02293nam a2200301Ia 4500 MX-MdCICY 20260521091648.0 CICY B-19023 Rhizosphere bacteria induce programmed cell death defence genes and signalling in chilli pepper Journal of Applied MicroBiology, DOI: 10.1111/jam.15456, 2021 To understand how beneficial bacteria assist chilli plants (Capsicum annuum)in defence against biotrophic or hemibiotrophic pathogens. Method and results: We quantified marker genes of plant defence pathways in Phytophthora capsici-infected chilli pepper treated with anti-oomycete plant growth-promoting rhizobacteria, Bacillus amyloliquefaciens, Bacillus velezensis and Acinetobacter sp. Plants displayed strong resistance, and the pathogen load in the roots was significantly lower in infected plants treated with bacterial biocontrol agents at all time points tested (1, 2 and 7 days after pathogen inoculation, p < 0.05). Gene expression profiling revealed that P. capsici infection in the absence of beneficial bacteria led to the upregulation of a wide array of defence genes. The addition of biocontrol bacteria modulated defence by further enhancing genes involved in programmed cell death, such as CaLOX1, CaPAL1, CaChitIV and CaPTI1, while suppressing others CaLRR1, a negative regulator of cell death. Conclusions: Our results suggest that the bacteria exerted a combined effect by directly antagonizing the pathogen and enhancing the expression of key plant defence genes, including those involved in cell death, causing resistance at early stages of infection by this hemibiotrophic pathogen. PHYTOPHTHORA CAPSICI PCD ANTI-OOMYCETE CHILLI PEPPER DEFENCE GENE EXPRESSION PLANT DEFENCE SIGNALLING Syed-Ab-Rahman, S. F. Arkhipov, A. Wass, T. J. Xiao, Y. Carvalhais, L. C. Schenk, P. M. https://drive.google.com/file/d/1vhLKo6-kwPttGJ3W8Q5aTGz_0mQ3bapK/view?usp=drivesdk Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx Loc REF1 250602s9999 xx |||||s2 |||| ||und|d 29103 29103 0 0 Loc 0 0 F1 CICY CICY RE 2025-06-25 0 B-19023 2025-06-25 16:24:23 2025-06-25 REF1