Project description:In this study we used the Affymetrix Barley 1 GeneChip to investigate transcriptome responses of barley cv. Morex to low temperature, including triplicated measurements of cold, freeze/thaw cycles and de-acclimation over 33 days. Keywords: stress response
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:In this study we used the Affymetrix Barley 1 GeneChip to investigate transcriptome responses of barley cv. Dicktoo to low temperature, including triplicated measurements of cold, freeze/thaw cycles and de-acclimation over 33 days. Keywords: stress response
Project description:Abiotic stress causes disturbances in the cellular homeostasis. Re-adjustment of balance in carbon, nitrogen and phosphorus metabolism therefore plays a central role in stress adaptation. However, it is currently unknown which parts of the primary cell metabolism follow common patterns under different stress conditions and which represent specific responses. To address these questions, changes in transcriptome, metabolome and ionome were analyzed in maize source leaves from plants suffering low temperature, low nitrogen (N) and low phosphorus (P) stress. The selection of maize as study object provided data directly from an important crop species and the so far underexplored C4 metabolism. Growth retardation was comparable under all tested stress conditions. The only primary metabolic pathway responding similar to all stresses was nitrate assimilation, which was down-regulated. The largest group of commonly regulated transcripts followed the expression pattern: down under low temperature and low N, but up under low P. Several members of this transcript cluster could be connected to P metabolism and correlated negatively to different phosphate concentration in the leaf tissue. Accumulation of starch under low temperature and low N stress, but decrease in starch levels under low under low P conditions indicated that only low P treated leaves suffered carbon starvation. In conclusion, maize employs very different strategies for management of nitrogen and phosphorus metabolism under stress. While nitrate assimilation was regulated depending on demand by growth processes, phosphate concentrations changed depending on availability, thus building up reserves under excess conditions. Carbon and energy metabolism of the C4 maize leaves were particularly sensitive to P starvation.
Project description:In this study, a total of 12,059 differential genes and 131 differential metabolites were obtained, and they were mainly concentrated in signal transduction and phenylpropane metabolic pathways. In the process of low temperature signal transduction, the hosta is mainly through the ion channels on the three cell membranes of COLD, CNGCs and CRLK to transmit Ca2+ inside and outside the cell to sense temperature changes, and stimulate SCRM to combine with DREB through the MAPK signal pathway and Ca2+ signal sensors such as CBL. Strengthen the low temperature resistance of the purple calyx hosta. The phenylpropane metabolic pathway and the flavonoid metabolism pathway are the main metabolic pathways for the hosta to resist low temperature stress. The hosta protects itself from low temperature damage by increasing the content of Genistein, Scopolentin and Scopolin. It is speculated that the hosta also adjusts Sinapyl alcohole and Coniferyl alcohol content ratio can change the morphological structure of cell wall and enhance low temperature resistance.
Project description:Dimitry Y. Sorokin et al., (2021, Russian Academy of Sciences, Russia and Delft University of Technology, The Netherlands) describe the isolation and physiological and genomic properties of a fifth functional group of sulfur-respiring haloarchaea enriched from hypersaline lake sediments with CO as the electron donor. Additional shotgun proteomic profiling of the described strains has been performed.
Project description:Both high and low water temperature stresses are major environmental threats of growth and productivity in aquatic animals. However, the mechanism of response to temperature stress of scallop remains unclear. In this study, Argopecten irradians concentricus treated with high and cold temperature stress were analysed with the transcriptomes, metabolomes and integrated network analysis. Transcriptomic analyses revealed that there were many differentially expressed genes enriched calcium ion, kinase activity, phosphatase activity, and lipid related pathways between high temperature stress group and the control group. Although similar results were found in the low temperature stress group versus the control group, the genes enriched in these pathways were different. Moreover, much more genes were enriched in transcription factor activity in the low temperature stress group versus the control group