title: Sucrose-induced anthocyanin accumulation in vegetative tissue of Petunia plants requires anthocyanin regulatory transcription factors.
abstract: The effects of three different sucrose concentrations on plant growth and anthocyanin accumulation were examined in non-transgenic (NT) and transgenic (T2) specimens of the Petunia hybrida cultivar 'Mirage rose' that carried the anthocyanin regulatory transcription factors B-Peru+mPAP1 or RsMYB1. Anthocyanin accumulation was not observed in NT plants in any treatments, whereas a range of anthocyanin accumulation was observed in transgenic plants. The anthocyanin content detected in transgenic plants expressing the anthocyanin regulatory transcription factors (B-Peru+mPAP1 or RsMYB1) was higher than that in NT plants. In addition, increasing sucrose concentration strongly enhanced anthocyanin content as shown by quantitative real-time polymerase chain reaction (qRT-PCR) analysis, wherein increased concentrations of sucrose enhanced transcript levels of the transcription factors that are responsible for the induction of biosynthetic genes involved in anthocyanin synthesis; this pattern was not observed in NT plants. In addition, sucrose affected plant growth, although the effects were different between NT and transgenic plants. Taken together, the application of sucrose could enhance anthocyanin production in vegetative tissue of transgenic Petunia carrying anthocyanin regulatory transcription factors, and this study provides insights about interactive effects of sucrose and transcription factors in anthocyanin biosynthesis in the transgenic plant.
authors.affiliation: Department of Horticultural Science, Kyungpook National University, Daegu 702-701, Republic of Korea; School of Agriculture and Aquaculture, Tra Vinh University, Tra Vinh, Viet Nam.
authors.forename: Trinh Ngoc
authors.initials: TN
authors.lastname: Ai
authors.affiliation: Department of Horticultural Science, Kyungpook National University, Daegu 702-701, Republic of Korea. Electronic address: aunghtaynaing2005@gmail.com.
authors.forename: Aung Htay
authors.initials: AH
authors.lastname: Naing
authors.affiliation: Department of Horticultural Science, Kyungpook National University, Daegu 702-701, Republic of Korea.
authors.forename: Muthukrishnan
authors.initials: M
authors.lastname: Arun
authors.affiliation: National Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea.
authors.forename: Sun-Hyung
authors.initials: SH
authors.lastname: Lim
authors.affiliation: Department of Horticultural Science, Kyungpook National University, Daegu 702-701, Republic of Korea. Electronic address: ckkim@knu.ac.kr.
authors.forename: Chang Kil
authors.initials: CK
authors.lastname: Kim
mesh_terms: D000872:Anthocyanins / Q000096:biosynthesis / Q000235:genetics* / Q000378:metabolism; D018506:Gene Expression Regulation, Plant; D032306:Petunia / Q000187:drug effects / Q000235:genetics* / Q000254:growth & development; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D030821:Plants, Genetically Modified / Q000254:growth & development / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D013395:Sucrose / Q000494:pharmacology*; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism / Q000502:physiology*
chemical_list: D000872:Anthocyanins; D010940:Plant Proteins; D012333:RNA, Messenger; D014157:Transcription Factors; D013395:Sucrose
keywords: Anthocyanin; Plant growth; RT-PCR; Transcription factors; Transgenic plant