E-GEOD-122866
Ontology highlight
ABSTRACT:
PROVIDER: E-GEOD-122866 | ExpressionAtlas | 2020-04-06
REPOSITORIES: ExpressionAtlas
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| E-GEOD-122866-analysis-methods.tsv | Tabular | |||
| E-GEOD-122866-analytics.tsv | Tabular | |||
| E-GEOD-122866-atlasExperimentSummary.Rdata | Rdata | |||
| E-GEOD-122866-configuration.xml | Xml | |||
| E-GEOD-122866-g1_g2-mvaPlot.png | Other |
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Project description:Eighteen samples (three replicates) of the maize hybrid An’nong 591 and its parental lines under control and heat treatment were used for RNA sequencing
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Project description:Transcriptome analysis of maize hybrid An’nong 591 and its parental lines under heat stress
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Project description:Xylose-utilizing yeasts with tolerances to fermentation inhibitors (such as weak organic acids) and high temperature are needed for cost-effective simultaneous saccharification and co-fermentation (SSCF) of lignocellulosic materials. We constructed a novel xylose-assimilating Saccharomyces cerevisiae strain with improved fermentation performance under heat and acid co-stress using the genome shuffling technique. Two xylose-utilizing diploid yeasts with different genetic backgrounds were used as the parental strains for genome shuffling. The hybrid strain Hyb-8 showed significantly higher xylose fermentation ability than both parental strains (Sun049T-Z and Sun224T-K) under co-stress conditions of heat and acids. To screen for genes that might be important for fermentation under heat and acid co-stress, a transcriptomic analysis of hybrid strain Hyb-8 and its parental strains was performed.
2017-07-25 | GSE101786 | GEO
Project description:High temperature is increasingly becoming one of the prominent environmental factors affecting the growth and development of maize (Zea mays L.). Therefore, it is critical to identify key genes and pathways related to heat stress (HS) tolerance in maize. Here, we identified a heat-resistant (Z58D) and heat-sensitive (AF171) maize inbred lines at seedling stage. Transcriptomic analysis identified 3,006 differentially expressed genes (DEGs) in AF171 and 4,273 DEGs in Z58D under HS treatments, respectively. Subsequently, GO enrichment analysis showed that shared upregulated genes in AF171 and Z58D involved in response to HS, protein folding, abiotic and temperature stimulus pathway. Moreover, the comparison between the two inbred lines under HS showed that response to heat and response to temperature stimulus significantly overrepresented for the 1,234 upregulated genes. Furthermore, commonly upregulated genes in Z58D and AF171 had higher expression level in Z58D than AF171. In addition, maize inbred CIMBL55 had been verified to be more tolerant than B73 and commonly upregulated genes had higher expression level in CIMBL55 than B73 under HS. The consistent results indicated that heat-resistant inbred lines may coordinate the remarkable expression of genes in order to recover from HS. Additionally, 35 DEGs were conserved among 5 inbred lines by a comparative transcriptomic analysis. Most of them were more pronounced in Z58D than AF171 at expression level. Those candidate genes may confer thermotolerance in maize.
2024-03-01 | GSE254852 | GEO
Project description:BACKGROUND: Climate change will lead in the future to an occurrence of heat waves with a higher frequency and duration than observed today, which has the potential to cause severe damage to seedlings of temperate maize genotypes. In this study, we aimed to (I) assess phenotypic variation for heat tolerance of temperate European Flint and Dent maize inbred lines, (II) investigate the transcriptomic response of temperate maize to linearly increasing heat levels and, (III) identify genes associated with heat tolerance in a set of genotypes with contrasting heat tolerance behaviour. RESULTS: Strong phenotypic differences with respect to heat tolerance were observed between the examined maize inbred lines on a multi-trait level. We identified 607 heat responsive genes as well as 39 heat tolerance genes. CONCLUSION: Our findings indicate that individual inbred lines developed different genetic mechanisms in response to heat stress. We applied a novel statistical approach enabling the integration of multiple genotypes and stress levels in the analysis of abiotic stress expression studies.
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Project description:Here, in order to study maize drought stress responses at the molecular level, we have employed omics strategy to perform transcriptome and proteome profiling of drought contrasting maize lines at the various stages. We conducted a comparative analysis of different maize varieties at various stages after drought treatment. In addition, we evaluated some physiological responses of these maize lines under drought stress, and the results of this study provide further insights into the drought stress tolerance signatures in maize.
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Project description:Purpose: The goal of this analysis is that to reveal the different expression pattern in chilling-tolerant and chilling susceptible lines under chilling stress.Chilling is a major stress to plants of subtropical and tropical origins including maize. To reveal molecular mechanisms underlying chilling tolerance and chilling survival, we investigated maize transcriptome responses to chilling stress in differentiated leaves and roots as well as in crowns with meristem activity for survival. Chilling stress on maize shoots and roots is found to each contribute to seedling lethality in maize. Comparison of maize lines with different chilling tolerance capacity reveals that chilling survival in maize is highly associated with upregulation in leaves and crowns of abscisic acid response pathway, transcriptional regulators and metal ion transporters as well as downregulation of heat response in crowns. Comparison of chilling treatment on whole and part of the plants reveals that response to distal-chilling is very distinct from, and sometimes opposite to, response to local- or whole-plant chilling in both leaves and roots, suggesting a communication between shoots and roots in environmental perception. In sum, this study details chilling responses in leaves, roots and crowns and reveals potential chilling survival mechanism in maize, which lays ground for further understanding survival and tolerance mechanisms under low but non-freezing temperatures in tropical and subtropical plants.
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Project description:Heterosis is most frequently manifested as the superior performance of a hybrid than either parent, especially under stress conditions. Nitric oxide (NO) is a well-known gaseous signaling molecule that acts as a functional component during plant growth, development, and defense responses. In this study, the Brassica napus L. hybrid (F1, NJ4375 × MB1942) showed significant heterosis under salt stress, during both the germination and post-germination periods. These were in parallel with the changes in redox and ion homeostasis. The stimulation of endogenous NO was more pronounced in hybrid plants, compared to parental lines, which might be mediated by nitrate reductase. Proteomic and biochemical analysis further revealed that protein abundance related to several metabolic processes, including the chlorophyll biosynthesis, the proline metabolism, and the tricarboxylic acid cycle metabolism pathway, were greatly suppressed by salt stress in the two parental lines, respect to those in hybrid. Above responses in hybrid plants were intensified by a NO-releasing compound, but abolished by a NO scavenger, both of which were matched with the changes in chlorophyll and proline contents. Taken together, we proposed that heterosis derived from F1 hybridization in salt stress tolerance might be mediated by NO-dependent activation of defense responses and metabolic processes.
2021-03-30 | PXD023601 | Pride
Project description:Heat stress is a major limiting factor for grain yield and grain quality in wheat production. In crops, abiotic stresses have transgenerational effects and the mechanistic basis of stress memory is associated with epigenetic regulation. The current study presents the first systematic analysis of the transgenerational effects of post-anthesis heat stress in tetraploid wheat. Genotype-dependent response patterns to parental and progeny heat stress were found for the leaf physiological traits, harvest components, and grain quality traits measured. Parental heat stress had positive influence on the offspring under re-occurring stress for traits like chlorophyll content, grain weight, grain number and grain total starch content. Integrated sequencing analysis of the small RNAome, mRNA transcriptome, and mRNA degradome provided the first description of the molecular networks mediating heat stress adaption under transgenerational influence. The expression profile of 1771 microRNAs (733 being novel) and 66,559 genes was provided, with differentially expressed microRNAs and genes identified subject to the progeny treatment, parental treatment and tissue type factors. Gene Ontology and KEGG pathway annotation of stress responsive microRNAs-mRNA modules provided further information on their functional roles in biological processes like hormone homeostasis, signal transduction, and protein stabilization. Our results provide new sights on the molecular basis of transgenerational heat stress adaptation, which can be used for improving thermos-tolerance in breeding.
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Project description:Expression profiling analyses for 5 maize inbreds and 4 hybrids, chosen to represent diversity in genotypes and heterosis responses, revealed a correlation between genetic diversity and transcriptional variation. The majority of differentially expressed genes in each of the different hybrids exhibited additive expression patterns, and ~25% exhibited statistically significant non-additive expression profiles. Among the non-additive profiles, ~80% exhibited hybrid expression levels between the parental levels, ~20% exhibited hybrid expression levels at the parental levels and ~1% exhibited hybrid levels outside the parental range. These findings indicate that the frequencies of additive and non-additive expression patterns are very similar across a range of hybrid lines. Keywords: Genotype comparison series
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