ABSTRACT: Transcriptomic changes in the crown (stem base) of barley (Hordeum vulgare L. cv. Golden Promise) during crown-root initiation and development
Project description:Hordeum vulgare is one of the first domesticated grains in the world and it has been reported that variations in the light environment have a substantial effect on barley plant development and biological processes. High-throughput RNA-Seq study was performed to investigate the complex transcriptome network required for photomorphogenesis in barley. Seedlings were grown in dark and light conditions and three biological replicates were sampled from each condition. Six libraries from poly-A rich mRNA fraction were subjected to 51bp single-end RNA-seq sequencing.
Project description:Purpose: The goal of this study was to investigate the mechanisms involved in the initiation and development of crown-roots (CRs) in barley and to estimate the role of cytokinins (CKs) in this process. Method: stranded libraries were obtained from RNA extracted from the stem base of 1 day-after-germination (DAG) and 10DAG-seedlings of wild-type (WT) and AtCKX-overexpressing barley lines (OE-CKX). OE-CKX lines have a reduced content of endogenous CKs and are characterized by a higher number of CRs. Libraries were deep sequenced on Illumina HighSeq platform. Each sample was investigated in three independent biological replicates. Results: Using a data analysis workflow optimized for barley, we identified more than 4000 transcripts differentially expressed in the stem base of 1DAG and 10DAG-seedlings. Expression as determined by RNA-seq was validated by real-time PCR. Our data were compared to the transcriptomic profiling obtained from rice and we were able to identify genes potentially involved in the initiation/development of CRs in barley. Also the use of the transgenic line with altered endogenous CK content allowed us to conclude about the role of CKs in the process. Conclusions: Our study represents the first analysis aiming to understand the initiation and development of CRs in barley.
Project description:Time course: Interaction of Puccinia hordei with Hordeum vulgare, Ingrid (leaf) and Puccinia triticana with Hordeum vulgare, Ingrid (leaf)
Project description:NILs containing five parental lines, three wild barley genotypes ssp. spontaneum: HID 4 (A), Iraq; HID 64 (B), Turkey; and HID 369 (C), Israel, one ssp. agriocrithon: HID 382(D)) and cv. Morex (ssp. vulgare, USA). Purpose: Variant calling to identifie markers associated with a awn length QTL on the distal part of chromosome 7HL
Project description:This experiment showed the microarray expression of a barley recessive mutant (G132) and its wild type (Hordeum vulgare cv. Graphic) under high CO2 concentration. The homozygous mutation has a strong pleiotropic nature affecting many aspects of plant. In order to identify target genes of this mutation, changes in gene expression of mutant and its responses to elevated CO2 were compared to wild type.
