files and the correct ESM file is attached.

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Funding

This study received partial financial support from CREA-DC-Proteggo Grant. The authors declare that they have no financial interests.

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Conceptualization; Investigation and formal analysis; Resources and writing—review and editing original manuscript [T.I.]. Molecular analysis [T.S.]; Experimental investigations [I.C., F.T.]. Reviewing [I.C., T.S.].

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Correspondence to T. Irdani.

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Irdani, T., Sala, T., Cutino, I. et al.Solanum torvum mediates protection against the nematode Meloidogyne incognita in neighboring plants”. J Plant Dis Prot 130, 1301–1315 (2023). https://doi.org/10.1007/s41348-023-00778-w

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  • DOI: https://doi.org/10.1007/s41348-023-00778-w

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