Ethylene Responsive Factor MeERF72 Negatively Regulates Sucrose synthase 1 Gene in Cassava

文献类型： 外文期刊

第一作者： Liu, Chen

作者： Liu, Chen;Jiang, Xingyu;Liu, Chen;Chen, Xin;Zhang, Shengkui;Zeng, Changying;Wang, Wenquan;Liu, Chen;Chen, Xin;Zhang, Shengkui;Zeng, Changying;Wang, Wenquan;Ma, Ping'an;Zhang, Shengkui

作者机构：

关键词： cassava; starch; sucrose synthase; gene regulation; transcription factor

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN： 1422-0067

年卷期： 2018 年 19 卷 5 期

页码：

收录情况： SCI

摘要： Cassava, an important food and industrial crop globally, is characterized by its powerful starch accumulation in its storage root. However, the underlying molecular mechanism for this feature remains unclear. Sucrose synthase initializes the conversion of sucrose to starch, and, to a certain extent, its enzyme activity can represent sink strength. To understand the modulation of MeSus gene family, the relatively high expressed member in storage root, MeSus1, its promoter was used as bait to screen cassava storage root full-length cDNA library through a yeast one-hybrid system. An ethylene responsive factor cDNA, designated as MeERF72 according to its homolog in Arabidopsis, was screened out. The transcript level of MeERF72 was induced by ethylene, drought, and salt treatments and repressed by abscisic acid, Auxin, gibberellin, salicylic acid, and low and high temperatures. The MeERF72 protein has a conserved APETALA2 domain in its N-terminus and an activated domain of 30 amino acids in its C-terminus, can bind to MeSus1 promoter in vitro and in vivo, and represses the promoter activity of MeSus1. MeERF72 is a transcription factor that can negatively regulate the expression level of MeSus1 in cassava.

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