scholarly journals The Arabidopsis 14-3-3 Protein RARE COLD INDUCIBLE 1A Links Low-Temperature Response and Ethylene Biosynthesis to Regulate Freezing Tolerance and Cold Acclimation

2014 ◽  
Vol 26 (8) ◽  
pp. 3326-3342 ◽  
Author(s):  
Rafael Catalá ◽  
Rosa López-Cobollo ◽  
M. Mar Castellano ◽  
Trinidad Angosto ◽  
José M. Alonso ◽  
...  
Keyword(s):  
Low Temperature ◽  
Cold Acclimation ◽  
Freezing Tolerance ◽  
Temperature Response ◽  
Ethylene Biosynthesis

scholarly journals Differential Cold Acclimation Ability of Petunia spp.

HortScience ◽  
2009 ◽  
Vol 44 (5) ◽  
pp. 1219-1222 ◽  
Author(s):  
Aaron E. Walworth ◽  
Ryan M. Warner
Keyword(s):  
Low Temperature ◽  
Cold Acclimation ◽  
Freezing Tolerance ◽  
Electrolyte Leakage ◽  
Petunia Hybrida ◽  
Leaf Tissue ◽  
Wild Germplasm ◽  
Plant Family ◽  
Solanaceae Species ◽  
Short Days

Freezing tolerance of many plant species increases after exposure to low, nonfreezing temperatures, a process termed cold acclimation. In some species, shortened photoperiods also bring about an increase in freezing tolerance. Within the plant family Solanaceae, species vary widely in cold acclimation ability. The objectives of this work were to examine the effects of low temperature and photoperiod on cold acclimation of Petunia hybrida (Hook.) Vilm. ‘Mitchell’ and to evaluate cold acclimation of several Petunia species by measuring freezing tolerance using an electrolyte leakage assay on leaf tissue discs. Temperature, but not photoperiod, influenced cold acclimation of P. hybrida. Whether grown under long days or short days, nonacclimated plants had an EL50 value (temperature at which 50% of cellular electrolytes are lost) of ≈–2 °C. Plants acclimated by gradual cooling at temperatures of 15 °C, 10 °C, and 3 °C for 7 days each reached an EL50 of ≈–5 °C regardless of photoperiod. Exposure to 3 °C under short days for 1 or 3 weeks resulted in EL50 temperatures of –3.9 and –4.9 °C, respectively. Freezing tolerance of petunia species P. exserta Stehmann, P. integrifolia (Hook.) Schinz & Thell., P. axillaris (Lam.) Britton et al. (USDA accessions 28546 and 28548), and P. hybrida ‘Mitchell’ was similar before cold acclimation, but varied from –5 °C for P. exserta to –8 °C for P. axillaris (accession 28548) after cold acclimation. Our results demonstrate the cold acclimation ability of Petunia spp. and identify wild germplasm sources with potential usefulness for improving freezing tolerance of cultivated petunia.

Plasmalemma alteration during cold acclimation of Hedera helix bark

1978 ◽  
Vol 56 (2) ◽  
pp. 196-205 ◽  
Author(s):  
Darryl G. Stout ◽  
Peter L. Steponkus ◽  
Robert M. Cotts
Keyword(s):  
Low Temperature ◽  
Relaxation Rate ◽  
Cold Acclimation ◽  
Water Permeability ◽  
Cold Hardiness ◽  
Temperature Response ◽  
Functional Change ◽  
Transverse Relaxation Rate ◽  
Hedera Helix ◽  
Transverse Relaxation

The transverse relaxation rate of water protons of nonacclimated Hedera helix L. cv. Thorndale (ivy) bark decreased in the presence of added extracellular Ca2+, Mg2+, or CO2. Evidence that the decreased transverse relaxation rate is due to decreased plasmalemma water permeability is presented. The decrease in plasmalemma water permeability induced by Ca2+ and CO2 was less in cold-acclimated ivy bark than in nonacclimated ivy bark, indicating that the process of cold acclimation altered a functional property of the plasmalemma. It is not known if the functional change in the plasmalemma is related to the degree of plant cold hardiness or is simply a low temperature response.

scholarly journals The Impact of Far-Red Light Supplementation on Hormonal Responses to Cold Acclimation in Barley

Biomolecules ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 450
Author(s):  
Mohamed Ahres ◽  
Tamás Pálmai ◽  
Krisztián Gierczik ◽  
Petre Dobrev ◽  
Radomíra Vanková ◽  
...  
Keyword(s):  
Low Temperature ◽  
Cold Acclimation ◽  
Freezing Tolerance ◽  
White Light ◽  
Expression Profiles ◽  
Red Light ◽  
Moderate Increase ◽  
Hormone Metabolism ◽  
Pre Treatment ◽  
The Impact

Cold acclimation, the necessary prerequisite for promotion of freezing tolerance, is affected by both low temperature and enhanced far-red/red light (FR/R) ratio. The impact of FR supplementation to white light, created by artificial LED light sources, on the hormone levels, metabolism, and expression of the key hormone metabolism-related genes was determined in winter barley at moderate (15 °C) and low (5 °C) temperature. FR-enhanced freezing tolerance at 15 °C was associated with promotion of abscisic acid (ABA) levels, and accompanied by a moderate increase in indole-3-acetic acid (IAA) and cis-zeatin levels. The most prominent impact on the plants’ freezing tolerance was found after FR pre-treatment at 15 °C (for 10 days) followed by cold treatment at FR supplementation (7 days). The response of ABA was diminished in comparison with white light treatment, probably due to the elevation of stress tolerance during FR pre-treatment. Jasmonic acid (JA) and salicylic acid (SA) were transiently reduced. When the plants were exposed directly to a combination of cold (5 °C) and FR supplementation, ABA increase was higher than in white light, and was associated with enhanced elevation of JA and, in the longer term (after 7 days), with IAA and cis-zeatin increase, which indicates a stronger stress response and better acclimation. Cold hardening was more efficient when FR light was applied in the early developmental stage of the barley plants (three-leaf stage, 18 days), rather than in later stages (28-days). The dynamics of the phytohormone changes are well supported by the expression profiles of the key hormone metabolism-related genes. This series of treatments serves as evidence for the close relationship between plant hormones, light quality, and low temperature at the beginning of cold acclimation. Besides the timing of the FR treatments, plant age also represents a key factor during light spectrum-dependent cold acclimation.

scholarly journals The low temperature response pathways for cold acclimation and vernalization are independent

2011 ◽  
Vol 34 (10) ◽  
pp. 1737-1748 ◽  
Author(s):  
DONNA M. BOND ◽  
ELIZABETH S. DENNIS ◽  
E. JEAN FINNEGAN
Keyword(s):  
Low Temperature ◽  
Cold Acclimation ◽  
Temperature Response

scholarly journals Putrescine Is Involved in Arabidopsis Freezing Tolerance and Cold Acclimation by Regulating Abscisic Acid Levels in Response to Low Temperature

2008 ◽  
Vol 148 (2) ◽  
pp. 1094-1105 ◽  
Author(s):  
Juan C. Cuevas ◽  
Rosa López-Cobollo ◽  
Rubén Alcázar ◽  
Xavier Zarza ◽  
Csaba Koncz ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Low Temperature ◽  
Cold Acclimation ◽  
Freezing Tolerance

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.

Growth, freezing tolerance, and yield performance of alfalfa (Medicago sativaL.) cultivars grown under controlled and field conditions in northern latitudes

2018 ◽  
Vol 98 (5) ◽  
pp. 1109-1118 ◽  
Author(s):  
Mervi M. Seppänen ◽  
Ville Alitalo ◽  
Hanna K. Bäckström ◽  
Kirsi Mäkiniemi ◽  
Venla Jokela ◽  
...  
Keyword(s):  
Field Experiment ◽  
Cold Acclimation ◽  
Freezing Tolerance ◽  
Field Experiments ◽  
Starch Content ◽  
Day Length ◽  
Forage Legume ◽  
Northern Latitudes ◽  
Medicago Sativa L ◽  
Second Year

Alfalfa (Medicago sativa L.) is one of the most popular forage legume crops worldwide. Its cultivation in the boreal and sub-boreal zone is restricted by inadequate winter hardiness, but global warming may increase its adaptability in these latitudes. Here, we examined variation in growth and freezing tolerance of four alfalfa cultivars recommended for the northern temperate climates of Europe (Alexis, Lavo, Live, and Nexus) and two cultivars with adaptation to milder or Mediterranean climates (Rangelander and Hunter River). Two experiments under controlled conditions (growth cessation and cold acclimation experiments) along with a 2-yr field experiment were conducted. Lavo was the most freezing-tolerant cultivar in both the cold acclimation and field experiments. Both Rangelander and Hunter River showed poor freezing tolerance. Lavo responded to decreasing temperatures, unlike the response to shorter day length, by allocating biomass to the roots. In general, better freezing tolerance was associated with high total nonstructural carbohydrate and low starch content. The field experiment results revealed that the more freezing-tolerant cultivars may have some advantages regarding yield, especially in the second year, but the differences between the cultivars were modest.

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