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

International Journal of Molecular Sciences

Ping’an Ma¹  Chen Liu²  Xingyu Jiang²  Wenquan Wang³  Changying Zeng³  Xin Chen³  Shengkui Zhang³ 

[1] College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China;Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China;The Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China;

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

DOI  :  10.3390/ijms19051281

来源: DOAJ

【 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.

【 授权许可】

Unknown