The Plant Pathology Journal

The Korean Society of Plant Pathology (한국식물병리학회)
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Global Transcriptome Profiling of Xanthomonas oryzae pv. oryzae under in planta Growth and in vitro Culture Conditions

  • Lee, So Eui (Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University) ;
  • Gupta, Ravi (Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University) ;
  • Jayaramaiah, Ramesha H. (Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University) ;
  • Lee, Seo Hyun (Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University) ;
  • Wang, Yiming (Department of Plant Microbe Interactions, Max Planck Institute for Plant Breeding Research) ;
  • Park, Sang-Ryeol (National Institute of Agricultural Science, Rural Development Administration) ;
  • Kim, Sun Tae (Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University)
  • Received : 2017.04.06
  • Accepted : 2017.06.13
  • Published : 2017.10.01
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Abstract

Xanthomonas oryzae pv. oryzae (Xoo), the causative agent of bacterial blight, is a major threat to rice productivity. Here, we performed RNA-Seq based transcriptomic analysis of Xoo transcripts isolated under in planta growth (on both susceptible and resistant hosts) and in vitro culture conditions. Our in planta extraction method resulted in successful enrichment of Xoo cells and provided RNA samples of high quality. A total of 4,619 differentially expressed genes were identified between in planta and in vitro growth conditions. The majority of the differentially expressed genes identified under in planta growth conditions were related to the nutrient transport, protease activity, stress tolerance, and pathogenicity. Among them, over 1,300 differentially expressed genes were determined to be secretory, including 184 putative type III effectors that may be involved in Xoo pathogenicity. Expression pattern of some of these identified genes were further validated by semi-quantitative RT-PCR. Taken together, these results provide a transcriptome overview of Xoo under in planta and in vitro growth conditions with a focus on its pathogenic processes, deepening our understanding of the behavior and pathogenicity of Xoo.

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References

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