Expression data from rice seeds during low temperature treatment
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ABSTRACT: As a species mostly planted in tropical and subtropical regions, rice is sensitive to chilling temperature, especially at reproductive stage. However, the effect of low temperature on seed development has not been well characterized. The transcriptome of two rice cultivars Zhonghua11 and Hanfeng were analyzed to characterize the gene regulatory networks of rice seed during low temperature treatment. Whole plants of two rice cultivars Zhonghua11 (low temperature sensitive) and Hanfeng (low temperature tolerance) were treated at 14°C for 2 days during seed development stage. The plants without treatment serve as controls. Rice seeds were harvested for RNA extraction.
Project description:As a species mostly planted in tropical and subtropical regions, rice is sensitive to chilling temperature, especially at reproductive stage. However, the effect of low temperature on seed development has not been well characterized. The transcriptome of two rice cultivars Zhonghua11 and Hanfeng were analyzed to characterize the gene regulatory networks of rice seed during low temperature treatment.
Project description:Environmental stresses influence the growth of plants and the productivity of crops. Salinity is one of the most important abiotic stresses for agricultural crops. PCD is induced by various biotic and abiotic stresses in algae and higher plants, including high salinity treatment. OsPDCD5, an ortholog to mammalian-programmed cell death 5, is up-regulated under low temperature and NaCl treatments. We found that the transgenic rice which constitutively expressed anti-OsPDCD5 increased salt stress tolerance in unique ways. By using the Rice Genome Microarray, we identi?ed target genes that were regulated in transgenic rice plants by anti-OsPDCD5. Leaf tissues of 2-week-old transgenic and nontransgenic seedlings (10 plants each) before 200mM NaCl treatment, 20mins and 3 hours after 200mM NaCl treatment, respectively, were selected.
Project description:Transcriptional profiling of wheat embryos of developing seed comparing seeds grown at low temperature:13˚C with seeds grown at high temperature:25˚C during seed development using wheat 2 cultivars: Norin61 (N61) and Shiroganekomugi (SK). Goal was to determine the effects of temperature on global gene expression.
Project description:The aim of this study is to profile the short-term transcriptional response of rice to chilling at different timings, and to identify genes that are putatively responsible for stress-tolerance. Thaibonnet and Volano were selected as susceptible and resistant rice cultivars, respectively. According to bibliography and to our quantitative PCR experiment results, we inferred that 2 and 10 hours after the beginning of stress are the time-points in which short-term early and late transcriptional response to chilling is more evident. RNA from Thaibonnet and Volano plants after 0 (not stressed), 2 and 10 hours at 10C were extracted and sequenced. Differential short-term responses to low temperatures at two different timings (to which we refer as early and late) between those two cultivars were analysed by RNA-seq. Our study may contribute to elucidate the molecular mechanisms involved in rice response to chilling and to identify novel genes putatively involved in low temperature tolerance.
Project description:Expression profiles of protein coding genes were characterized using Affymetrix rice genome array to compare with expression profiles of miRNAs. Experiment Overall Design: Five tissues (embryo, endosperm, leaf and root of 7-day-old seedlings, 10-day-old seedling) were analyzed, each has two biological repeats.
Project description:Xanthomonas oryzae pv. oryzae (Xoo), the causative agent of bacterial blight disease, is one of the major threats to rice productivity. Yet, the molecular mechanism of rice-Xoo interaction is elusive. Here, we report comparative proteome profiles of Xoo susceptible (Dongjin) and resistant (Hwayeong) cultivars of rice in response to two-time points (3 and 6 days) of Xoo infection. Low-abundance proteins were enriched using a protamine sulfate (PS) precipitation method and isolated proteins were quantified by a label-free quantitative analysis, leading to the identification of 3846 protein groups. Of these, 1128 proteins were significantly changed between mock and Xoo infected plants of Dongjin and Hwayeong cultivars. Based on the abundance pattern and functions of the identified proteins, a total of 23 candidate proteins were shortlisted that potentially participate in plant defense against Xoo in the resistant cultivar. Of these candidate proteins, a mitochondrial arginase-1 showed Hwayeong specific abundance and was significantly accumulated following Xoo inoculation. Overexpression of arginase-1 in susceptible rice cultivar (Dongjin) resulted in enhanced tolerance against Xoo as compared to the wild-type (WT). In addition, expression analysis of defense-related genes encoding PR1, glucanase I, and chitinase II by qRT-PCR showed their enhanced expression in the overexpression lines as compared to WT. Mitochondrial localization of the selected arginase was further confirmed by fluorescent microscopy using GFP-tagged arginase. Taken together, our results uncover the proteome changes in the rice cultivars and highlight the functions of arginase in plant defense against Xoo.
Project description:The booting stage of rice shows the most sensitivity to cold stress, and low-temperature stress causes irreversible pollen sterility. We performed transcriptome analysis using RNA-seq to investigate the response of rice anthers to low-temperature stress. In this RNA-seq analysis, to validate the results of transcriptome analysis of anthers from 13 rice lines using microarrays, four cultivars were selected for analysis from the 13 tested for microarrays.
Project description:The receptor-like kinases (RLKs) plays critical roles in signal transduction through sensing the extracellular signals and activating the downstream signal transduction by phosphorylating their targets. Up to now, there are only a few RLKs have been functionally identified. In this study, we systemically analyzed the expression pattern of rice genes, especially the RLK coding genes during embryo and endosperm development. Rice Ovary and three development stages of embryo and endosperm (embryo 3, 9, 12 DAF; Endosperm 3, 9, 16 DAF) were analyzed, all of them were biologically repeated two times.
Project description:Transcriptional profiling of wheat embryos of developing seed comparing seeds grown at low temperature:13˚C with seeds grown at high temperature:25˚C during seed development using wheat 2 cultivars: Norin61 (N61) and Shiroganekomugi (SK). Goal was to determine the effects of temperature on global gene expression. Two-condition experiment, Low(13˚C) vs. high (25˚C) temperatures during seed development. Time course experiments along with days after anthesis (DAA).
Project description:In this study, we analyzed function of the rice RDR701 and various DCLs proteins in small RNA processing. small RNA deep sequencing analyses revealed that RDR701 and OsDCL4 is involved in tasiRNAs and 21- and 24-nt phasiRNAs biogenesis. Further analyses indicate RDR701 coupling with OsDCL4 and OsDCL3b are required for the biogenesis of 21- and 24-nt phasiRNAs, respectively. The triggering miRNAs for intial both size phasiRNAs,are also shown RDR701- and OsDCL4-dependent, suggesting two sequential round activity of RDR701 in associated with different DCLs are essential for rice phasiRNAs biogenesis. Four small RNA libraries were constructed from panicles of zhonghua11 (a wild-type Japonica rice variety) and rdr701-1 at high temperature (Day average temperature 32M-bM-^DM-^C) and low temperature (Day average temperature 28M-bM-^DM-^C).