Excision of Transposable Elements from the Chalcone Isomerase and Dihydroflavonol 4-Reductase Genes May Contribute to the Variegation of the Yellow-Flowered Carnation (Dianthus caryophyllus)
2002; Oxford University Press; Volume: 43; Issue: 5 Linguagem: Inglês
10.1093/pcp/pcf065
ISSN1471-9053
AutoresYoshio Itoh, Daisuke Higeta, Akane Suzuki, Hiroyuki Yoshida, Yoshihiro Ozeki,
Tópico(s)Photosynthetic Processes and Mechanisms
ResumoIn the 'Rhapsody' cultivar of the carnation, which bears white flowers variegated with red flecks and sectors, a transposable element, dTdic1, belonging to the Ac/Ds superfamily, was found within the dihydroflavonol 4-reductase (DFR) gene. The red flecks and sectors of 'Rhapsody' may be attributable to a reversion to DFR activity after the excision of dTdic1. The yellow color of the carnation petals is attributed to the synthesis and accumulation of chalcone 2′-glucoside. In several of the carnation cultivars that bear yellow flowers variegated with white flecks and sectors, both the chalcone isomerase (CHI) and DFR genes are disrupted by dTdic1.
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