@article{mbs:/content/journal/jgv/10.1099/0022-1317-82-5-1239, author = "Teycheney, Pierre-Yves and Tepfer, Mark", title = "Virus-specific spatial differences in the interference with silencing of the chs-A gene in non-transgenic petunia", journal= "Journal of General Virology", year = "2001", volume = "82", number = "5", pages = "1239-1243", doi = "https://doi.org/10.1099/0022-1317-82-5-1239", url = "https://www.microbiologyresearch.org/content/journal/jgv/10.1099/0022-1317-82-5-1239", publisher = "Microbiology Society", issn = "1465-2099", type = "Journal Article", abstract = "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.", }