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Characterization of an activation‐tagged mutant uncovers a role of GLABRA2 in anthocyanin biosynthesis in Arabidopsis
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Xiaoyu Wang Xianling Wang Qingnan Hu Xuemei Dai Hainan Tian Kaijie Zheng Xiaoping Wang Tonglin Mao Jin‐Gui Chen Shucai Wang 《The Plant journal : for cell and molecular biology》2015,83(2):300-311
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Sugar-hormone cross-talk in anthocyanin biosynthesis 总被引:1,自引:0,他引:1
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Li-Wei Chiu Xiangjun Zhou Sarah Burke Xianli Wu Ronald L. Prior Li Li 《Plant physiology》2010,154(3):1470-1480
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Recent advances in the transcriptional regulation of the flavonoid biosynthetic pathway 总被引:10,自引:0,他引:10
Hichri I Barrieu F Bogs J Kappel C Delrot S Lauvergeat V 《Journal of experimental botany》2011,62(8):2465-2483
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Arabidopsis TRANSPARENT TESTA GLABRA2 is directly regulated by R2R3 MYB transcription factors and is involved in regulation of GLABRA2 transcription in epidermal differentiation 总被引:6,自引:0,他引:6
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Ishida T Hattori S Sano R Inoue K Shirano Y Hayashi H Shibata D Sato S Kato T Tabata S Okada K Wada T 《The Plant cell》2007,19(8):2531-2543
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花青素转录因子调控机制及代谢工程研究进展 总被引:2,自引:0,他引:2
花青素是广泛存在于植物中的一类重要的类黄酮化合物, 在植物生长发育和人类营养保健方面具有重要价值。花青素的生物合成途径已经解析得比较清楚, 但花青素的代谢调控网络还在不断完善。调控花青素生物合成的转录因子主要包括MYB、bHLH和WD40三大类, 这些转录因子通过激活或抑制CHS、ANS和DFR等花青素途径关键结构基因的表达水平, 进而决定花青素积累的部位与水平。该文结合国内外花青素生物合成与转录调控方面的研究进展, 简要介绍了花青素的生物合成途径, 归纳总结了模式植物中花青素代谢调控的分子机理, 尤其是MYB、bHLH和WD40三类主要转录因子的调控机理, 以及这些转录因子在观赏植物和水果等经济作物花青素代谢工程中的应用。该文将为系统阐明花青素的转录调控机制和利用代谢工程改良花青素的相关研究提供有益参考。 相似文献
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Baudry A Caboche M Lepiniec L 《The Plant journal : for cell and molecular biology》2006,46(5):768-779
The control of TT8 expression was investigated in this study, and it was demonstrated that it constitutes a major regulatory step in the specific activation of the expression of flavonoid structural genes. First, the GUS activity generated in planta from a TT8::uidA construct revealed cell-specific activation of the TT8 promoter consistent with the known involvement of the TT8 bHLH factor in proanthocyanidin, anthocyanin and mucilage biosynthesis. Moreover, the activity of this reporter construct was strongly affected in ttg1, TT2 overexpressers (OE), and PAP1-OE, suggesting interplay between TT2, PAP1, TTG1 and the activation of the TT8 promoter in planta. To further investigate the mechanisms involved, we used 35S::TT2-GR and 35S::TTG1-GR transgenic plants (expressing fusion proteins with the glucocorticoid receptor), as well as one-hybrid experiments, to determine the direct effect of these factors on TT8 expression. Interestingly, in vivo binding of TT2 and PAP1 to the TT8 promoter was dependent on the simultaneous expression of TT8 or the homologous bHLH factors GL3 and EGL3. Consistent with these results, the activity of the TT8::uidA reporter was strongly affected in the seed endothelium of a tt8 mutant. Similarly, a strong decrease in the level of TT8 mRNA was detected in the siliques of a gl3 x egl3 mutant and in plants that express a dominant negative form of the PAP1 protein, suggesting that TT8 expression is controlled by different combinations of MYB and bHLH factors in planta. The importance of this positive feedback mechanism in the strong and specific induction of proanthocyanidin biosynthesis in the seed coat of Arabidopsis thaliana is discussed. 相似文献
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