Transcription coactivator Arabidopsis ANGUSTIFOLIA3 modulates anthocyanin accumulation and light-induced root elongation through transrepression of Constitutive Photomorphogenic1

被引：39

作者：

Meng, Lai-Sheng ^{[1
]}

机构：

[1] Univ Sci & Technol China, Sch Life Sci, Hefei 230027, Peoples R China

来源：

PLANT CELL AND ENVIRONMENT | 2015年 / 38卷 / 04期

关键词：

light signalling; root growth; HUMAN SYNOVIAL SARCOMA; GENE-EXPRESSION; DROUGHT TOLERANCE; STOMATAL DENSITY; CRYPTOCHROME; PHYTOCHROME B; PROTEIN; GROWTH; COP1; INDUCTION;

D O I：

10.1111/pce.12456

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

ANGUSTIFOLIA3 (AN3), a transcription coactivator, is implicated in modulating cell proliferation. In this study, I found that AN3 is a novel regulator of anthocyanin biosynthesis and light-induced root elongation. Seedlings and seeds lacking AN3 activity presented significantly reduced anthocyanin accumulation and light-induced root elongation, whereas those of transgenic plants harbouring the 35S:AN3 construct exhibited increased anthocyanin accumulation. AN3 is required for the proper expression of other genes that affect anthocyanin accumulation and light-induced root elongation, ConstitutivePhotomorphogenic1 (COP1), encoding a RING motif - containing E3 ubiquitin ligase. AN3 was associated with COP1 promoter in vivo. Thus, AN3 may act with other proteins that bind to COP1 promoter to promote anthocyanin accumulation and inhibit light-induced root elongation.

引用

页码：838 / 851

页数：14