Gene Expression
Nebulas
Gene Expression NebulasSummary: To understand the genetic mechanisms involved in the functional transition of cotyledons from non-photosynthetic storage tissue to metabolically active photosynthetic tissue during soybean seedling development, we constructed seven different RNA-Seq libraries using cotyledons from each developmental stage separately. Analysis of RNA-Seq data from different developmental stages revealed the differential expression of many genes including transcription factors. In this study, we focused on NAC and YABBY transcription factors which showed a conspicuous expression pattern during soybean seedling development. Their expression gradually increases from stage 1 to stage 4 of soybean germinating cotyledons. The highest level of expression was found at stage 4. Then it gradually decreased as the germinating cotyledons develop a mature seedling. We investigated the differential expression of NAC and YABBY regulated genes between stage 3 (before the functional transition) and stage 6 (after the functional transition) using our RNA-Seq data. Based on our RNA-Seq data, we found that 10 genes are up-regulated and 21 genes are down-regulated by NAC transcription factor. Similarly we found that 19 genes are up-regulated and 27 genes are down-regulated by YABBY transcription factor.
Overall Design: High-throughput sequencing using Illumina HiSeq 2000 (RNA-Seq) was performed on seven developmental stages of soybean seedlings, with two biological replicates per stage.
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| Growth Protocol: | Plants were grown in optimal greenhouse conditions. Germinating cotyledons were collected at stated days after planting |
| Treatment Protocol: | Tissue was fresh frozen in liquid nitrogen for 10 min and then stored at -80°C. |
| Extract Protocol: | Total RNA was extracted from tissues using phenol:chloroform and a lithium chloride precipitation (Gonzalez and Vodkin 2007). Sequencing was performed by the Keck Center (University of Illinois) using an Illumina HiSeq 2000. |
| Library Construction Protocol: | RNA libraries were prepared for sequencing using standard Illumina protocols |
| Molecule Type: | poly(A)+ RNA |
| Library Source: | |
| Library Layout: | SINGLE |
| Library Strand: | - |
| Platform: | ILLUMINA |
| Instrument Model: | Illumina HiSeq 2000 |
| Strand-Specific: | Unspecific |
| Data Resource | GEN Sample ID | GEN Dataset ID | Project ID | BioProject ID | Sample ID | Sample Name | BioSample ID | Sample Accession | Experiment Accession | Release Date | Submission Date | Update Date | Species | Race | Ethnicity | Age | Age Unit | Gender | Source Name | Tissue | Cell Type | Cell Subtype | Cell Line | Disease | Disease State | Development Stage | Mutation | Phenotype | Case Detail | Control Detail | Growth Protocol | Treatment Protocol | Extract Protocol | Library Construction Protocol | Molecule Type | Library Layout | Strand-Specific | Library Strand | Spike-In | Strategy | Platform | Instrument Model | Cell Number | Reads Number | Gbases | AvgSpotLen1 | AvgSpotLen2 | Uniq Mapping Rate | Multiple Mapping Rate | Coverage Rate |
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