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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.1
- 수록면
- 49 - 61 (13page)
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초록· 키워드
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Flavonoids are a group of metabolites in Ginkgo biloba thought to provide health benefits. R2R3-MYB transcription factors (TFs) play key roles in the transcriptional regulation of the flavonoid biosynthesis in plants. In this study, an R2R3-MYB transcription factor gene, GbMYBFL, was isolated from G. biloba and characterized. Results of bioinformatic analysis indicated that GbMYBFL is more closely related to the R2R3-MYB involved in flavonoid biosynthesis and displayed high similarity to MYB from other plants. The genmomic sequence of GbMYBFL had three exons and two introns, with its upstream sequence containing cis-acting regulatory elements Myb binding site, Myc recognition sites, and light, SA, MeJA responsive elements. Subcellular localization analysis indicates that GbMYBFL was located in the nucleus. Quantitative realtime PCR revealed that GbMYBFL was expressed in leaves, stems, roots, young fruits, male flower and female flower, and the level of transcription in male flower and leaves were higher than that in female flower, stems, roots, and young fruits. During G. biloba leaf growth, the transcription of GbMYBFL is positively correlated with the flavonoid content, suggesting that the GbMYBFL is involved in the flavonoid biosynthesis. Overexpression of GbMYBFL under the control of the CaMV35S promoter in Ginkgo callus notably enhanced the accumulation of flavonoids and anthocyanin compared with non-transformed callus. This finding suggested that GbMYBFL positively related to flavonoid biosynthesis, and the overexpression of GbMYBFL was sufficient to induce flavonoids and anthocyanin accumulation.
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참고문헌 (79)
참고문헌 신청
Abe H / 2003 / Arabidopsis AtMYC2 (bHLH) and AtMYB2 (MYB) function as transcriptional activators in abscisic acid signaling / Plant cell 15:63~78
Aharoni A / 2001 / The strawberry FaMYB1 transcription factor suppresses anthocyanin and flavonol accumulation in transgenic tobacco / Plant J 28:319~332
Bai Y-C / 2014 / Characterization of two tartary buckwheat R2R3-MYB transcription factors and their regulation of proanthocyanidin biosynthesis / Physiol Plant 152:431~440
Ban Y / 2007 / Isolation and functional analysis of a MYB transcription factor gene that is a key regulator for the development of red coloration in apple skin / Plant Cell Physiol 48:958~970
Bogs J / 2007 / The grapevine transcription factor VvMYBPA1 regulates proanthocyanidin synthesis during fruit development / Plant Physiol 143:1347~1361
Aharoni A / 2001 / The strawberry FaMYB1 transcription factor suppresses anthocyanin and flavonol accumulation in transgenic tobacco / Plant J 28:319~332
Bai Y-C / 2014 / Characterization of two tartary buckwheat R2R3-MYB transcription factors and their regulation of proanthocyanidin biosynthesis / Physiol Plant 152:431~440
Ban Y / 2007 / Isolation and functional analysis of a MYB transcription factor gene that is a key regulator for the development of red coloration in apple skin / Plant Cell Physiol 48:958~970
Bogs J / 2007 / The grapevine transcription factor VvMYBPA1 regulates proanthocyanidin synthesis during fruit development / Plant Physiol 143:1347~1361
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