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222 results for “Stress Resistance”
Fig. 2. DAMs between XL in Comparative metabolomics analysis of the response to cold stress of resistant and susceptible Tibetan hulless barley (Hordeum distichon)
Fig. 2. DAMs between XL and ZQ. (A) Numbers of DAMs under cold stress (12 °C, 5 °C, 0 °C, −5 °C, −8 °C) or the control condition (24 °C) in XL and ZQ. 1/2/3/4/5/ 6 represent 24 °C/12 °C/5 °C/0 °C/–5 °C/–8 °C, respectively.(B) Upregulated and downregulated metabolites in XL and ZQ at different temperatures. 1/2/3/4/5/6 represent 24 °C/12 °C/5 °C/0 °C/–5 °C/–8 °C, respectively. (C, D) Metabolites that were significantly altered in XL exposed to cold stress (12 °C, 5 °C, 0 °C) compared to the control condition (24 °C), but not in ZQ.
Cell Signaling and Resistance to Oxidative Stress: Effects of Aging and Exercise
ClinicalTrials.gov study NCT03419988. IPD Sharing: NO. Countries: 1. Publications: 1.
Use of Electroconvulsive Therapy (ECT) in Chronic, Severe, Treatment Resistant Posttraumatic Stress Disorder
ClinicalTrials.gov study NCT00739856. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Comparing the Effects of Aerobic & Resistance Exercises and Vitamins D & E on Oxidative Stress & Inflammatory Markers Among Patients with Depression
ClinicalTrials.gov study NCT06775548. IPD Sharing: NO. Countries: 1. Publications: 28.
Efficacy of Yoga for Treatment-Resistant Posttraumatic Stress Disorder
ClinicalTrials.gov study NCT00839813. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Skeletal Muscle Wasting and Insulin Resistance Following Surgical Stress
ClinicalTrials.gov study NCT01134809. IPD Sharing: Not stated. Countries: 1. Publications: 2.
The Effect of the 3/7 vs 3X9 Method in Resistance Training on Metabolic Stress in Cardiac Rehabilitation
ClinicalTrials.gov study NCT05391620. IPD Sharing: NO. Countries: 1. Publications: 1.
Human Mitochondrial Stress-driven Obesity Resistance
ClinicalTrials.gov study NCT06080568. IPD Sharing: NO. Countries: 1. Publications: 5.
Data from: Male stress response is related to ornamentation but not resistance to oxidative stress in a warbler
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Data from: Loss of heterosis and family-dependent inbreeding depression in plant performance and resistance against multiple herbivores under drought stress
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Data from: Inbreeding-related trade-offs in stress-resistance in the ant Formica exsecta
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Dataset - A complex network of additive and epistatic quantitative trait loci underlies natural variation of Arabidopsis thaliana quantitative disease resistance to Ralstonia solanacearum under heat stress
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Data from: Heritability, environmental effects, and genetic and phenotypic correlations of oxidative stress resistance-related enzyme activities during early life stages in Atlantic salmon
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Topography strongly affects drought stress and xylem embolism resistance in woody plants from a karst forest in Southwest China
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Data from: Predictability rather than amplitude of temperature fluctuations determines stress resistance in a natural population of Drosophila simulans
The adaptability of organisms to novel environmental conditions depends on the amount of genetic variance present in the population as well as on the ability of individuals to adjust their phenotype through phenotypic plasticity. Here, we investigated the phenotypic plasticity induced by a single generation's exposure to three different temperature regimes with respect to several life-history and stress-resistance traits in a natural population of Drosophila simulans. We studied a constant as well as a predictably and an unpredictably fluctuating temperature regime. We found high levels of phenotypic plasticity among all temperature regimes, suggesting a strong influence of both temperature fluctuations and their predictability. Increased heat tolerance was observed for flies developed in both types of fluctuating thermal environments compared with flies developed in a constant environment. We suggest that this was due to beneficial hardening when developing in either fluctuating temperature environment. To our surprise, flies that developed in constant and predictably changing environments were similar to each other in most traits when compared to flies from the unpredictably fluctuating environment. The unpredictably changing thermal environment imposed the most stressful condition, resulting in the lowest performance for stress-related traits, even though the absolute temperature changes never exceeded that of the predictably fluctuating environment. The overall decreased stress resistance of flies in the unpredictably fluctuating environment may be the consequence of maladaptive phenotypic plasticity in this setting, indicating that the adaptive value of plasticity depends on the predictability of the environment.
Data from: A trade-off between oxidative stress resistance and DNA repair plays a role in the evolution of elevated mutation rates in bacteria
The dominant paradigm for the evolution of mutator alleles in bacterial populations is that they spread by indirect selection for linked beneficial mutations when bacteria are poorly adapted. In this paper, we challenge the ubiquity of this paradigm by demonstrating that a clinically important stressor, hydrogen peroxide, generates direct selection for an elevated mutation rate in the pathogenic bacterium Pseudomonas aeruginosa as a consequence of a trade-off between the fidelity of DNA repair and hydrogen peroxide resistance. We demonstrate that the biochemical mechanism underlying this trade-off in the case of mutS is the elevated secretion of catalase by the mutator strain. Our results provide the first experimental evidence that direct selection can favour mutator alleles in bacterial populations, and pave the way for future studies to understand how mutation and DNA repair are linked to stress responses and how this impacts the evolution of bacterial mutation rates.
Data from: Evolution of pre- and post-copulatory traits in male Drosophila melanogaster as a correlated response to selection for resistance to cold stress
Background: In Drosophila melanogaster the fitness of males depends on a broad array of reproductive traits classified as pre- and post-copulatory traits. Exposure to cold stress, can reduce sperm number, male mating ability and courtship behavior. Therefore, it is expected that the adaptation to cold stress will involve changes in pre- and post-copulatory traits. Such evolution of reproductive traits in response to cold stress is not well studied. Methods: We selected replicate populations of D. melanogaster for resistance to cold shock. Over 37–46 generations of selection, we investigated pre- and post-copulatory traits such as mating latency, copulation duration, mating frequency, male fertility, fitness (progeny production) and sperm competitive ability in male flies subjected to cold shock and those not subjected to cold shock. Results: We found that post cold shock, the males from the selected populations had a significantly lower mating latency along with, higher mating frequency, fertility, sperm competitive ability and number of progeny relative to the control populations. Conclusion: While most studies of experimental evolution of cold stress resistance have documented the evolution of survivorship in response to selection, our study clearly shows that adaptation to cold stress involves rapid changes in the pre- and post-copulatory traits. Additionally, improved performances under stressful conditions need not necessarily trade-off with performance under benign conditions.
Data from: Do parasites and antioxidant availability affect begging behaviour, growth rate and resistance to oxidative stress?
Early-life trade-offs faced by developing offspring can have long-term consequences for their future fitness. Young offspring use begging displays to solicit resources from their parents and have been selected to grow fast to maximize survival. However, growth and begging behaviour are generally traded-off against self-maintenance. Oxidative stress, a physiological mediator of life-history trade-offs, may play a major role in this trade-off by constraining, or being costly to, growth and begging behaviour. Yet, despite implications for the evolution of life-history strategies and parent-offspring conflicts, the interplay between growth, begging behaviour and resistance to oxidative stress remains to be investigated. We experimentally challenged wild great tit (Parus major) offspring by infesting nests with a common ectoparasite, the hen flea (Ceratophyllus gallinae), and simultaneously tested for compensating effects of increased vitamin E availability, a common dietary antioxidant. We further quantified the experimental treatment effects on offspring growth, begging intensity and oxidative stress. Flea-infested nestlings of both sexes showed reduced body mass during the first half of the nestling phase but this effect vanished short before fledging. Begging intensity and oxidative stress of both sexes were unaffected by both experimental treatments. Feeding rates were not affected by the experimental treatments but parents of flea-infested nests fed nestlings with a higher proportion of caterpillars, the main source of antioxidants. Additionally, female nestlings begged significantly less than males in control nests, while both sexes begged at similar rates in vitamin E supplemented nests. Our study shows that a parasite exposure does not necessarily affect oxidative stress levels or begging intensity, but suggests that parents can compensate for negative effects of parasitism by modifying food composition. Furthermore, our results indicate that the begging capacity of the less competitive sex is constrained by antioxidant availability.
Data from: Effects of an early-life paraquat exposure on adult resistance to oxidative stress, plumage colour and sperm performance in a wild bird
1. Early-life stressful conditions can shape individual phenotypes and ultimately influence fitness. Oxidative stress is a pervasive threat that affects many fitness-related traits and can modulate life-history trade-offs. Yet, the extent to which exposure to oxidative stress during early life can have long-lasting effects on key fitness-related traits remains to be elucidated, particularly in natural populations of vertebrates. 2. Using a wild population of great tits Parus major, we experimentally dosed 11 day-old birds with paraquat, a pro-oxidant molecule, aiming at increasing oxidative stress. One year later, we recaptured 39 of them as adult recruiting breeders and quantified effects of the paraquat exposure on their resistance to oxidative stress, carotenoid-based plumage colouration and male sperm performance. 3. Despite the absence of a short-term effect of paraquat on oxidative stress measured two days later, the pre-fledging exposure to paraquat induced a reduction in individual oxidative damage measured at adulthood. Paraquat-dosed individuals also had brighter plumage, but no effect was observed on male sperm performance. 4. For the first time in a natural population of vertebrates, we experimentally show that an early-life acute exposure to a pro-oxidant has long-lasting effects on individual resistance to oxidative stress at adulthood. Our results are in line with the environmental matching and the hormesis hypotheses but may also reflect selective disappearance of individuals with lower resistance to oxidative stress.
Dataset to - "Evaluation of agronomic efficiency and stress resistance on Swiss chard via use of biostimulants"
<p>This is the datasent to the published manuscript titled - "Evaluation of agronomic efficiency and stress resistance on Swiss chard via use of biostimulants". DOI: https://doi.org/10.1016/j.scienta.2024.113053</p> <p>1) The attached file contains the raw and calculated dataset for biomass, nitrogen uptake, nitrogen fertiliser replacement value, nitrogen use efficiency, chlorophyll, proline, MDA and other agronomic data related to the swiss chard pot trials from the different bio-based fertilisers under Belgian pilot plant.</p> <p> </p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
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