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Plant Pathology Journal
Year: 2015  |  Volume: 14  |  Issue: 1  |  Page No.: 38 - 43

Phenotypic Fingerprints of Ralstonia solanacearum Biovar 3 Strains from Tobacco and Tomato in China Assessed by Phenotype MicroArray Analysis

Hancheng Wang, Yanfei Huang, Jin Wang, Maosheng Wang, Haiqian Xia and Hongxue Lu    

Abstract: Ralstonia solanacearum that causing devastating disease in Solanaceae crops, is a notorious pathogen worldwide. A collection of the pathogen originating from tobacco and tomato in China was analyzed by using BIOLOG Phenotype MicroArray (PM) and assigned to biovar. Phenotypic fingerprints of two different original strains were also compared to explore their phenotypic diversities. All tested isolates of Ralstonia solanacearum oxidized both disaccharides and sugar alcohols and assigned to biovar 3. Using PM plates 1 to 8, 758 different assays were tested, including 190 different carbon substrates, 95 nitrogen substrates, 59 phosphorus substrates, 35 sulfur substrates, 94 biosynthetic pathways and 285 nitrogen pathways. Phenotypic fingerprints of the pathogen from tobacco and tomato were nearly the same. Ralstonia solanacearum was able to utilize 19% of tested carbon substrates, 43% of nitrogen substrates, 100% of sulfur substrates and 95% of phosphorus substrates. Most informative utilization ways for carbon substrates were organic acids and carbohydrates and for nitrogen were various amino acids. Those findings showed useful information for biology and physiology study of R. solanacearum.

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