Transcriptomic Analysis of Responses to Imbalanced Carbon:Nitrogen Availabilities in Rice Seedlings
Ontology highlight
ABSTRACT:
ORGANISM(S): Oryza sativa Japonica Group
SUBMITTER: Aobo Huang
PROVIDER: E-MTAB-5118 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:Fairy rings are zones of stimulated grass growth by the interaction between the fungi and the plant. In the previous research, we reported the identification of the M-bM-^@M-^\fairyM-bM-^@M-^], 2-azahypoxanthine (AHX), produced by the fairy ring-forming fungus and the mechanism of its growth-promoting activity using DNA microarray. We discovered AOH, a common metabolite of AHX in plants. We investigate expression profiling of rice seedlings treated with AHX or AOH for the mechanism of their growth-promoting activity. Three-condition experiment, control vs. AHX-treated rice (50 and 200 mM) and AOH-treated rice (50 and 200 mM).
2014-01-01 | E-GEOD-38844 | biostudies-arrayexpress
Project description:Potential components of the barrier to radial oxygen loss (ROL) are suberin and/or lignin, which accumulate at the cell wall in the cells of peripheral cell layers of the root. Chemical composition of the apoplastic barrier in rice roots was characterized and it was suggested that ROL can be restricted by the formation of a suberized exodermis and/or lignified sclerenchyma in the outer part of the root. To characterize reorganization of primary carbon metabolism in rice roots during the ROL barrier formation, we obtained the profiles of polar metabolites and the profiles of fatty acids of different zones of rice roots from plants growing in stagnant (anaerobic) and in well aerated medium. Biochemical data are combined with the results of microarray analysis. Nine days after germination, the seedlings were transferred to well aerated nutrient solution or stagnant deoxygenated nutrient solution. Stagnant solution contained 0.1% (w/v) dissolved agar and was deoxygenated (dissolved oxygen, <0.5 mg lM-bM-^@M-^S1) prior to use by flushing with N2 gas. After 14 d (23 d old), adventitious roots, 100-150 mm long, were harvested from rice plants grown either in aerated or stagnant conditions and RNA was extracted from 10 mm segments from the regions 0-10 mm, 10-20 mm and 20-30 mm from the root apex have been cut with sterile razor blade and collected and processed separately. Total RNAs were labeled with a Quick Amp Labeling Kit (Agilent Technologies) according to the manufacturerM-bM-^@M-^Ys instructions. Aliquots of Cy5-labeled and Cy3-labeled cRNA (825 ng each) were used for hybridization in a rice 44K oligo-DNA microarray.
2014-02-18 | E-GEOD-52128 | biostudies-arrayexpress
Project description:Potassium is one of the essential macronutrients required for plant growth and development. It plays a major role in different physiological processes like cell elongation, stomatal movement, turgor regulation, osmotic adjustment, and signal transduction by acting as a major osmolyte and component of the ionic environment in the cytosol and subcellular organelles. We used whole genome microarrays to determine the transcriptomic profile of rice seedlings exposed to short-term K+ deficiency followed by K+ resupply. Potassium treated seedlings were used for RNA extraction and hybridization on Affymetrix rice Genechip by microarrays. Three biological replicates of each sample were used for microarray analysis. We wanted to know the altered expression patterns of potassium-responsive genes majorly involved in metabolic processes, stress responses, signaling pathways, transcriptional regulation, and transport of multiple molecules including K+. Seeds of indica rice were surface sterilized and grown hydroponically in rice growing medium. Plants were grown in the rice growth room under the condition of 16 h light/8 h dark (28°C) photoperiod with 70 % humidity. After 5 days of normal growth, one half of the rice seedlings were transferred to nutrient media with normal concentration of potassium (KP, 0.409 mM K2SO4) and other one half to medium without potassium (KM, 0 mM). After 5 days, potassium (0.409 mM K2SO4) was resupplied to the plants grown in KM medium for 6 h.
2013-09-14 | E-GEOD-44250 | biostudies-arrayexpress
Project description:Transcriptional programs are important for the development of complex eukaryotic organisms. Suites of genes expressed with temporal and spatial controls by regulatory networks in response to environmental cues are the cornerstone for achieving the specification of morphology and physiology of the tissue or organ systems. Thus, an important issue of developmental biology is to define the subsets of expressed genes and their expression patterns that are related to the organ or tissue system. Rice is a model plant for cereal genome research. Although large amounts of data of whole genome expression have been generated in recent years in rice, the majority of the studies were designed to identify differentially expressed genes between controls and treatments with certain experimental conditions such as biotic, abiotic or light, or to investigate the comparative expression patterns between wild type and mutants of certain genes. Only in a few cases were the datasets designed for studying the transcriptomes of a limited number of organs and cell types. Thus, there is still insufficiency in the available datasets that would allow for the establishment of expression patterns for suits of genes during the developmental processes of rice. In this study, we collected 39 tissues/organs covering the life cycle of the rice from two indica varieties Minghui 63 and Zhenshan 97, and the Affymetrix GeneChip Rice Genome Array was used to investigate the transcriptomes of these organs. The objective was to develop a genomic resource of genome-wide dynamic transcriptome of the rice plant, which could be used as the reference gene expression map for rice and other cereals. Also, the dataset is used to identify the candidates of genes with potential functions in regulating the development of rice or breeding practice. Keywords: rice, expression profiling, life cycle, development, inflorescence To dissect the developmental transcriptomes of rice, a total of 39 tissues covering the entire tissue culture process and life cycle were sampled from two indica varieties Minghui 63 and Zhenshan 97. And the Affymetrix Genechip rice Genome Array was used to investigate their dynamic transcriptomes. Two independent biological replicates were sampled from most tissues, except two seedling and three panicle tissues, for which three independent biological replicates each with two technical replicates were sampled, resulting in a dataset of 190 microarrays.
2010-01-20 | E-GEOD-19024 | biostudies-arrayexpress
Project description:Nitrogen is the most important macronutrient in plants and its supply induces responses in gene expression, metabolism and developmental processes. However, the molecular mechanisms underlying the nitrogen responses remain poorly understood. Here we show that the supply of nitrate but not ammonium immediately induces the expression of a transcriptional repressor gene in rice, designated NIGT1 (Nitrate-Inducible, GARP-type Transcriptional Repressor 1). The results of DNA-binding site selection experiments and electrophoretic mobility shift assays indicated that NIGT1 binds to DNA containing either of two consensus sequences, GAATC and GAATATTC. In transient reporter assays, NIGT1 was found to repress transcription from the promoters containing the identified NIGT1-binding sequences in vivo. Furthermore, NIGT1 repressed the activity of its own promoter, suggesting an auto-repression mechanism. Consistently, nitrate-induced NIGT1 expression was found to be downregulated after a transient peak during nitrate treatment, and the nitrate-induced expression of NIGT1 decreased in transgenic rice plants in which this gene was constitutively overexpressed. Furthermore, the chlorophyll content that could be a marker of nitrogen utilization was found to be decreased in NIGT1 overexpressors of rice grown with nitrate medium but not with ammonium medium. Thus, we propose NIGT1 as a nitrate-inducible and auto-repressible transcriptional repressor that may play a role in the nitrogen response in rice. Taken together with the fact that the NIGT1-binding sites are conserved in promoter sequences of Arabidopsis NIGT1 homologs, our findings imply the presence of a time-dependent complex system for nitrate-responsive transcriptional regulation that is conserved in both monocots and dicots. Nitrate-induced gene expression in rice shoots was monitored 2 hours after the treatment with 10 mM potassium nitrate in the NIGT1-overexpressing lines and vector control lines.
2013-01-03 | E-GEOD-43243 | biostudies-arrayexpress
Project description:We used GeneChip Rice Genome Array (Affymetrix, Santa Clara, CA, USA) to identify genes that were rapidly induced by glutamine in rice roots. Transcriptomic analysis of rice roots revealed that the expression of at least 35 genes involved in metabolism, transport, signal transduction, and stress responses was rapidly induced by glutamine within 30 minutes. Total RNA from –N and Gln-treated roots (2.5 mM Gln, 30 min) was extracted using a phenol extraction protocol. RNA samples from two biological repeats were sent to the Affymetrix Gene Expression Service Lab at Academia Sinica, Taipei, Taiwan (http://ipmb.sinica.edu.tw/affy/) for target preparation, and hybridization to the GeneChip Rice Genome Array.
2015-06-30 | E-GEOD-56770 | biostudies-arrayexpress
Project description:By comparing transcriptional profiling between a wild-type rice and an Al-sensitive rice mutant star1, we found that rice possesses novel mechanisms of Al-tolerance in addition to ART1-regulated mechanism in rice. The transcriptional profiling between the wild-type rice and an Al-sensitive mutant, star1. +Al vs. -Al in the roots of wild-type rice and star1 mutant. Biological replicates: +Al/-Al WT root tip 4 replicates, +Al/-Al WT basal tip 4 replicates, +Al/-Al star1 root tip 4 replicates, +Al/-Al star1 basal tip 4 replicates
2012-09-19 | E-GEOD-40964 | biostudies-arrayexpress
Project description:Rare sugars are monosaccharides that are rarely present in nature. One of the rare sugars, D-psicose, had a negative effect on shoot growth of rice. This negative effect to rice growth was observed previously with D-allose, but not observed in other tested rare sugars. To clarify the response to D-psicose in rice at the gene expression level, we performed a microarray analysis using the Agilent Rice Oligo Microarray (44k, custom-made; Agilent Technologies, Redwood City, CA, USA). As a result, treatment of D-psicose caused high induction of many defense-related genes including pathogenesis-related (PR) genes in rice. An Agilent Rice Oligo Microarray (44k, custom-made; Agilent Technologies, Redwood City, CA, USA) was used for the microarray analysis. By using the RNeasy plant mini kit (Qiagen, Hilden, Germany), total RNA was extracted from shoots of two-leaf stage rice plants that had been treated with 0.5 mM D-psicose or no sugar for 2 days. For each biological replicate, material from at least five rice plants was pooled to provide a single sample for RNA extraction. We performed 3 biological replicates for each treatment. All microarray procedures and data analyses were performed according to the manufacturer’s instructions. RNA integrity was checked using an Agilent 2100 Bioanalyzer (Agilent Technologies, Redwood City, CA, USA). Total RNA (400 ng) was labeled with Cy3 or Cy5 using an Agilent Low RNA Input Fluorescent Linear Amplification Kit (Agilent Technologies). Fluorescently labeled targets were hybridized to Agilent Rice Oligo Microarrays for 17 h at 65°C. After hybridization, wash processes were performed according to the manufacturer’s instructions, and hybridized microarrays were scanned using an Agilent Microarray Scanner (G2505B and software G2565BA; Agilent Technologies). Feature extraction software (version 9.1; Agilent Technologies) was used to delineate and measure the signal intensity of each spot in the array, and to normalize intensities. The background was measured around each spot as local background, calculated by the Feature Extraction software. Statistical data extraction processes were performed according to the manufacturer’s instructions.
2010-01-30 | E-GEOD-19595 | biostudies-arrayexpress
Project description:Nucleus as the important subcellular organ of plant cell is responsible for storing most genetic information and controlling the plant's activities. Seed germination is an important stage for plant growth. To understand the role of nuclear protein and its phosphorylation during rice seed germination, gel free/label free proteomic technique was used
2016-03-17 | PXD001774 | Pride
Project description:Rice plants (Oryza sativa L. cv. Nipponbare) were grown in plastic pots filled with nutrient soil for 2 weeks under flooded lowland conditions with a 12-h light (28C)/12-h dark (25C) regimen (ca. 1500 umol photons mM-^V2 sM-^V1). The plants were cold treated by transfer from 28C to 10C with growth for 2 days.
2014-03-03 | E-MEXP-3863 | biostudies-arrayexpress