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Timilsina S, Adkison H, Testen AL, Newberry EA, Miller SA, Paret ML, Minsavage GV, Goss EM, Jones JB, Vallad GE. A Novel Phylogroup of Pseudomonas cichorii Identified Following an Unusual Disease Outbreak on Tomato. PHYTOPATHOLOGY 2017; 107:1298-1304. [PMID: 28613108 DOI: 10.1094/phyto-05-17-0178-r] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Recently, in Central Florida tomato production fields, tomato foliage and fruit were observed with symptoms similar to bacterial speck. Fluorescent pseudomonads were consistently isolated and the strains were characterized by standard LOPAT tests, pathogenicity tests, and genetic characterization using 16S ribosomal RNA (rRNA) sequences and multilocus sequence analysis (MLSA) of conserved housekeeping genes. LOPAT test results indicated that the strains were likely Pseudomonas cichorii. These strains were pathogenic on tomato and were also pathogenic on lettuce, the host for the type strain of P. cichorii. Likewise, strains of P. cichorii isolated in Florida since the early 1980s from hosts other than tomato, along with the type strain, were also pathogenic on tomato. Genetic characterization using 16S rRNA and MLSA confirmed that the strains were most closely related to P. cichorii but varied significantly from the type strain. The Florida P. cichorii strains formed a separate phylogenetic group along with P. cichorii strains isolated from tomato in Tanzania. These strains were different from the previously described morphotypes and genomovars of P. cichorii. Our results indicate the presence of a genetically distinct group of multihost pathogenic P. cichorii strains that have been present in Florida since at least the early 1980s.
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Affiliation(s)
- Sujan Timilsina
- First, fourth, seventh, eighth, and ninth authors: Department of Plant Pathology, University of Florida, Gainesville 32611; first, second, and tenth authors: Gulf Coast Research and Education Center, University of Florida, Balm 33598; third and fifth authors: Department of Plant Pathology, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster 44691; fourth and sixth authors: North Florida Research and Education Center, Quincy 32251; and eighth author: Emerging Pathogens Institute, University of Florida, Gainesville 32610
| | - Heather Adkison
- First, fourth, seventh, eighth, and ninth authors: Department of Plant Pathology, University of Florida, Gainesville 32611; first, second, and tenth authors: Gulf Coast Research and Education Center, University of Florida, Balm 33598; third and fifth authors: Department of Plant Pathology, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster 44691; fourth and sixth authors: North Florida Research and Education Center, Quincy 32251; and eighth author: Emerging Pathogens Institute, University of Florida, Gainesville 32610
| | - Anna L Testen
- First, fourth, seventh, eighth, and ninth authors: Department of Plant Pathology, University of Florida, Gainesville 32611; first, second, and tenth authors: Gulf Coast Research and Education Center, University of Florida, Balm 33598; third and fifth authors: Department of Plant Pathology, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster 44691; fourth and sixth authors: North Florida Research and Education Center, Quincy 32251; and eighth author: Emerging Pathogens Institute, University of Florida, Gainesville 32610
| | - Eric A Newberry
- First, fourth, seventh, eighth, and ninth authors: Department of Plant Pathology, University of Florida, Gainesville 32611; first, second, and tenth authors: Gulf Coast Research and Education Center, University of Florida, Balm 33598; third and fifth authors: Department of Plant Pathology, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster 44691; fourth and sixth authors: North Florida Research and Education Center, Quincy 32251; and eighth author: Emerging Pathogens Institute, University of Florida, Gainesville 32610
| | - Sally A Miller
- First, fourth, seventh, eighth, and ninth authors: Department of Plant Pathology, University of Florida, Gainesville 32611; first, second, and tenth authors: Gulf Coast Research and Education Center, University of Florida, Balm 33598; third and fifth authors: Department of Plant Pathology, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster 44691; fourth and sixth authors: North Florida Research and Education Center, Quincy 32251; and eighth author: Emerging Pathogens Institute, University of Florida, Gainesville 32610
| | - Matthews L Paret
- First, fourth, seventh, eighth, and ninth authors: Department of Plant Pathology, University of Florida, Gainesville 32611; first, second, and tenth authors: Gulf Coast Research and Education Center, University of Florida, Balm 33598; third and fifth authors: Department of Plant Pathology, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster 44691; fourth and sixth authors: North Florida Research and Education Center, Quincy 32251; and eighth author: Emerging Pathogens Institute, University of Florida, Gainesville 32610
| | - Gerald V Minsavage
- First, fourth, seventh, eighth, and ninth authors: Department of Plant Pathology, University of Florida, Gainesville 32611; first, second, and tenth authors: Gulf Coast Research and Education Center, University of Florida, Balm 33598; third and fifth authors: Department of Plant Pathology, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster 44691; fourth and sixth authors: North Florida Research and Education Center, Quincy 32251; and eighth author: Emerging Pathogens Institute, University of Florida, Gainesville 32610
| | - Erica M Goss
- First, fourth, seventh, eighth, and ninth authors: Department of Plant Pathology, University of Florida, Gainesville 32611; first, second, and tenth authors: Gulf Coast Research and Education Center, University of Florida, Balm 33598; third and fifth authors: Department of Plant Pathology, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster 44691; fourth and sixth authors: North Florida Research and Education Center, Quincy 32251; and eighth author: Emerging Pathogens Institute, University of Florida, Gainesville 32610
| | - Jeffrey B Jones
- First, fourth, seventh, eighth, and ninth authors: Department of Plant Pathology, University of Florida, Gainesville 32611; first, second, and tenth authors: Gulf Coast Research and Education Center, University of Florida, Balm 33598; third and fifth authors: Department of Plant Pathology, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster 44691; fourth and sixth authors: North Florida Research and Education Center, Quincy 32251; and eighth author: Emerging Pathogens Institute, University of Florida, Gainesville 32610
| | - Gary E Vallad
- First, fourth, seventh, eighth, and ninth authors: Department of Plant Pathology, University of Florida, Gainesville 32611; first, second, and tenth authors: Gulf Coast Research and Education Center, University of Florida, Balm 33598; third and fifth authors: Department of Plant Pathology, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster 44691; fourth and sixth authors: North Florida Research and Education Center, Quincy 32251; and eighth author: Emerging Pathogens Institute, University of Florida, Gainesville 32610
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