Components of the Arabidopsis autonomous floral promotion pathway, FCA and FY, are conserved in monocots

Functional Plant Biology : FPB
Somrutai WinichayakulR Macknight

Abstract

The autonomous floral promotion pathway plays a key role in regulating the flowering time of the model dicot Arabidopsis thaliana (L.) Heynh. To investigate whether this pathway is present in monocots, two autonomous pathway components, FCA and FY, were isolated from rice (Oryza sativa L.) and ryegrass (Lolium perenne L.). The predicted FCA proteins (OsFCA and LpFCA) are highly conserved over the RNA-binding and WW protein interaction domains, and the FY proteins (OsFY and LpFY) possess highly conserved WD repeats but a less well conserved C-terminal region containing Pro-Pro-Leu-Pro (PPLP) motifs. In Arabidopsis, FCA limits its own production by promoting the polyadenylation of FCA pre-mRNA within intron 3 to form a truncated transcript called FCA-β. The identification of FCA-β transcripts in rice and ryegrass indicates that equivalent mechanisms occur in monocots. FCA's autoregulation and flowering time functions require FCA to interact with the 3' end-processing factor, FY. The FCA WW domain from Arabidopsis, which is thought to recognise PPLP motifs, interacted with ryegrass FY protein in GST-pulldown assays. Together these results suggest that the FCA and FY genes in monocots have similar functions to the dicot flowering-t...Continue Reading

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Citations

Apr 16, 2008·Nucleic Acids Research·Yingjia ShenQingshun Quinn Li
Jun 23, 2010·Genetics and Molecular Research : GMR·X C LinW Fang
Jun 1, 2006·Functional Plant Biology : FPB·Qiusheng ZhangYingguo Zhu
Oct 22, 2005·Plant Molecular Biology·Jeong-Hwan LeeJeong-Kook Kim
Nov 19, 2010·Evolution; International Journal of Organic Evolution·Jill T AndersonThomas Mitchell-Olds

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Datasets Mentioned

BETA
C74748
Z82989
AP006062
BG411156
CA484866
AP003735

Methods Mentioned

BETA
acetylation
PCR
FCA
transgenic

Software Mentioned

BLAST
CODEHOP

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