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Plant Pathology

Gupta, R. - Department of Plant Pathology and Weed Research, Plant Protection Institute, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel
 Leibman-Markus, M. - Department of Plant Pathology and Weed Research, Plant Protection Institute, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel 
Pizarro, L. - Department of Plant Pathology and Weed Research, Plant Protection Institute, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel; Institute of Agri-food, Animal and Environmental Sciences, Universidad de O'Higgins, O'Higgins, Chile
Bar, M. - Department of Plant Pathology and Weed Research, Plant Protection Institute, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel

Phytohormones are involved in the regulation of plant responses to biotic stress. How a limited number of hormones differentially regulate defence responses and influence the outcome of plant–biotic interactions is not fully understood. In recent years, cytokinin (CK) was shown to induce plant resistance against several pathogens. In the present study, we investigated the effect of CK in inducing tomato resistance against the hemibiotrophic pathogenic bacteria Xanthomonas campestris pv. vesicatoria (Xcv) and Pseudomonas syringae pv. tomato (Pst). We demonstrate that CK enhances tomato resistance to Xcv and Pst through a process that relies on salicylic acid and ethylene signalling. CK did not directly affect the growth or biofilm formation ability of these pathogens in vitro. Overall, our work provides insight into the underlying mechanisms of CK-induced immune responses against bacterial pathogens in tomato.

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Cytokinin induces bacterial pathogen resistance in tomato
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Gupta, R. - Department of Plant Pathology and Weed Research, Plant Protection Institute, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel
 Leibman-Markus, M. - Department of Plant Pathology and Weed Research, Plant Protection Institute, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel 
Pizarro, L. - Department of Plant Pathology and Weed Research, Plant Protection Institute, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel; Institute of Agri-food, Animal and Environmental Sciences, Universidad de O'Higgins, O'Higgins, Chile
Bar, M. - Department of Plant Pathology and Weed Research, Plant Protection Institute, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel

Cytokinin induces bacterial pathogen resistance in tomato

Phytohormones are involved in the regulation of plant responses to biotic stress. How a limited number of hormones differentially regulate defence responses and influence the outcome of plant–biotic interactions is not fully understood. In recent years, cytokinin (CK) was shown to induce plant resistance against several pathogens. In the present study, we investigated the effect of CK in inducing tomato resistance against the hemibiotrophic pathogenic bacteria Xanthomonas campestris pv. vesicatoria (Xcv) and Pseudomonas syringae pv. tomato (Pst). We demonstrate that CK enhances tomato resistance to Xcv and Pst through a process that relies on salicylic acid and ethylene signalling. CK did not directly affect the growth or biofilm formation ability of these pathogens in vitro. Overall, our work provides insight into the underlying mechanisms of CK-induced immune responses against bacterial pathogens in tomato.

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