Functional differentiation of Lotus japonicus TT2s, R2R3-MYB transcription factors comprising a multigene family

Plant & Cell Physiology
Kazuko YoshidaMasaaki Sakuta

Abstract

Leguminous plants have many paralogous genes encoding enzymes involved in the flavonoid biosynthetic pathway. Duplicate genes are predicted to contribute to the production of various flavonoid compounds and to have resulted in a diversity of legume species. We identified gene duplication in the transcription factors regulating flavonoid biosynthesis in the model legume Lotus japonicus. Three copies of a homolog of Arabidopsis thaliana TRANSPARENT TESTA2 (TT2), which is a MYB transcription factor that regulates proanthocyanidin biosynthesis, were present in the L. japonicus genome. The organ specificity and stress responsiveness differed among the three LjTT2s, and correlations between proanthocyanidin accumulation and the expression levels of LjTT2s were observed during seedling development. Moreover, three LjTT2s functionally complemented TT2 in transient expression experiments in A. thaliana leaf cells. The different reporter activity caused by LjTT2a was consistent with the affinity of physical interactions with TT8 and TTG1 in yeast two-hybrid experiments as well as the branching pattern of the phylogenetic tree. These results suggest that LjTT2 factors have diverse functions in the tissues in which they are expressed; in p...Continue Reading

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Citations

Mar 27, 2010·Journal of Plant Research·Kazuko YoshidaMasaaki Sakuta
Dec 28, 2010·Nature Genetics·Vladimir ShulaevKevin M Folta
Nov 3, 2010·Journal of Experimental Botany·Francesco PaolocciFrancesco Damiani
Feb 1, 2011·Journal of Experimental Botany·Imène HichriVirginie Lauvergeat
May 8, 2010·Plant & Cell Physiology·Kazuko YoshidaMasaaki Sakuta
Sep 4, 2009·Plant Physiology·Marc LibaultGary Stacey
Dec 29, 2012·International Journal of Molecular Sciences·Wenjun HuangYing Wang
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Mar 26, 2015·Applied Microbiology and Biotechnology·Meiliang ZhouYanmin Wu
Feb 12, 2021·Journal of Plant Research·Toshio AokiTomoyoshi Akashi
Oct 13, 2009·Plant Signaling & Behavior·Robin D Mellway, C Peter Constabel
Sep 4, 2021·Journal of Plant Research·Masaaki SakutaSetsuko Shimada
Nov 29, 2011·Plant Science : an International Journal of Experimental Plant Biology·Francisco J EscarayOscar A Ruiz

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