Functional characterization of key structural genes in rice flavonoid biosynthesis.

Planta
Chun Hat ShihClive Lo

Abstract

Rice is a model system for monocot but the molecular features of rice flavonoid biosynthesis have not been extensively characterized. Rice structural gene homologs encoding chalcone synthase (CHS), chalcone isomerase (CHI), flavanone 3-hydroxylase (F3H), flavonoid 3'-hydroxylase (F3'H), dihydroflavonol 4-reductase (DFR), and anthocyanidin synthase (ANS) were identified by homology searches. Unique differential expression of OsF3H, OsDFR, and OsANS1 controlled by the Pl(w) locus, which contains the R/B-type regulatory genes OSB1 and OSB2, was demonstrated during light-induced anthocyanin accumulation in T65-Plw seedlings. Previously, F3H genes were often considered as early genes co-regulated with CHS and CHI genes in other plants. In selected non-pigmented rice lines, OSB2 is not expressed following illumination while their expressed OSB1sequences all contain the same nucleotide change leading to the T(64) M substitution within the conserved N-terminal interacting domain. Furthermore, the biochemical roles of the expressed rice structural genes (OsCHS1, OsCHI, OsF3H, and OsF3'H) were established in planta for the first time by complementation in the appropriate Arabidopsis transparent testa mutants. Using yeast two-hybrid analy...Continue Reading

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Citations

Mar 16, 2012·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Tian ShaoQiong Luo
Mar 19, 2013·Journal of Molecular Evolution·E K KhlestkinaE A Salina
Jul 25, 2013·Biotechnology Letters·Zehou LiuYuming Wei
Jun 21, 2012·Journal of Agricultural and Food Chemistry·Qingpo Liu, Hengmu Zhang
Nov 22, 2013·Proceedings of the National Academy of Sciences of the United States of America·Liang GongJie Luo
Jul 11, 2014·Plant & Cell Physiology·Marc GallandLoïc Rajjou
Jan 11, 2012·The Plant Journal : for Cell and Molecular Biology·Fumio MatsudaKazuki Saito
Mar 15, 2015·Food Chemistry·Yafang Shao, Jinsong Bao
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Nov 7, 2019·International Journal of Genomics·Rabiatul-Adawiah Zainal-AbidinZeti-Azura Mohamed-Hussein

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