Oryza sativa Japonica Group
Ontology highlight
ABSTRACT:
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| DRR013387.fastq.gz | Fastqsanger.gz | |||
| DRR013388.fastq.gz | Fastqsanger.gz | |||
| DRR013389.fastq.gz | Fastqsanger.gz | |||
| DRR013390.fastq.gz | Fastqsanger.gz | |||
| DRR013391.fastq.gz | Fastqsanger.gz |
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Project description:Whole WRKY gene family transcription analysis in rice during biotic and abiotic stress.
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Project description:Purpose: The goal of this study is to compare the different genetic mechanisms between Indica and Japonica rice under cadmium stress.
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Project description:Plant growth is severely affected by toxic concentrations of the non-essential heavy metal cadmium (Cd). Comprehensive transcriptome analysis by RNA-Seq following cadmium exposure is required to further understand plant responses to Cd and facilitate future systems-based analyses of the underlying regulatory networks. In this study, rice plants were hydroponically treated with 50 µM Cd for 24 hours. In total, ~60,000 transcripts, including transcripts that could not be characterized by microarray-based approaches, were evaluated and ~36,000 transcripts were responsive to Cd exposure. Among multigenic families that may protect cells from generated ROS and reduce Cd toxicity, prominently upregulated antioxidant enzyme genes were identified. Furthermore, 168 different metal ion transporter genes, which might mediate the transport of transition Cd, responded to Cd exposure. qRT-PCR analysis of randomly selected genes indicated that their expression changed obviously after exposure to various heavy metal stresses. The Cd responsive genes included many abiotic stress (drought, high-salinity, low temperature) responsive genes. Based on further investigation into the expression patterns of abiotic stress regulatory genes such as DREB, part of the signal transduction pathway for Cd exposure was determined to cross-talk with abiotic stress signaling pathways. Our results provide useful information for further studies of the molecular mechanisms of plant adaptation to Cd exposure and the improvement of Cd tolerance in crop species.
2014-08-07 | E-MTAB-4306 | biostudies-arrayexpress
Project description:Seeds experience several stress responses from dry to germinated state. To determine the regulators contributing to imbibitional tolerance, dynamic transcriptome analyses were conducted at dry (0 h), imbibed (24 h) and germinated (48 h) stages in japonica Jiucaiqing in this study. Results showed that the differentially expressed genes (DEGs) were pronounced in the early stage (0-24 h) than the late stage (24-48 h); 1,452 transcripts were differentially expressed (648 up-regulated and 804 down-regulated) in the early stage and 625 transcripts (230 up-regulated and 395 down-regulated) in the late stage. Gene ontology and MapMan analyses confirmed that 391 and 164 DEGs at the early and late stage respectively involved in stress responses pathway. These DEGs included the abiotic stress-, hormone-, peroxidases-, signaling-, transcription-, proteolysis- and cell wall-related genes. Nearly all the heat stress-related DEGs, e.g. hsp20 and DnaK family proteins, were down-regulated with seed germination, while the peroxidases- and signaling-related DEGs, e.g. calcium-binding proteins, were up-regulated. Many auxins-, abscisic acid- and ethylene-related DEGs, e.g. 9-cis-epoxycarotenoid dioxygenase, OsFBL16 and OsSAUR33, were involved in stress responses during seed germination. Meanwhile, several transcription factors of bZIP and MYB, ethylene responsive element binding protein family (ERF), and heat stress transcription factor family (HSF) were identified during seed germination. The proteolysis-related DEGs, e.g. ubiquitin-related proteins, were significantly regulated during seed germination. The uniformity between transcriptome data, quantitative trait loci co-localizations and quantitative RT-PCR results confirm the crucial roles of the cell wall-related genes on seed germination. The identified stress-responsive might be useful for the improvement of imbibitional tolerance in rice.
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Project description:Characterizing the role of rice NRAMP5 in Manganese, Iron and Cadmium Transport
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Project description:Phosphate starvation/sufficient rice seedling, root or shoot Pi-starvation or Pi-sufficient stresses responsible rice genes, including previously unannotated genes were identified by Illumina mRNA-seq technology. 53 million reads from Pi-starvation or Pi-sufficient root or shoot tissues were uniquely mapped to the rice genome, and these included 40574 RAP3 transcripts in root and 39748 RAP3 transcripts in shoot. We compared our mRNA-seq expression data with that from Rice 44K oligomicroarray, and about 95.5% (root) and 95.4% (shoot) transcripts supported by the array were confirmed expression both by the array and by mRNA-seq, Moreover, 11888 (root) and 11098 (shoot) RAP genes which were not supported by array, were evidenced expression with mRNA-seq. Furthermore, we discovered 8590 (root) and 8193 (shoot) previously unannotated transcripts upon Pi-starvation and/or Pi-sufficient.
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