Soft-rotting bacteria affecting bell peppers crops represent an economically destructive disease of growing importance worldwide. In Venezuela since 2006, soft-rot symptoms have been occasionally observed in bell pepper fruits grown under greenhouse conditions. Affected fruits presented water-soaked lesions that progressed to complete fruit maceration. Bacteria were isolated from water-soaked lesions in order to identify the causal agent of this disease. Of 13 bacterial isolates recovered from affected fruits, only isolate AGPim1A was able to produce a hypersensitive reaction in tobacco plants and to reproduce soft-rot symptoms in bell peppers fruits. Several methods, including classical bacteriological tests and carbon utilization profiling, alongside with sequence analysis of 16S rRNA and housekeeping genes gyrB and groES-groEL, allowed identification of the soft-rotting bacterium as Serratia marcescens. To our knowledge, this is the first report showing a S. marcescens strain associated with soft-rot disease in bell pepper fruits.
Affiliations
Universidad Simón BolívarLab. de Biotecnología Agrícola, Dpto. de Biología Celular
Gillis, A., Rodríguez, M., & Santana, M. A. (2014). Serratia marcescens associated with bell pepper (Capsicum annuum L.) soft-rot disease under greenhouse conditions. European Journal of Plant Pathology, 138(1), 1-8. https://doi.org/10.1007/s10658-013-0300-x (Original work published 2014)