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86 results for “chilling”
Higher spring phenological sensitivity to forcing temperatures of Asian compared to European tree species under low and high pre-chilling conditions Datasets
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Supporting data for: A big chill: Examining an extremely sharp cold front from three perspectives
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Data from: Precise colocalization of sorghum’s major chilling tolerance locus with Tannin1 due to tight linkage drag rather than antagonistic pleiotropy
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Data from: Cold-acclimation increases depolarization resistance and tolerance in muscle fibers from a chill-susceptible insect, Locusta migratoria
<p>Cold exposure depolarizes cells in insects due to a reduced electrogenic ion transport and a gradual increase in extracellular [K<sup>+</sup>]. Cold-induced depolarization is linked to cold injury in chill-susceptible insects, and the locust, <i>Locusta migratoria</i>, has shown improved cold tolerance following cold-acclimation through depolarization resistance. Here we investigate how cold-acclimation influences depolarization resistance and how this resistance relates to improved cold tolerance. To address this question, we investigated if cold-acclimation affects the electrogenic transport capacity and/or the relative K<sup>+</sup> permeability during cold exposure by measuring membrane potentials of warm- and cold-acclimated locusts in the presence/absence of ouabain (Na<sup>+</sup>/K<sup>+</sup> pump blocker) or 4-aminopyridine (4-AP, voltage-gated K<sup>+</sup> channel blocker). In addition, we compared the membrane lipid composition of muscle tissue from warm- and cold-acclimated locust, and the abundance of a range transcripts related to ion transport and cell injury accumulation. We found that cold-acclimated locusts are depolarization resistant due to an elevated K<sup>+</sup> permeability, facilitated by opening of 4-AP sensitive K<sup>+</sup> channels. In accordance, cold-acclimation was associated with an increased abundance of <i>shaker</i> transcripts (gene encoding 4-AP sensitive voltage-gated K<sup>+</sup> channels). Furthermore, we found that cold-acclimation improved muscle cell viability following exposure to cold and hyperkalemia even when muscles were depolarized substantially. Thus, cold-acclimation confers resistance to depolarization by altering the relative ion permeability, but cold-acclimated locusts are also more tolerant to depolarization.</p>
Children's Health in London and Luton (CHILL)
ClinicalTrials.gov study NCT04695093. IPD Sharing: Not stated. Countries: 1. Publications: 1.
CHIlled Platelet Study "CHIPS"
ClinicalTrials.gov study NCT04834414. IPD Sharing: NO. Countries: 2. Publications: 5.
Functional variants of DOG1 control seed chilling responses and variation in seasonal life history strategies in Arabidopsis thaliana
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Data from: Chilling out: Cooler climates triggered divergence of Sabal (Arecaceae: Coryphoideae: Sabaleae) at the end of the mid-Miocene climatic optimum
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Data from: Anti-diuretic activity of a CAPA neuropeptide can compromise Drosophila chill tolerance
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Data from: Cold-acclimation increases depolarization resistance and tolerance in muscle fibers from a chill-susceptible insect, Locusta migratoria
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Data from: Germination timing and chilling exposure create contingency in life history and influence fitness in the native wildflower Streptanthus tortuosus
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Data from: Brassinosteroids act as a positive regulator of NBR1-dependent selective autophagy in response to chilling stress in tomato
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Figure 3 from: Carvalho F, Bôlla DAS, Mottin V, Kiem SZ, Zocche JJ, Passos FC (2020) Chilling to the bone: Lower temperatures increase vertebrate predation by Tonatia bidens (Chiroptera: Phyllostomidae). Zoologia 37: 1-5. https://doi.org/10.3897/zoologia.37.e37682
Figure 3 Relation of mean temperature (°C) per month and the number of records of invertebrate (black dots) and vertebrates (grey dots). Dashed line represents the vertebrate model.
Figure 2 from: Carvalho F, Bôlla DAS, Mottin V, Kiem SZ, Zocche JJ, Passos FC (2020) Chilling to the bone: Lower temperatures increase vertebrate predation by Tonatia bidens (Chiroptera: Phyllostomidae). Zoologia 37: 1-5. https://doi.org/10.3897/zoologia.37.e37682
Figure 2 Variation in the precipitation and average temperature from March to November 2013, obtained in a meteorological station, installed in the RNSM area, on the northern coast of Paraná state. Samplings were carried between March 2013 and July 2014.
Figure 1 from: Carvalho F, Bôlla DAS, Mottin V, Kiem SZ, Zocche JJ, Passos FC (2020) Chilling to the bone: Lower temperatures increase vertebrate predation by Tonatia bidens (Chiroptera: Phyllostomidae). Zoologia 37: 1-5. https://doi.org/10.3897/zoologia.37.e37682
Figure 1 Localization of Reserva Particular do Patrimônio Natural (RPPN) Salto Morato (black star) in the municipality of Guaraqueçaba, northern coast of Paraná state, southern Brazil.
Data from: Tree phenology responses to winter chilling, spring warming, at north and south range limits
Increases in primary production may occur if plants respond to climate warming with prolonged growing seasons, but not if local adaptation, cued by photoperiod, limits phenological advance. It has been hypothesized that trees with diffuse porous xylem anatomy and early successional species may respond most to warming. Within species, northern populations may respond most due to the fact that growing seasons are relatively short. Species most sensitive to spring temperature may show little overall response to warming if reduced chilling in fall/winter offsets accelerated winter/spring development. Because current thermal models consider only highly aggregated variables, e.g., degree days or chilling units (temperature sums for a season or year) they may not accurately represent warming effects. We show that assumptions contained in current thermal (degree-day) models are unrealistic for climate change analysis. Critical threshold parameters are not identifiable, and they do not actually have much to do with thresholds for development. Traditional models further overlook the discrete nature of observations, observation error, and the continuous response of phenological development to temperature variation. An alternative continuous development model (CDM) that addresses these problems is applied to a large experimental warming study near northern and southern boundaries of 15 species in the eastern deciduous forest of the US, in North Carolina and Massachusetts. Results provide a detailed time course of phenological development, including vernalization during winter and warming in spring, and challenge the basic assumptions of thermal models. Where traditional models find little evidence of a chilling effect (most are insignificant or have the wrong sign), the continuous development model finds evidence of chilling effects in most species. Contrary to the hypothesis that northern populations respond most, we find southern populations are most responsive. Because northern populations already have a compressed period for spring development they may lack flexibility to further advance development. A stronger response in the southern range could allow residents to resist northward migration of immigrants as climate warms. If potential invaders fail to exploit a prolonged growing season to the same degree as residents, then there is a resident advantage. Hypothesized effects of warming for xylem anatomy and successional status are not supported by the 15 species in this study.
Data from: Comparative transcriptome and lipidome analyses reveal molecular chilling responses in chilling-tolerant sorghums
Chilling temperatures (0 to 15°C) are a major constraint for temperate cultivation of tropical-origin crops, including the cereal crop sorghum (Sorghum bicolor [L.] Moench). Northern Chinese sorghums have adapted to early-season chilling, but molecular mechanisms of chilling tolerance are unknown. We used RNA sequencing of seedlings to compare the chilling-responsive transcriptomes of a chilling-tolerant Chinese accession with a chilling-sensitive US reference line, and mass spectrometry to compare chilling-responsive lipidomes of four chilling-tolerant Chinese accessions with two US reference lines. Comparative transcriptomics revealed chilling-induced up-regulation of cold-response regulator C-repeat binding factor (CBF) transcription factor and genes involved in reactive oxygen detoxification, jasmonic acid (JA) biosynthesis, and lipid remodeling phospholipase Dα1 (PLDα1) gene in the chilling-tolerant Chinese line. Lipidomics revealed conserved chilling-induced increases in lipid unsaturation, as well as lipid remodeling of photosynthetic membranes that is specific to chilling-tolerant Chinese accessions. Our results point to CBF-mediated transcriptional regulation, galactolipid and phospholipid remodeling, and JA as potential molecular mechanisms underlying chilling adaptation in Chinese sorghums. These molecular systems underlying chilling response could be targeted in molecular breeding for chilling tolerance.
Project Chill: Tailored Youth Drug Intervention In Primary Care
ClinicalTrials.gov study NCT01329315. IPD Sharing: Not stated. Countries: 0. Publications: 1.
Data from: Tree phenology responses to winter chilling, spring warming, at north and south range limits
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Data from: Concurrent effects of cold and hyperkalaemia cause insect chilling injury
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