Evidence for the up-regulation of stearoyl-ACP (Δ9) desaturase gene expression during cold acclimation

2004 ◽  
Vol 81 (2) ◽  
pp. 125-135 ◽  
Author(s):  
Sandra E. Vega ◽  
Alfonso H. del Rio ◽  
John B. Bamberg ◽  
Jiwan P. Palta
Keyword(s):  
Gene Expression ◽  
Cold Acclimation ◽  
Desaturase Gene ◽  
Δ9 Desaturase

scholarly journals Dual regulation of mouse Δ5- and Δ6-desaturase gene expression by SREBP-1 and PPARα

2002 ◽  
Vol 43 (1) ◽  
pp. 107-114 ◽  
Author(s):  
Takashi Matsuzaka ◽  
Hitoshi Shimano ◽  
Naoya Yahagi ◽  
Michiyo Amemiya-Kudo ◽  
Tomohiro Yoshikawa ◽  
...  
Keyword(s):  
Gene Expression ◽  
Desaturase Gene ◽  
Δ6 Desaturase

Signal Transduction and Gene Expression During Cold Acclimation of Alfalfa

2018 ◽  
pp. 57-71
Author(s):  
Rajinder S. Dhindsa ◽  
Antonio Monroy ◽  
Lawrence Wolfraim ◽  
Guangyuan Dong
Keyword(s):  
Gene Expression ◽  
Signal Transduction ◽  
Cold Acclimation

Cold acclimation and cold-regulated gene expression in ABA mutants of Arabidopsis thaliana

1991 ◽  
Vol 17 (6) ◽  
pp. 1233-1240 ◽  
Author(s):  
Sarah J. Gilmour ◽  
Michael F. Thomashow
Keyword(s):  
Gene Expression ◽  
Arabidopsis Thaliana ◽  
Cold Acclimation ◽  
Regulated Gene Expression

scholarly journals Cold Acclimation of the Thermoacidophilic Red Alga Galdieria sulphuraria: Changes in Gene Expression and Involvement of Horizontally Acquired Genes

2018 ◽  
Vol 60 (3) ◽  
pp. 702-712 ◽  
Author(s):  
Alessandro W Rossoni ◽  
Gerald Sch�nknecht ◽  
Hyun Jeong Lee ◽  
Ryan L Rupp ◽  
Samantha Flachbart ◽  
...  
Keyword(s):  
Gene Expression ◽  
Gene Transfer ◽  
Horizontal Gene Transfer ◽  
Cold Acclimation ◽  
Growth Temperature ◽  
Toxic Metal ◽  
Optimal Growth ◽  
Red Alga ◽  
Galdieria Sulphuraria ◽  
Cold Temperatures

Abstract Galdieria sulphuraria is a unicellular red alga that lives in hot, acidic, toxic metal-rich, volcanic environments, where few other organisms survive. Its genome harbors up to 5% of genes that were most likely acquired through horizontal gene transfer. These genes probably contributed to G.sulphuraria’s adaptation to its extreme habitats, resulting in today’s polyextremophilic traits. Here, we applied RNA-sequencing to obtain insights into the acclimation of a thermophilic organism towards temperatures below its growth optimum and to study how horizontally acquired genes contribute to cold acclimation. A decrease in growth temperature from 42�C/46�C to 28�C resulted in an upregulation of ribosome biosynthesis, while excreted proteins, probably components of the cell wall, were downregulated. Photosynthesis was suppressed at cold temperatures, and transcript abundances indicated that C-metabolism switched from gluconeogenesis to glycogen degradation. Folate cycle and S-adenosylmethionine cycle (one-carbon metabolism) were transcriptionally upregulated, probably to drive the biosynthesis of betaine. All these cold-induced changes in gene expression were reversible upon return to optimal growth temperature. Numerous genes acquired by horizontal gene transfer displayed temperature-dependent expression changes, indicating that these genes contributed to adaptive evolution in G.sulphuraria.

scholarly journals Freezing Tolerance of Lolium multiflorum/Festuca arundinacea Introgression Forms is Associated with the High Activity of Antioxidant System and Adjustment of Photosynthetic Activity under Cold Acclimation

2020 ◽  
Vol 21 (16) ◽  
pp. 5899 ◽  
Author(s):  
Adam Augustyniak ◽  
Izabela Pawłowicz ◽  
Katarzyna Lechowicz ◽  
Karolina Izbiańska-Jankowska ◽  
Magdalena Arasimowicz-Jelonek ◽  
...  
Keyword(s):  
Gene Expression ◽  
Reactive Oxygen Species ◽  
Cold Acclimation ◽  
Antioxidant System ◽  
Freezing Tolerance ◽  
Photosynthetic Apparatus ◽  
Reactive Oxygen Species Generation ◽  
Reactive Oxygen ◽  
Protein Accumulation ◽  
Oxygen Species

Though winter-hardiness is a complex trait, freezing tolerance was proved to be its main component. Species from temperate regions acquire tolerance to freezing in a process of cold acclimation, which is associated with the exposure of plants to low but non-freezing temperatures. However, mechanisms of cold acclimation in Lolium-Festuca grasses, important for forage production in Europe, have not been fully recognized. Thus, two L. multiflorum/F. arundinacea introgression forms with distinct freezing tolerance were used herein as models in the comprehensive research to dissect these mechanisms in that group of plants. The work was focused on: (i) analysis of cellular membranes’ integrity; (ii) analysis of plant photosynthetic capacity (chlorophyll fluorescence; gas exchange; gene expression, protein accumulation, and activity of selected enzymes of the Calvin cycle); (iii) analysis of plant antioxidant capacity (reactive oxygen species generation; gene expression, protein accumulation, and activity of selected enzymes); and (iv) analysis of Cor14b accumulation, under cold acclimation. The more freezing tolerant introgression form revealed a higher integrity of membranes, an ability to cold acclimate its photosynthetic apparatus and higher water use efficiency after three weeks of cold acclimation, as well as a higher capacity of the antioxidant system and a lower content of reactive oxygen species in low temperature.

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