Lactuca sativa
Ontology highlight
ABSTRACT:
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| DRR057059.fastq.gz | Fastqsanger.gz | |||
| DRR057060.fastq.gz | Fastqsanger.gz | |||
| DRR057061.fastq.gz | Fastqsanger.gz | |||
| DRR057062.fastq.gz | Fastqsanger.gz | |||
| DRR057063.fastq.gz | Fastqsanger.gz |
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Project description:In the unicellular cyanobacterium, Synechococcus elongatus PCC 7942, most genes show rhythmic expression controlled by the Kai-based clock under continuous light conditions (LL). We found that rpoD6-null mutants impaired expression of clock-controlled genes peaking at hours 8-10 in LL, while sasA-null or rpaA-null mutants each arrested the expression profiles at subjective dawn. Time-course data (0-24 h) of wild type (WT), rpoD6-null, sasA-null and rpaA-null S. elongatus PCC 7942 strains analyzed under continuous light (LL) conditions after two 12h:12h light:dark (LD) cycles using Affymetrix high-density oligonucleotide microarrays (GeneChip CustomExpress Arrays) representing 2,515 predicted protein-coding genes on the genome of Synechococcus elongatus PCC 6301, which can be used also for the almost homologous strain, S. elongatus PCC 7942.
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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 different Lactuca sativa tissues (including leaves, flowers, and fungus-infected leaves). The high depth of the resulting datasets enabled us to examine in detail critical small RNA features such 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.
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