scholarly journals Independent Activation of Cold Acclimation by Low Temperature and Short Photoperiod in Hybrid Aspen

2002 ◽  
Vol 129 (4) ◽  
pp. 1633-1641 ◽  
Author(s):  
Annikki Welling ◽  
Thomas Moritz ◽  
E. Tapio Palva ◽  
Olavi Junttila
Keyword(s):  
Low Temperature ◽  
Cold Acclimation ◽  
Short Photoperiod ◽  
Hybrid Aspen

scholarly journals Dissecting the Roles of Cuticular Wax in Plant Resistance to Shoot Dehydration and Low-Temperature Stress in Arabidopsis

2021 ◽  
Vol 22 (4) ◽  
pp. 1554
Author(s):  
Tawhidur Rahman ◽  
Mingxuan Shao ◽  
Shankar Pahari ◽  
Prakash Venglat ◽  
Raju Soolanayakanahally ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Low Temperature ◽  
Cold Acclimation ◽  
Water Loss ◽  
Cuticular Wax ◽  
Dehydration Stress ◽  
Wax Deposition ◽  
Cuticular Waxes ◽  
Gas Chromatography Mass Spectroscopy

Cuticular waxes are a mixture of hydrophobic very-long-chain fatty acids and their derivatives accumulated in the plant cuticle. Most studies define the role of cuticular wax largely based on reducing nonstomatal water loss. The present study investigated the role of cuticular wax in reducing both low-temperature and dehydration stress in plants using Arabidopsis thaliana mutants and transgenic genotypes altered in the formation of cuticular wax. cer3-6, a known Arabidopsis wax-deficient mutant (with distinct reduction in aldehydes, n-alkanes, secondary n-alcohols, and ketones compared to wild type (WT)), was most sensitive to water loss, while dewax, a known wax overproducer (greater alkanes and ketones compared to WT), was more resistant to dehydration compared to WT. Furthermore, cold-acclimated cer3-6 froze at warmer temperatures, while cold-acclimated dewax displayed freezing exotherms at colder temperatures compared to WT. Gas Chromatography-Mass Spectroscopy (GC-MS) analysis identified a characteristic decrease in the accumulation of certain waxes (e.g., alkanes, alcohols) in Arabidopsis cuticles under cold acclimation, which was additionally reduced in cer3-6. Conversely, the dewax mutant showed a greater ability to accumulate waxes under cold acclimation. Fourier Transform Infrared Spectroscopy (FTIR) also supported observations in cuticular wax deposition under cold acclimation. Our data indicate cuticular alkane waxes along with alcohols and fatty acids can facilitate avoidance of both ice formation and leaf water loss under dehydration stress and are promising genetic targets of interest.

Low Temperature Induced Biochemical Mechanisms: Implications for Cold Acclimation and De-Acclimation

1993 ◽  
pp. 647-657 ◽  
Author(s):  
C. Stushnoff ◽  
R. L. Remmele ◽  
V. Essensee ◽  
M. McNeil
Keyword(s):  
Low Temperature ◽  
Cold Acclimation ◽  
Biochemical Mechanisms

Cold Acclimation Proteome Analysis Reveals Close Link between the Up-Regulation of Low-Temperature Associated Proteins and Vernalization Fulfillment

2010 ◽  
Vol 9 (11) ◽  
pp. 5658-5667 ◽  
Author(s):  
Elham Sarhadi ◽  
Siroos Mahfoozi ◽  
Seyed Abdollah Hosseini ◽  
Ghasem Hosseini Salekdeh
Keyword(s):  
Low Temperature ◽  
Cold Acclimation ◽  
Proteome Analysis ◽  
Close Link ◽  
Associated Proteins

Cold Acclimation and Prolonged Low Temperature Survival of Filth Fly Parasites (Hymenoptera: Pteromalidae)

1986 ◽  
Vol 15 (4) ◽  
pp. 936-942 ◽  
Author(s):  
D. R. Guzman ◽  
J. J. Petersen
Keyword(s):  
Low Temperature ◽  
Cold Acclimation

Effect of parasitism by Anaphes sp. (Hymenoptera: Mymaridae) on the cold hardiness of Listronotus oregonensis (Coleoptera: Curculionidae) eggs

1993 ◽  
Vol 71 (4) ◽  
pp. 759-764 ◽  
Author(s):  
Thierry Hance ◽  
Guy Boivin
Keyword(s):  
Low Temperature ◽  
Cold Hardiness ◽  
Egg Parasitoids ◽  
Local Extinction ◽  
Short Photoperiod ◽  
Supercooling Point ◽  
Listronotus Oregonensis ◽  
Overwintering Site

The cold hardiness of egg parasitoids is critical to their survival in winter because these organisms have little control in the choice of their overwintering site. The supercooling points of Listronotus oregonensis eggs increased from −24.9 to −22.1 °C as eggs matured. When these eggs were parasitized by Anaphes sp., their supercooling point remained stable at −22.9 °C throughout the development of the parasitoid. Anaphes sp. maintained its cold hardiness by increasing its levels of glycerol and fructose. When the parental generation was exposed to a combination of low temperature and short photoperiod, the supercooling point of the daughter generation (F1) was significantly decreased. A further decrease in the supercooling point was observed when F1 individuals were stored at 3 °C for 14 or 20 days. These data show that local extinction of populations overwintering in nonsheltered habitats is probably common in southwestern Quebec.

scholarly journals Long and short photoperiod buds in hybrid aspen share structural development and expression patterns of marker genes

2015 ◽  
Vol 66 (21) ◽  
pp. 6745-6760 ◽  
Author(s):  
Päivi L.H. Rinne ◽  
Laju K. Paul ◽  
Jorma Vahala ◽  
Raili Ruonala ◽  
Jaakko Kangasjärvi ◽  
...  
Keyword(s):  
Expression Patterns ◽  
Short Photoperiod ◽  
Marker Genes ◽  
Structural Development ◽  
Hybrid Aspen

scholarly journals Metabolic Reprogramming and Its Role in Plant Cold Acclimation

2019 ◽  
Author(s):  
Lisa Fürtauer ◽  
Jakob Weiszmann ◽  
Wolfram Weckwerth ◽  
Thomas Nägele
Keyword(s):  
Low Temperature ◽  
Carbohydrate Metabolism ◽  
Cold Acclimation ◽  
Current Knowledge ◽  
Abiotic Factors ◽  
Freezing Temperature ◽  
Metabolic Reprogramming ◽  
Plant Distribution ◽  
Growth And Yield

Plants have evolved tightly regulated strategies to adapt and acclimate to a changing environment to ensure their survival. Various environmental factors affect plant distribution, growth and yield. Low temperature belongs to those abiotic factors which significantly constrain range boundaries of plant species. Exposing plants to low but non-freezing temperature induces a multigenic processes termed cold acclimation, which finally results in an increased freezing tolerance. Cold acclimation comprises reprogramming of the transcriptome, proteome and metabolome and affects communication and signaling between subcellular organelles. Reprogramming of the central carbohydrate metabolism plays a key role in cold acclimation. This review summarizes current knowledge about the role of carbohydrate metabolism in plant cold acclimation. A focus is laid on subcellular metabolic reprogramming, its thermodynamic constraints under low temperature and mathematical modelling of metabolism.

scholarly journals Dissecting the Roles of Cuticular Wax in Plant Resistance to Shoot Dehydration and Low-Temperature Stress in Arabidopsis

2020 ◽  
Author(s):  
Tawhidur Rahman ◽  
Mingxuan Shao ◽  
Shankar Pahari ◽  
Prakash Venglat ◽  
Raju Soolanayakanahally ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Low Temperature ◽  
Cold Acclimation ◽  
Water Loss ◽  
Cuticular Wax ◽  
Dehydration Stress ◽  
Wax Deposition ◽  
Cuticular Waxes ◽  
Leaf Water Loss

Cuticular waxes are a mixture of hydrophobic very-long-chain fatty acids and their derivatives accumulated in the plant cuticle. Most studies define the role of cuticular wax largely based on reducing non-stomatal water loss. The present study investigated the role of cuticular wax in reducing both low-temperature and dehydration stress in plants using Arabidopsis thaliana mutants and transgenic genotypes altered in the formation of cuticular wax. cer3-6, a known Arabidopsis wax-deficient mutant (with distinct reduction in aldehydes, n-alkanes, secondary n-alcohols, and ketones compared to wild type (WT)), was most sensitive to water loss; while dewax, a known wax overproducer (greater alkanes and ketones compared to WT), was more resistant to dehydration compared to WT. Furthermore, cold-acclimated cer3-6 froze at warmer temperatures, while cold-acclimated dewax displayed freezing exotherms at colder temperatures compared to WT. GC-MS analysis identified a characteristic decrease in the accumulation of certain waxes (e.g. alkanes, alcohols) in Arabidopsis cuticles under cold acclimation, which was additionally reduced in cer3-6. Conversely, the dewax mutant showed a greater ability to accumulate waxes under cold acclimation. FTIR spectroscopy also supported observations in cuticular wax deposition under cold acclimation. Our data indicate cuticular alkane waxes along with alcohols and fatty acids can facilitate avoidance of both ice formation and leaf water loss under dehydration stress, and are promising genetic targets of interest.

scholarly journals The RNA chaperone protein CspA stimulates translation during cold acclimation by promoting the progression of the ribosomes

2021 ◽  
Author(s):  
Anna Maria Giuliodori ◽  
Riccardo Belardinelli ◽  
Melodie Duval ◽  
Raffaella Garofalo ◽  
Emma Schenckbecher ◽  
...  
Keyword(s):  
Low Temperature ◽  
Cold Acclimation ◽  
Rna Binding ◽  
Structural Rearrangement ◽  
Translation Process ◽  
Ribosomal Subunits ◽  
Mrna Structure ◽  
Elongation Phase ◽  
Translation Systems ◽  
Dependent Mechanism

CspA is an RNA binding protein expressed during cold-shock in Escherichia coli, capable of stimulating translation of several mRNAs - including its own - at low temperature. We used reconstituted translation systems to monitor the effects of CspA on the different steps of the translation process and probing experiments to analyze the interactions with its target mRNAs. We specifically focused on cspA mRNA which adopts a cold-induced secondary structure at temperatures below 20°C and a more closed conformation at 37°C. We show that at low temperature CspA specifically promotes the translation of the mRNA folded in the conformation less accessible to the ribosome (37°C form). CspA interacts with its mRNA without inducing large structural rearrangement, does not bind the ribosomal subunits and is not able to stimulate the formation of the translation initiation complexes. On the other hand, CspA promotes the progression of the ribosomes during translation of its mRNA at low temperature and this stimulation is mRNA structure-dependent. A similar structure-dependent mechanism may be responsible for the CspA-dependent translation stimulation observed with other probed mRNAs, for which the transition to the elongation phase is progressively facilitated during cold acclimation with the accumulation of CspA.

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