Analysis of RNA-mediated virus resistance by NSs and NSm gene sequences from Tomato spotted wilt virus

Shoji Sonoda, Hisaaki Tsumuki

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Nicotiana benthamiana was transformed with the NSs gene sequence of Tomato spotted wilt virus (TSWV). When a non-silenced line showing high levels of the transgene expression was inoculated with Potato virus X (PVX) engineered to contain the NSs gene sequences, reduced transgene mRNA accumulation was observed. RNA silencing was the underlying mechanism for the reduction. Previously, non-transgenic N. benthamiana infected with PVX engineered to contain the nucleocapsid protein (N) gene of TSWV was shown to be resistant to TSWV infection [Plant Sci. 164 (2003) 717]. In the present study, interactions between PVX engineered to contain the NSs gene sequences and TSWV were examined. Plants infected with PVX containing the NSs gene sequences showed a partial virus resistance to TSWV. However, the degree of the resistance was apparently lower than that observed in plants infected with PVX engineered to contain the N gene. Similar low levels of the resistance to TSWV was observed in plants infected with PVX engineered to contain the NSm gene of TSWV. These results suggest that RNA-mediated virus resistance conferred by the NSs and NSm gene sequences of TSWV was less effective to TSWV. Furthermore, it was also suggested that RNA-mediated virus resistance was affected by viral genes or sequences rather than the amount of nucleotide sequence homology.

Original languageEnglish
Pages (from-to)771-778
Number of pages8
JournalPlant Science
Volume166
Issue number3
DOIs
Publication statusPublished - Mar 2004

Keywords

  • Cross-protection
  • Nicotiana benthamiana
  • RNA silencing
  • TSWV
  • Virus resistance

ASJC Scopus subject areas

  • Genetics
  • Agronomy and Crop Science
  • Plant Science

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