Advances on Transcriptional Activator AtWRI1 of Arabidopsis

doi:10.13560/j.cnki.biotech.bull.1985.2016.06.004

Abstract

Abstract: As lipid has high economic value，studying the regulation process in oil biosynthesis is of great significance. WRI1，a transcriptional activator，plays a key role in this process. This paper focuses on its identification and structural characteristics，expression pattern，function and the regulation mechanism of AtWRII. It belongs to AP2 subtribe of AP2/EREB family and has 7 exons. It expresses at different developmental stages of each organ，and the expressional level reaches the maximum at the oil synthesis stage of seeds. Through binding corresponding cis-function components，it activates the transcription of genes involving in glycolysis and fatty acid synthesis，and consequently promotes the oil synthesis. AtWRII is one of the downstream genes of AtLEC1 and AtLEC2. Mediated by CRL3-BPM complex，AtWRI1 is degraded via ubiquitin-26S proteasome pathway.

Key words: oil synthesis, AtWRI1, expression pattern, transcriptional activation, regulation mechanism

YANG Xian-you, HUANG You-jun, ZHANG Tong, HUANG Chun-ying. Advances on Transcriptional Activator AtWRI1 of Arabidopsis[J]. Biotechnology Bulletin, 2016, 32(6): 13-18.

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