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由VvMYBA1转录激活，并通过葡萄糖信号促进葡萄浆果表皮花青素积累。

Is Transcriptionally Activated by VvMYBA1 and Promotes Anthocyanin Accumulation of Grape Berry Skins via Glucose Signal.

作者信息

Sun Tianyu, Xu Lili, Sun Hong, Yue Qianyu, Zhai Heng, Yao Yuxin

机构信息

State Key Laboratory of Crop Biology, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Huang-Huai Region), Ministry of Agriculture, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, China.

出版信息

Front Plant Sci. 2017 Oct 20;8:1811. doi: 10.3389/fpls.2017.01811. eCollection 2017.

DOI:10.3389/fpls.2017.01811
PMID:29104582
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5655013/
Abstract

In this work, four () genes were identified in the grape genome. Among them, was strongly expressed in berry skin and its expression exhibited high correlations to anthocyanin content of berry skin during berry ripening and under ABA and UVB treatments. was transcriptionally activated directly by VvMYBA1, and overexpression promoted anthocyanin accumulation in berry skins and leaves; therefore, mediated VvMYBA1-regulated berry pigmentation. On the other hand, RNA-Seq analysis of WT and transgenic berry skins revealed that carbohydrate metabolism, flavonoid metabolism and regulation and solute carrier family expression were the most clearly altered biological processes. Further experiments elucidated that overexpression up-regulated the expression of the genes related to anthocyanin biosynthesis and transport via hexokinase-mediated glucose signal and thereby promoted anthocyanin accumulation in berry skins and leaves. Additionally, modifications of sugar status caused by enhanced hexokinase activities likely play a key role in induced sugar signaling.

摘要

在这项研究中，在葡萄基因组中鉴定出了四个（）基因。其中，在浆果表皮中强烈表达，并且在浆果成熟过程中以及ABA和UVB处理下，其表达与浆果表皮的花青素含量呈现高度相关性。被VvMYBA1直接转录激活，过表达促进了浆果表皮和叶片中的花青素积累；因此，介导了VvMYBA1调控的浆果色素沉着。另一方面，对野生型和转基因浆果表皮的RNA测序分析表明，碳水化合物代谢、类黄酮代谢与调控以及溶质载体家族表达是最明显改变的生物学过程。进一步的实验表明，过表达通过己糖激酶介导的葡萄糖信号上调了与花青素生物合成和转运相关基因的表达，从而促进了浆果表皮和叶片中的花青素积累。此外，由增强的己糖激酶活性引起的糖状态改变可能在诱导的糖信号传导中起关键作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/60d55b01c3a1/fpls-08-01811-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/fd08f4c80149/fpls-08-01811-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/46fef9064670/fpls-08-01811-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/f29ca33793ea/fpls-08-01811-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/16e7d0176354/fpls-08-01811-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/cd42c9184cf7/fpls-08-01811-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/ccb6a68176cc/fpls-08-01811-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/7d35936e5e08/fpls-08-01811-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/887c285f4c1f/fpls-08-01811-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/60d55b01c3a1/fpls-08-01811-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/fd08f4c80149/fpls-08-01811-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/46fef9064670/fpls-08-01811-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/f29ca33793ea/fpls-08-01811-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/16e7d0176354/fpls-08-01811-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/cd42c9184cf7/fpls-08-01811-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/ccb6a68176cc/fpls-08-01811-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/7d35936e5e08/fpls-08-01811-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/887c285f4c1f/fpls-08-01811-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0ae8/5655013/60d55b01c3a1/fpls-08-01811-g009.jpg

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