TRANSPARENT TESTA GLABRA 1-Dependent Regulation of Flavonoid Biosynthesis

Bipei Zhang; Andrea Schrader

doi:10.3390/plants6040065

TRANSPARENT TESTA GLABRA 1-Dependent Regulation of Flavonoid Biosynthesis

Plants (Basel). 2017 Dec 20;6(4):65. doi: 10.3390/plants6040065.

Authors

Bipei Zhang¹, Andrea Schrader²

Affiliations

¹ Botanical Institute, University of Cologne, Zuelpicher Str 47B, 50674 Cologne, Germany. bzhang1@smail.uni-koeln.de.
² Botanical Institute, University of Cologne, Zuelpicher Str 47B, 50674 Cologne, Germany. Andrea.Schrader@uni-koeln.de.

Abstract

The flavonoid composition of various tissues throughout plant development is of biological relevance and particular interest for breeding. Arabidopsis thaliana TRANSPARENT TESTA GLABRA 1 (AtTTG1) is an essential regulator of late structural genes in flavonoid biosynthesis. Here, we provide a review of the regulation of the pathway's core enzymes through AtTTG1-containing R2R3-MYELOBLASTOSIS-basic HELIX-LOOP-HELIX-WD40 repeat (MBW(AtTTG1)) complexes embedded in an evolutionary context. We present a comprehensive collection of A. thalianattg1 mutants and AtTTG1 orthologs. A plethora of MBW(AtTTG1) mechanisms in regulating the five major TTG1-dependent traits is highlighted.

Keywords: Arabidopsis thaliana; MBW complex; MYB; TRANSPARENT TESTA GLABRA 1; TTG1; WD40; bHLH; flavonoid biosynthesis.

Publication types

Review