Tobacco plants transformed with an untranslatable form of the coat protein gene of the Potato virus Y are resistant to viral infection

Khaled Masmoudi, Ines Yacoubi, Afif Hassairi, Lobna Naeit Elarbi, Radhouane Ellouz

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The coat protein (CP) gene of the Potato virus Y common strain (PVYo), rendered untranslatable by introduction of a stop codon immediately after the initiation codon, was cloned into an Agrobacterium tumefaciens transformation vector. The regenerated transgenic tobacco plants were analyzed for the presence of the CP gene. Although transgene transcripts were observed in all transgenic lines tested, three different phenotypes of resistance were observed, including high resistance, partial resistance, and susceptibility. An inverse correlation between the transgene transcript steady-state levels and resistance of transgenic plants to PVYo was observed. The results obtained suggest that the resistance observed in the transgenic plants is essentially due to the presence of multiple PVY transgenes that accumulate low levels of the transgene transcript. A post-transcriptional RNA degradation process appears to support the transgene transcript reduction within the RNA-mediated resistance mechanism.

Original languageEnglish
Article number395261
Pages (from-to)285-292
Number of pages8
JournalEuropean Journal of Plant Pathology
Volume108
Issue number4
DOIs
Publication statusPublished - 2002
Externally publishedYes

Keywords

  • RNA stability
  • RNA-mediated resistance
  • Transgenic plant
  • Virus resistance

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science
  • Horticulture

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