Ontology highlight
ABSTRACT:
PROVIDER: PRJNA665784 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR12717514_1.fastq.gz | Fastqsanger.gz | |||
| SRR12717514_2.fastq.gz | Fastqsanger.gz | |||
| SRR12717515_1.fastq.gz | Fastqsanger.gz | |||
| SRR12717515_2.fastq.gz | Fastqsanger.gz | |||
| SRR12717516_1.fastq.gz | Fastqsanger.gz |
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Project description:Plants are exposed to regular diurnal rhythms of light and dark. Changes in the photoperiod by the prolongation of the light period cause photoperiod stress in short day-adapted Arabidopsis thaliana. Here we report on the transcriptional response to photoperiod stress of wild-type A. thaliana and photoperiod stress-sensitive cytokinin signaling and clock mutants. Transcriptomic changes induced by photoperiod stress included numerous changes in reactive oxygen species (ROS)-related transcripts and showed a strong overlap with alterations occurring in response to ozone stress and pathogen attack, which have in common the induction of an apoplastic oxidative burst. A core set of photoperiod stress-responsive genes has been identified, including salicylic acid (SA)-biosynthesis and -signaling genes. Genetic analysis revealed a central role for NPR1 in the photoperiod stress response as npr1-1 mutants were stress-insensitive. Photoperiod stress treatment led to a strong increase in camalexin levels which is also observed in response to pathogen infections. Photoperiod stress induced the resistance of Arabidopsis plants to a subsequent infection by Pseudomonas syringae pv. tomato DC3000 indicating priming of the defence response. Together, photoperiod stress causes transcriptional reprogramming resembling plant pathogen defence responses and induces systemic acquired resistance in the absence of a pathogen.
2022-02-28 | GSE173899 | GEO
Project description:Transcriptomics study of F2 siblings with different dormancy responsiveness due to photoperiod subjected to long day and short day. F2 040 and F2 110 genotypes were previously described as part of a larger F2 population (Fennell et al., 2005, Acta Hort 689:533-539). The F2 040 and 110 genotypes exhibit photoperiod responsive characteristics similar to the Seyval and V. riparia grandparent, respectively (Fennell et al., 2015, doi: 10.3389/fpls.2015.00834)
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Project description:We used whole-genome microarrays to identify differentially expressed genes in leaves of GA-deficient (35S::PcGA2ox) and/or GA-insensitive (35S::rgl1) transgenics as compared to WT poplar (717-1B4 genotype). Our work suggests that the molecular machinery that reduces gibberellins (GAs) concentration and signaling is a major route for restraining growth under both immediate and imminent adverse conditions. We show that inhibition of growth as a result of water deprivation and short days (SDs) coincides with up-regulation of several DELLA and GA2ox encoding genes in poplar. Likewise, GA-deficient and GA-insensitive transgenics, with up-regulated GA2ox and DELLA domain proteins, elicited a hypersensitive growth inhibition in response to both drought and SDs. Because the GA-modified transgenic showed accelerated response to drought and SD, we hypothesized that the mechanisms associated with these responses are constitutively elevated even under control conditions (well-watered, long day photoperiod). Therefore, we used whole-genome poplar microarray to study transcriptome level changes in the leaves of transgenic compared to WT plants grown under control environment. Genetic background for all plants was INRA 717-1B clone (Populus tremula x Populus alba). Expression analysis was preformed on three individual genotypes; wild-type (WT, untransformed control), 35S::PcGA2ox and 35S::rgl1. Leaves from two independent biological replicates per genotype were used, each pooled from 20 clonally propagated plants.
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Project description:Low temperature exposure during early vegetative stages limits rice plant’s growth and development. Most genes previously related to cold tolerance in rice are from the japonica subspecies. To help clarify the mechanisms that regulate cold tolerance in young indica rice plants, comparative transcriptome analysis of 6 h cold-treated leaves from two genotypes, cold-tolerant and cold-sensitive, was performed. The cold-tolerant and cold-sensitive genotypes were previously characterized, and are sister lines (derived from the same crossing).
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Project description:The discovery of photoperiod-sensitive male genic sterile (PGMS) lines started the development of two-line hybrid rice, which is critical to sustain production of high-yielding hybrid rice varieties. Previous reports about the PGMS lines are mainly focused on the gene cloning and their function description. The mechanisms by which PGMS lines perceive changes in photoperiod and transmit those signals to elicit downstream effects is rarely mentioned. In this work, we described the effects of photoperiod on gene expression in wild type (WT) and csa, a PGMS line, flag leaves and anthers to identify putative central factors that transduce photoperiod signals via CSA in both leaves and anthers. We also dissect the potential mechanisms that: cause csa-induced sterility under SD conditions; partially restore fertility in csa anthers under LD conditions; and finally, are responsible to restore full WT fertility under LD and SD conditions. These results provide an overview how the PGMS rice perceives and transmits photoperiod changes, and how the CSA and its homologs response to the environmental cues by regulating down-stream gene expression. That will be helpful to understand the photoperiod-sensitive mechanism and identify new photoperiod-sensitive genes.
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2022-03-16 | GSE190755 | GEO
Project description:Plants regulate their time to flowering by gathering information from the environment. Photoperiod and temperature are among the most important environmental variables. Suboptimal, but not near-freezing, temperatures regulate flowering through the thermosensory pathway, which overlaps with the autonomous pathway. Here we show that ambient temperature regulates flowering by two genetically distinguishable pathways, one that requires TFL1 and another that requires ELF3. The delay in flowering time observed at lower temperatures was partially suppressed in single elf3 and tfl1 mutants, whereas double elf3 tfl1 mutants were insensitive to temperature. tfl1 mutations abolished the temperature response in cryptochrome mutants that are deficient in photoperiod perception, but not in phyB mutants that have a constitutive photoperiodic response. Contrary to tfl1, elf3 mutations were able to suppress the temperature response in phyB mutants, but not in cryptochrome mutants. The gene expression profile revealed that the tfl1 and elf3 effects are due to the activation of different sets of genes and identified CCA1 and SOC1/AGL20 as being important cross talk points. Finally, genome-wide gene expression analysis strongly suggests a general and complementary role for ELF3 and TFL1 in temperature signalling. Three genotypes, WT (Columbia), elf3-7 and tfl1-1 mutants. Three biological replicates for each condition (genotype X temperature combination). RNA prepared independently for each sample.
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