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Total transcriptome profiling of the Atclb1-1 loss of function mutant and wild type of Arabidopsis

ABSTRACT: Since AtCLB act as a negative regulator of abiotic stress response, we asked the question as to what additional factors might be contributing towards stress tolerance in Atclb1-1 loss of function mutants. One approach to find answers to this question would be to see which pathways or genes are being affected in mutant plants due to the disruption of AtCLB gene function. To achieve this, we sought a global transcriptome profiling of the mutant plant in comparison to its wild type counterpart.

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE48851 | GEO | 2013/12/15

SECONDARY ACCESSION(S): PRJNA211978

REPOSITORIES: GEO

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Total transcriptome profiling of the Atclb1-1 loss of function mutant and wild type of Arabidopsis

Project description:Since AtCLB act as a negative regulator of abiotic stress response, we asked the question as to what additional factors might be contributing towards stress tolerance in Atclb1-1 loss of function mutants. One approach to find answers to this question would be to see which pathways or genes are being affected in mutant plants due to the disruption of AtCLB gene function. To achieve this, we sought a global transcriptome profiling of the mutant plant in comparison to its wild type counterpart. We analyzed the Atclb1-1 loss of function mutant and wild type Arabidopsis transcriptomes by RNA sequencing in an Illumina genome analyzer platform. From the analysis, we grouped all differentially expressed genes into various functional categories based on their biological process, molecular function and cellular component

2013-12-15 | E-GEOD-48851 | biostudies-arrayexpress

The LSM1-7 Complex Differentially Regulates Arabidopsis Tolerance to Abiotic Stress Conditions by Promoting Selective mRNA Decapping

Project description:We report the role of LSM1-7 complex in the Arabidopsis tolerance to abiotic stresses. LSM1-7 controls gene expression reprogramming at the post-transcriptional level by promoting the decapping of mRNA. This function is selectively achieve over selected stress-induced transcripts depending on stress nature.

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Arabidopsis NRP switches off the PP6 phosphatase FyPP3 to repress auxin-mediated growth in response to abscisic acid

Project description:How environmentally challenged plants can switch from growth to stress adaptation is an important question in plant physiology. To identify the key regulatory proteins and to characterize the underlying signaling pathways are essential in answering this question. Here we show that the abiotic stress hormone Abscisic acid (ABA) induces the expression of the Asparagine rich proteins (NRP), DCD1 and DCD2, to repress the auxin-induced growth by promoting vacuolar degradation of PIN2, the auxin efflux carrier. ABA-induced degradation of PIN2 is inhibited in the dcd1 dcd2 double mutant, and inhibition of FyPP3, the catalytic subunit of the PP6 protein phosphatase, can restore the PIN recycling and growth phenotype in the double mutant. Transcriptome analyses on WT, dcd1 dcd2, the FyPP3 Dominant Negative line (FyPP3-DN), and dcd1 dcd2/FyPP3-DN supported the essential function of the NRP-FyPP3 module in the growth- to stress-response switch.

2020-05-16 | GSE150648 | GEO

Transcriptomic analysis of the voz1 voz2 double mutant

Project description:Plants adapt to abiotic and biotic stresses by activating abscisic acid-mediated (ABA) abiotic stress-responsive and salicylic acid-(SA) or jasmonic acid-mediated (JA) biotic stress-responsive pathways, respectively. Although the abiotic stress-responsive pathway interacts antagonistically with the biotic stress-responsive pathways, the mechanisms that regulate these pathways remain largely unknown. In this study, we provide insight into the function of vascular plant one-zinc-finger proteins (VOZs) that modulate various stress responses in Arabidopsis. The expression of many stress-responsive genes was changed in the voz1voz2 double mutant under normal growth conditions. Consistent with altered stress-responsive gene expression, freezing- and drought-stress tolerances were increased in the voz1voz2 double mutant. In contrast, resistance to a fungal pathogen, Colletotrichum higginsianum, and to a bacterial pathogen, Pseudomonas syringae, was severely impaired. Thus, impairing VOZ function simultaneously conferred increased abiotic tolerance and biotic stress susceptibility. In a chilling stress condition, both the VOZ1 and VOZ2 mRNA expression levels and the VOZ2 protein level gradually decreased. VOZ2 degradation during cold exposure was completely inhibited by the addition of the 26S proteasome inhibitor, MG132, a finding that suggested that VOZ2 degradation is dependent on the ubiquitin/26S proteasome system. In voz1voz2, ABA-inducible transcription factor CBF4 expression was enhanced significantly even under normal growth conditions, despite an unchanged endogenous ABA content. A finding that suggested that VOZs negatively affect CBF4 expression in an ABA-independent manner. These results suggest that VOZs function as both negative and positive regulators of the abiotic and biotic stress-responsive pathways, and control Arabidopsis adaptation to various stress conditions.

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A plant-specific splicing factor RS33 regulates abiotic stress responses in rice

Project description:Here, we investigated the function of the plant-specific SR protein RS33 in pre-mRNA splicing regulation and abiotic stress responses in rice. The loss-of-function mutant, rs33, showed increased sensitivity to salt and low-temperature stress. Genome-wide analyses of gene expression and splicing in seedlings subjected to these stresses identified multiple splice isoforms from stress-responsive genes dependent on RS33. The number of RS33-regulated genes is much higher under low-temperature stress as compared to salt stress. Our results suggest that this plant-specific splicing factor plays crucial and distinct roles during plant adaptation to abiotic stresses.

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SCR106 splicing factor modulates abiotic stress responses by maintaining the RNA splicing in rice

Project description:We investigated the function of the plant-specific SR protein SC106 in pre-mRNA splicing regulation and abiotic stress responses in rice. The loss-of-function mutant, SC106, showed increased sensitivity to salt. We performed genome-wide analyses of gene expression and splicing in seedlings subjected to salt stress and identified multiple splice isoforms from stress-responsive genes dependent on SC106.

2023-10-26 | GSE232160 | GEO

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Evolutionary potential, cross-stress behavior and the genetic basis of acquired stress resistance in Escherichia coli

Project description:We evolved Escherichia coli cells over 500 generations under five environments that include four abiotic stressors: osmotic, acidic, oxidative, n-butanol, and control The goal of the experiment: Bacterial populations have a remarkable capacity to cope with extreme environmental fluctuations in their natural environments. In certain cases, adaptation to one stressful environment provides a fitness advantage when cells are exposed to a second stressor, a phenomenon that has been coined as cross-stress protection. A tantalizing question in bacterial physiology is how the cross-stress behavior emerges during adaptation and what the genetic basis of acquired stress resistance is. RNA profiles were obtained for six E. coli strains evolved for 500 generations under abiotic stressors; two technical replicates for each strain where sequenced by Illumina GAII analyzer

2013-02-28 | E-GEOD-39926 | biostudies-arrayexpress

AtBRO1, BRO1-like domain-containing protein, modulates growth and abiotic stress responses in Arabidopsis

Project description:Plants physiological mechanisms are affected by Abscisic acid (ABA) via changing gene expression and empowers plants to adapt in numerous environments. Plants have evolved their protection mechanisms for seed germination and abiotic environments to deal with critical harsh conditions. Here, we have explored those changes in Arabidopsis thaliana plants subjected to multiple abiotic stresses. AtBro1 transcripts showed up-regulation in the presence of salt, ABA and mannitol stress conditions. AtBRO1 over-expression lines exhibited robust tolerance to drought and salt stress. Further, ABA elicits resistance responses in loss-of-function bro1-1 mutant plants and AtBro1 positively regulates drought resistance in Arabidopsis. Promoter of AtBro1 fused with GUS showed GUS expression mainly in the rosette leaves and floral clusters, especially in anthers. AtBro1 protein was found to be localized in the plasma membrane of Arabidopsis at the subcellular level by using AtBro1::GFP fusion. Using a broad RNA-sequencing analysis, we observed that early transcriptional responses prompted by ABA induction exhibit specific quantitative differences at different time points, suggesting that ABA stimulates resistance responses in bro1-1 mutant plants. Additionally, transcripts levels of MOP9.5, MRD1, HEI10, and MIOX4 were altered in loss-of-function mutant plants which are involved in different stress conditions. Collectively, our results have shown that AtBro1 is involved in a significant role by regulating plant transcriptional response to ABA and induction of resistance response against abiotic stress.

2023-04-18 | GSE225062 | GEO

Transcriptome analysis of Osbhlh148 mutant plants under controlled drought stress and well-watered conditions at vegetative stage

Project description:The members of bHLH transcription factor superfamily are known to play key role in plant development and abiotic stress response. Loss-of-function of OsbHLH148 gene resulted in increased sensitivity of rice plants to drought stress. To identify the targets of OsbHLH148 and dissect the drought stress response pathway regulated by it, we performed transcriptome profiling of Osbhlh148 mutant plants under drought stress as well as well-watered conditions by RNA-sequencing.

2015-01-16 | GSE65024 | GEO

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