Virus-specific spatial differences in the interference with silencing of the chs-A gene in non-transgenic petunia

Teycheney Pierre-Yves, Tepfer Mark. 2001. Virus-specific spatial differences in the interference with silencing of the chs-A gene in non-transgenic petunia. Journal of General Virology, 82 (5) : 1239-1243.

Résumé : Potyviruses, such as potato virus Y and tobacco etch virus, as well as cucumber mosaic cucumovirus, interfere with post-transcriptional gene silencing (PTGS). When RedStar-type Petunia hybrida cultivars, whose flowers have alternating white and pigmented sectors, were infected with these viruses, each virus induced a different pattern of restoration of floral anthocyanin pigmentation. Local reversion to coloured phenotypes in the white sectors, which occurred through interference with PTGS of the chalcone synthase A (chs-A) gene, was correlated with locally increased levels of chs-A mRNA and virus concentration. Our results show that virus infection can interfere with PTGS of a native plant gene, and that this can have profound effects on symptom expression.

Mots-clés Agrovoc : Petunia, virus des végétaux, Potyvirus, gène, arn messager, infection, expression des gènes

Classification Agris : H20 - Maladies des plantes
F30 - Génétique et amélioration des plantes

Auteurs et affiliations

• Teycheney Pierre-Yves, CIRAD-FLHOR-BPA (GLP) ORCID: 0000-0002-9754-0745
• Tepfer Mark, INRA (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/490403/)

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