Transcriptional repression caused by Dof5.8 is involved in proper vein network formation in Arabidopsis thaliana leaves

Journal of Plant Research
Mineko Konishi, Shuichi Yanagisawa

Abstract

Vascular plants have a network of vasculature in their leaves, which supplies water and nutrients and exports photoassimilates to other tissues. The vascular network is patterned during the development of leaf primordia through the induction of provascular differentiation by auxin. Arabidopsis thaliana Dof5.8, encoding a Dof-type transcription factor, is expressed early in provascular cells under the control of the MONOPTEROS transcription factor, also known as auxin response factor 5 (ARF5). Here, we report the effect of overexpressing Dof5.8 in provascular cells on the formation of the vascular network. Overexpression of Dof5.8 inhibited the formation of higher-order veins in cotyledons and leaves, probably through transcriptional repression by Dof5.8. The expression of auxin-associated transcription factor genes, DORNRöSCHEN and SHI-RELATED SEQUENCE 5, was downregulated in the Dof5.8 overexpressors, and overexpression of these genes partially rescued the impaired formation of higher-order veins in Dof5.8-overexpressing lines, suggesting that the overexpression of Dof5.8 modulates the auxin response and leads to impaired vein formation in A. thaliana.

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May 10, 2008·The Plant Journal : for Cell and Molecular Biology·Mineko Konishi, Shuichi Yanagisawa
Jul 31, 2008·The Plant Journal : for Cell and Molecular Biology·Aleksandra SkiryczBernd Mueller-Roeber
Oct 31, 2009·The Plant Journal : for Cell and Molecular Biology·Stefano GabrielePaola Vittorioso
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Dec 14, 2011·Journal of Experimental Botany·Paloma Rueda-RomeroLuis Oñate-Sánchez

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Citations

Feb 26, 2016·Annual Review of Plant Biology·Dolf Weijers, Doris Wagner
Jun 3, 2020·International Journal of Molecular Sciences·Gea GuerrieroJean-Francois Hausman
Oct 6, 2017·Journal of Experimental Botany·Francisco Javier Molina-HidalgoEnriqueta Moyano
Jul 12, 2018·Plant Cell Reports·Magdalena Biedroń, Alicja Banasiak

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