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MYB12 and MYB22 play essential roles in proanthocyanidin and flavonol synthesis in red‐fleshed apple (Malus sieversii f. niedzwetzkyana)
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Nan Wang Haifeng Xu Shenghui Jiang Zongying Zhang Ninglin Lu Huarong Qiu Changzhi Qu Yicheng Wang Shujing Wu Xuesen Chen 《The Plant journal : for cell and molecular biology》2017,90(2):276-292
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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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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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Appelhagen I Lu GH Huep G Schmelzer E Weisshaar B Sagasser M 《The Plant journal : for cell and molecular biology》2011,67(3):406-419
Wild type seed coats of Arabidopsis thaliana are brown due to the accumulation of proanthocyanidin pigments (PAs). The pigmentation requires activation of phenylpropanoid biosynthesis genes and mutations in some of these genes cause a yellow appearance of seeds, termed transparent testa (tt) phenotype. The TT1 gene encodes a WIP‐type zinc finger protein and is expressed in the seed coat endothelium where most of the PAs accumulate in wild type plants. In this study we show that TT1 is not only required for correct expression of PA‐specific genes in the seed coat, but also affects CHS, encoding the first enzyme of flavonoid biosynthesis. Many steps of this pathway are controlled by complexes of MYB and BHLH proteins with the WD40 factor TTG1. We demonstrate that TT1 can interact with the R2R3 MYB protein TT2 and that ectopic expression of TT2 can partially restore the lack in PA production in tt1. Reduced seed coat pigmentation was obtained using a TT1 variant lacking nuclear localisation signals. Based on our results we propose that the TT2/TT8/TTG1 regulon may also comprise early genes like CHS and discuss steps to further unravel the regulatory network controlling flavonoid accumulation in endothelium cells during A. thaliana seed development. 相似文献
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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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AtMYB4: a transcription factor general in the battle against UV 总被引:3,自引:0,他引:3
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Identification of key amino acids for the evolution of promoter target specificity of anthocyanin and proanthocyanidin regulating MYB factors 总被引:1,自引:0,他引:1
Simon C. Heppel Felix W. Jaffé Adam M. Takos Swen Schellmann Thomas Rausch Amanda R. Walker Jochen Bogs 《Plant molecular biology》2013,82(4-5):457-471
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