Work

A dTALE approach demonstrates that induction of common bean OVATE Family Protein 7 promotes resistance to common bacterial blight

Year: 2024

Type: article

Abstract: Common bacterial blight (CBB) is a devastating seed-transmitted disease of common bean (Phaseolus vulgaris L.), caused by Xanthomonas phaseoli pv. phaseoli and Xanthomonas citri pv. fuscans. The genes responsible for CBB resistance are largely unknown. Moreover, the lack of a reproducible and universal transformation protocol limits the study of genetic traits in common bean. We produced X. phaseoli pv. phaseoli strains expressing artificially designed transcription-activator like effectors (dTALEs) to target 14 candidate genes for resistance to CBB based on previous transcriptomic data. In planta assays in a susceptible common bean genotype showed that induction of PvOFP7, PvAP2-ERF71, or PvExpansinA17 expression by dTALEs resulted in CBB symptom reduction. After PvOFP7 induction, in planta bacterial growth was reduced at early colonization stages, and RNA-seq analysis revealed up-regulation of cell wall formation and primary metabolism, together with major down-regulation of heat shock proteins. Our results demonstrated that PvOFP7 contributes to CBB resistance, and underlined the usefulness of dTALEs for functional validation of genes whose induction impacts Xanthomonas-plant interactions.

Source: Journal of Experimental Botany

DOI: 10.1093/jxb/erae433

Authors: Charlotte Gaudin, Anne Preveaux, Nathan Aubineau, Damien Le Goff, Marie-Agnès Jacques, Nicolas W G Chen

Institutions: Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Institut de Recherche en Horticulture et Semences, Université d'Angers

Language: English

Topic: Plant Pathogenic Bacteria Studies

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: green

Funder: Agence Nationale de la Recherche