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ABSTRACT:
PROVIDER: PRJNA643894 | ENA |
REPOSITORIES: ENA
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Project description:The growth and persistence of rhizobia and bradyrhizobia in soils are negatively impacted by drought conditions. In this study, we used genome-wide transcriptional analyses to obtain a comprehensive understanding of the response of Bradyrhizobium japonicum to drought. Desiccation of cells resulted in the differential expression of 15 to 20% of the 8,480 B. japonicum open reading frames, with considerable differentiation between early (after 4 h) and late (after 24 and 72 h) expressed genes. While 225 genes were universally up-regulated at all three incubation times in response to desiccation, an additional 43 and 403 up-regulated genes were common to the 4/24- and 24/72-h incubation times, respectively. Desiccating conditions resulted in the significant induction (>2.0-fold) of the trehalose-6-phosphate synthetase (otsA), trehalose-6-phosphate phosphatase (otsB), and trehalose synthase (treS) genes, which encode two of the three trehalose synthesis pathways found in B. japonicum. Gene induction was correlated with an elevated intracellular concentration of trehalose and increased activity of trehalose-6-phosphate synthetase, collectively supporting the hypothesis that this disaccharide plays a prominent and important role in promoting desiccation tolerance in B. japonicum. Microarray data also indicated that sigma(54)- and sigma(24)-associated transcriptional regulators and genes encoding isocitrate lyase, oxidative stress responses, the synthesis and transport of exopolysaccharides, heat shock response proteins, enzymes for the modification and repair of nucleic acids, and the synthesis of pili and flagella are also involved in the response of B. japonicum to desiccation. Polyethylene glycol-generated osmotic stress induced significantly fewer genes than those transcriptionally activated by desiccation. However, 67 genes were commonly induced under both conditions. Taken together, these results suggest that B. japonicum directly responds to desiccation by adapting to changes imparted by reduced water activity, such as the synthesis of trehalose and polysaccharides and, secondarily, by the induction of a wide variety of proteins involved in protection of the cell membrane, repair of DNA damage, stability and integrity of proteins, and oxidative stress responses. Keywords: stress response; time course
2007-09-25 | GSE9125 | GEO
Project description:Characterization of AceA regulons in Bradyrhizobium japonicum under desiccation stress
| PRJNA287441 | ENA
Project description:Differential gene expression was analyzed between B. japonicum wild type (Bj110) and aceA mutant (BjΔaceA) exposed to desiccation stress to find AceA regulons under the culture condition.
2015-07-21 | GSE69999 | GEO
Project description:This series represents the rehydration series of the human 293h media depleted storage on agarose / rehydration condition course analysis. Samples include Control Monolayer, 0 hr desiccation, 0 hr rehydration, 6 hr rehydration, 24 hr rehydration, and 72 hr rehydration. Keywords = 293h cells Keywords = desiccation Keywords = rehydration Keywords = spheroid Keywords = stabilization Keywords = ambient temperature Keywords: other
2005-08-01 | GSE1455 | GEO
Project description:This series represents Experiment 3 of the yeast desiccation / rehydration time course analysis. Samples include Control, 50% dry, Dry, 15 min. post rehydration, 45 min. post rehydration, 90 min. post rehydration, and 360 min. post rehydration. Keywords = BY4743 Keywords = desiccation Keywords = glucose-limited Keywords = rehydration Keywords = yeast Keywords: time-course
2005-08-01 | GSE1313 | GEO
Project description:This series represents Experiment 2 of the yeast desiccation / rehydration time course analysis. Samples include Control, 50% dry, Dry, 15 min. post rehydration, 45 min. post rehydration, 90 min. post rehydration, and 360 min. post rehydration. Keywords = BY4743 Keywords = desiccation Keywords = glucose-limited Keywords = rehydration Keywords = yeast Keywords: time-course
2005-08-01 | GSE1312 | GEO
Project description:This series represents Experiment 1 of the yeast desiccation / rehydration time course analysis. Samples include Control, 50% dry, Dry, 15 min. post rehydration, 45 min. post rehydration, 90 min. post rehydration, and 360 min. post rehydration. Keywords = BY4743 Keywords = desiccation Keywords = glucose-limited Keywords = rehydration Keywords = yeast Keywords: time-course
2005-08-01 | GSE1311 | GEO
Project description:Seaweeds in the upper intertidal zone experience extreme desiccation during low tide, followed by rapid rehydration during high tide. Porphyra sensu lato are typical upper intertidal seaweeds. Thus, it is valuable to investigate the adaptive conditions and mechanisms of seaweed to desiccation-rehydration stress.
2022-03-02 | PXD030324 | Pride
Project description:A study to explore the transcriptome response of hymenophyllum caudiculatum in a desiccation-rehydration cycle using high-throughput sequencing (Illumina).
2019-11-19 | GSE140238 | GEO
Project description:A study to explore the transcriptome response of hymenophyllum dentatum in a desiccation-rehydration cycle using high-throughput sequencing (Illumina).
2019-11-19 | GSE140234 | GEO