The embryonic leaf identity gene FUSCA3 regulates vegetative phase transitions by negatively modulating ethylene-regulated gene expression in Arabidopsis.

BMC Biology
Shelley LumbaSonia Gazzarrini

Abstract

The embryonic temporal regulator FUSCA3 (FUS3) plays major roles in the establishment of embryonic leaf identity and the regulation of developmental timing. Loss-of-function mutations of this B3 domain transcription factor result in replacement of cotyledons with leaves and precocious germination, whereas constitutive misexpression causes the conversion of leaves into cotyledon-like organs and delays vegetative and reproductive phase transitions. Herein we show that activation of FUS3 after germination dampens the expression of genes involved in the biosynthesis and response to the plant hormone ethylene, whereas a loss-of-function fus3 mutant shows many phenotypes consistent with increased ethylene signaling. This FUS3-dependent regulation of ethylene signaling also impinges on timing functions outside embryogenesis. Loss of FUS3 function results in accelerated vegetative phase change, and this is again partially dependent on functional ethylene signaling. This alteration in vegetative phase transition is dependent on both embryonic and vegetative FUS3 function, suggesting that this important transcriptional regulator controls both embryonic and vegetative developmental timing. The results of this study indicate that the embry...Continue Reading

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Citations

Jan 15, 2013·Plant Physiology·Fangfang Wang, Sharyn E Perry
Feb 22, 2012·BMC Biology·G Eric Schaller
Mar 19, 2013·Plant Molecular Biology·Rubina JibranPaul P Dijkwel
Jan 9, 2016·Current Opinion in Plant Biology·Jim P Fouracre, R Scott Poethig
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Apr 20, 2014·Frontiers in Plant Science·Allen Y-L Tsai, Sonia Gazzarrini
Mar 15, 2019·Journal of Experimental Botany·Muhammed Jamsheer KAshverya Laxmi
Sep 17, 2015·Essays in Biochemistry·Sonia Gazzarrini, Allen Yi-Lun Tsai
May 24, 2020·The Plant Journal : for Cell and Molecular Biology·Ran TianSharyn E Perry
Dec 30, 2020·International Journal of Molecular Sciences·Darren Manuela, Mingli Xu

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Datasets Mentioned

BETA
E-MEXP-3465

Methods Mentioned

BETA
transgenic
transgenics

Software Mentioned

TreeView
Cluster
MAS5

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