Ontology highlight
ABSTRACT:
PROVIDER: PRJNA765124 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR16003100.fastq.gz | Fastqsanger.gz | |||
| SRR16003101.fastq.gz | Fastqsanger.gz | |||
| SRR16003102.fastq.gz | Fastqsanger.gz | |||
| SRR16003103.fastq.gz | Fastqsanger.gz | |||
| SRR16003104.fastq.gz | Fastqsanger.gz |
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Project description:To accurately detect and quantify low abundant transcripts no represented in current EST databases we generated an RNA-seq dataset based on RNA isolated from Petunia hybrida corolla tissue harvested at 8 PM at two developmental stages, day -1 (bud) and day 2 postanthesis (the tissues containing the lowest and highest levels of phenylalanine, respectively). Total RNA samples were obtained from corollas of at least eight wild-type petunia flowers per biological replicate at the two developmental stages using an RNeasy plant mini kit from Qiagen.
2015-09-09 | E-GEOD-70948 | biostudies-arrayexpress
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Project description:Deoxyhypusine synthase (DHS) is encoded by a nuclear gene and is the key enzyme involved in the post-translational activation of the eukaryotic translation initiation factor eIF5A. DHS plays important roles in plant growth and development. To gain a better understanding of DHS, the petunia (Petunia hybrida) PhDHS gene was isolated, and the role of PhDHS in plant growth was analysed. PhDHS protein was localized to the nucleus and cytoplasm. Virus-mediated PhDHS silencing caused a sectored chlorotic leaf phenotype. The chlorophyll levels was reducted and the development of chloroplasts was abnormal in PhDHS-silenced leaves These features were not observed in DHS-suppressed Arabidopsis thaliana and Solanum lycopersicum. These results indicated that PhDHS is required for development in petunia. A proteome assay showed that 308 proteins are up-regulated and 266 proteins are down-regulated in PhDHS-silenced plants compared with control. Among them, 20 proteins in photosystem I and photosystem II and 11 thylakoid proteins were down-regulated in PhDHS-silenced leaves, further supporting the involvement of PhDHS in photosynthesis in petunia.
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Project description:Petunia is an excellent model system, especially for genetic, physiological and molecular studies. Thus far, however, genome-wide expression analysis has been rarely applied because of the lack of sequence information. We applied next-generation sequencing to generate, through de novo read assembly, a large catalogue of transcripts for Petunia axillaris and Petunia inflata. On the basis of the transcriptome of each species, comprehensive microarray chips for gene expression analysis were established and used for the analysis of global- and organ-specific gene expression in both species. In addition, microarray analysis was applied to explore the molecular basis of the seed coat defects in Petunia hybrida mutants, homozygous for a null allele of the AN11 gene, encoding a WDR transcription regulator. Among the transcripts differentially expressed in an11 seeds compared to wild type, many expected targets of AN11 were found but also several interesting new candidates that might play a role in morphogenesis of the seed coat. Our results validate the combination of next-generation sequencing with microarray analyses strategies to identify the transcriptome of two petunia species without previous knowledge of their genome, and to develop comprehensive chips as useful tools for the analysis of gene expression in P. axillaris, P. inflata and P. hybrida.
2012-02-29 | GSE28120 | GEO
Project description:Small RNAs (21-24 nt) are pivotal regulators of gene expression that guide both transcriptional and post-transcriptional silencing mechanisms in diverse eukaryotes, including most if not all plants. MicroRNAs (miRNAs) and short interfering RNAs (siRNAs) are the two major types, both of which have a demonstrated and important role in plant development, stress responses and pathogen resistance. In this work, we used a deep sequencing approach (Sequencing-By-Synthesis, or SBS) to develop sequence resources of small RNAs from Petunia x hybrida tissues (including leaves and flowers). The high depth of the resulting datasets enabled us to examine in detail critical small RNA features as size distribution, tissue-specific regulation and sequence conservation between different organs in this species. We also developed database resources and a dedicated website (http://smallrna.udel.edu/) with computational tools for allowing other users to identify new miRNAs or siRNAs involved in specific regulatory pathways, verify the degree of conservation of these sequences in other plant species and map small RNAs on genes or larger regions of the genome under study. Small RNA libraries were derived from leaves and flowers (see Series GSE13764) of Petunia x hybrida. Total RNA was isolated using the Plant RNA Purification Reagent (Invitrogen), and submitted to Illumina (Hayward, CA, http://www.illumina.com) for small RNA library construction using approaches described in (Lu et al., 2007) with minor modifications. The small RNA libraries were sequenced with the Sequencing-By-Synthesis (SBS) technology by Illumina. PERL scripts were designed to remove the adapter sequences and determine the abundance of each distinct small RNA. We thank Ana Dorantes-Acosta and Richard A. Jorgensen for providing the plant material as well as Kan Nobuta and Gayathri Mahalingam for assistance with the computational methods.
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