Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profiling of Arabidopsis roots of wild type, brx loss-of-function and rescued brx lines


ABSTRACT: We compared the root transcription profiles to determine the effects of loss-of-function of the BRX gene of Arabidopsis. BRX is required for optimal root growth. We compared roots of a loss-of-function line (brx) with its control background (Sav-0). Because the loss-of-function line was derived from introgression, a brx line that was complemented by a transgenic wild type copy of BRX was also included as a control. This line (rescued brx) allows the identification of expression differences that are due to introgression drag. See Mouchel et al. 2004, Genes & Dev. Vol. 18, p. 700 for a detailed description.

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Céline Mouchel 

PROVIDER: E-MEXP-635 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

BRX mediates feedback between brassinosteroid levels and auxin signalling in root growth.

Mouchel Céline F CF   Osmont Karen S KS   Hardtke Christian S CS  

Nature 20060901 7110


Brassinosteroid and auxin decisively influence plant development, and overlapping transcriptional responses to these phytohormones suggest an interaction between the two pathways. However, whether this reflects direct feedback or merely parallel inputs on common targets is unclear. Here we show that in Arabidopsis roots, this interaction is mediated by BREVIS RADIX (BRX), which is required for optimal root growth. We demonstrate that the brx phenotype results from a root-specific deficiency of b  ...[more]

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