Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcriptional profiling during OSH1 induction

ABSTRACT: In flowering plants, knotted1-like homeobox (KNOX) transcription factors play crucial roles in establishment and maintenance of the shoot apical meristem (SAM), from which aerial organs such as leaves, stems and flowers initiate. We report that a rice (Oryza Sativa) KNOX gene Oryza sativa homeobox1 (OSH1) represses the brassinosteroid (BR) phytohormone pathway through activation of BR catabolism genes. Inducible overexpression of OSH1 caused brassinosteroid insensitivity, whereas loss-of-function showed a BR-overproduction phenotype. Genome-wide identification of loci bound and regulated by OSH1 revealed hormonal and transcriptional regulation as the major function of OSH1. Among these targets, BR catabolism genes CYP734A2, CYP734A4 and CYP734A6 were rapidly up-regulated by OSH1-induction. Furthermore, RNAi knockdown plants of CYP734A genes arrested growth of the SAM and mimicked some osh1 phenotypes. Thus, we suggest that local control of BR levels by KNOX genes is a key regulatory step in SAM function.

INSTRUMENT(S): Illumina HiSeq 2000

ORGANISM(S): Oryza sativa Japonica Group

SUBMITTER: Sarah Hake

PROVIDER: E-MTAB-4316 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Genome-wide study of KNOX regulatory network reveals brassinosteroid catabolic genes important for shoot meristem function in rice.

Tsuda Katsutoshi K Kurata Nori N Ohyanagi Hajime H Hake Sarah S

The Plant cell 20140905 9

In flowering plants, knotted1-like homeobox (KNOX) transcription factors play crucial roles in establishment and maintenance of the shoot apical meristem (SAM), from which aerial organs such as leaves, stems, and flowers initiate. We report that a rice (Oryza sativa) KNOX gene Oryza sativa homeobox1 (OSH1) represses the brassinosteroid (BR) phytohormone pathway through activation of BR catabolism genes. Inducible overexpression of OSH1 caused BR insensitivity, whereas loss of function showed a B ...[more]

PMID: 25194027

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Project description:The DMDD Programme (Deciphering the Mechanisms of Developmental Disorders, https://dmdd.org.uk/) provides a free online database of morphological and molecular phenotypes from embryonic-lethal mouse gene knockouts (http://www.dmdd.org.uk/). Embryos are imaged using HREM, placentas are examined by histology and mutant embryo mRNA expression profiles are compared to wild type. To underpin these investigations we have produced a comprehensive time series of gene expression through normal embryo development. Total RNA was extracted from somite number staged, second generation genotypically wild type, C57BL/6N embryos of mixed G0 linages from the Mouse Genetics Programme (http://www.sanger.ac.uk/science/collaboration/mouse-resource-portal) and DNase treated. Stranded RNA-seq libraries were constructed using the Illumina TruSeq Stranded RNA protocol with oligo dT pulldown. Notes about samples and libraries: (1) A combination of litter identifier and embryo identifier within a litter will unambiguously identify a single embryo used in this study. (2) There is a margin of error for the somite-stage information (+/- 1 somite) because some embryos could be in between somite stages. (3) All knockouts in the parents or grandparents are for embryonic lethal genes. (4) There are four biological replicates per somite-stage, with the exception of the 4-somite embryos (three biological replicates only). Altogether 111 embryos were sourced, of which 14 were sequenced twice to generate enough read depth/coverage. No new libraries were prepared for the repeated sequencing, despite the assays being assigned new ERX* accessions. (5) Sex of the embryos was determined post-RNA-seq by looking at the expression of Xist (strong expression in females only). (6) Library constructon batch refers to batch of sample handling post RNA-extraction (size selection, PCR amplification during library preparataion). (7) Superbatch gathers 17 representative embryos out of the 111 embryos post RNA-extraction, and put them through the library construction pipeline as one single batch. The generated data is intended to be used for normalisation using the remove unwanted variation (RUV) method. This data is part of a pre-publication release. For information on the proper use of pre-publication data shared by the Wellcome Trust Sanger Institute (including details of any publication moratoria), please see http://www.sanger.ac.uk/datasharing/ .

Dataset Information

Transcriptional profiling during OSH1 induction

Publications

Genome-wide study of KNOX regulatory network reveals brassinosteroid catabolic genes important for shoot meristem function in rice.

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