Journal of General Plant Pathology

, Volume 71, Issue 1, pp 90–94 | Cite as

Timing and extent of hypersensitive response are critical to restrict local and systemic spread of Pepper mild mottle virus in pepper containing the L3 gene

  • Hiroyuki Hamada
  • Shigeharu Takeuchi
  • Akinori Kiba
  • Shinya Tsuda
  • Kazumi Suzuki
  • Yasufumi Hikichi
  • Tetsuro Okuno
VIRAL AND VIROID DISEASES Short communication

Abstract

Amino acid changes in Pepper mild mottle virus (PMMoV) coat protein (CP) that enhance, decrease, or nullify the resistance-inducing activity in Capsicum plants carrying the L3 gene have been identified. In this study, molecular events underlying the L3-gene-mediated resistance were analyzed through the expression of hypersensitive response (HR)-related genes, HSR203J-Cc and HIN1-Cc, and defense-related genes, PR1-Cc and PR4b-Cc, upon infection with PMMoV CP mutants. The expression kinetics of the genes correlated with the degree of restriction of virus distribution in the inoculated leaves. The results suggest that the timing and extent of HR are critical factors to restrict virus spread both locally and systemically in L3-gene-mediated resistance.

Key words

Pepper mild mottle virus Capsicum chinense L3 gene Hypersensitive response Virus resistance 

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Copyright information

© The Phytopathological Society of Japan and Springer-Verlag Tokyo 2005

Authors and Affiliations

  • Hiroyuki Hamada
    • 1
  • Shigeharu Takeuchi
    • 2
  • Akinori Kiba
    • 1
  • Shinya Tsuda
    • 3
  • Kazumi Suzuki
    • 4
  • Yasufumi Hikichi
    • 1
  • Tetsuro Okuno
    • 5
  1. 1.Laboratory of Plant Pathology and Biotechnology, Faculty of AgricultureKochi UniversityKochiJapan
  2. 2.Laboratory of Plant PathologyKochi Agricultural Research CenterKochiJapan
  3. 3.National Agriculture Research CenterTsukubaJapan
  4. 4.Iwate Biotechnology Research CenterIwateJapan
  5. 5.Laboratory of Plant Pathology, Graduate School of AgricultureKyoto UniversityKyotoJapan

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