63,050 results match your criteria heat stress


Evidence for efficient non-evaporative leaf-to-air heat dissipation in a pine forest under drought conditions.

New Phytol 2021 Sep 18. Epub 2021 Sep 18.

Earth & Planetary Sciences, Weizmann Institute of Science, 7610001, Rehovot, Israel.

Drier climates predicted for many regions result in reduced evaporative cooling leading to leaf heat stress and enhanced mortality. The extent to which non-evaporative cooling can contribute to plant resilience to the increasingly stressful conditions is poorly known at present. Using a novel, high accuracy infrared system for continuous measurements of leaf temperature in mature trees under field conditions, we assessed leaf-to-air temperature differences (ΔT ) of pine needles during drought. Read More

View Article and Full-Text PDF
September 2021

Constitutive expression and discovery of antimicrobial peptides in Zygogramma bicolorata (Coleoptera: Chrysomelidae).

Proteins 2021 Sep 18. Epub 2021 Sep 18.

Department of Biochemistry and Biochemical Engineering, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj, India.

The expression, identification, and discovery of less toxic antimicrobial peptides (AMPs) are significant in managing infectious pathogens. AMPs triggered in response to the immune system have evolved to defend against pathogens and wounding. The protein composition of Zygogramma bicolorata hemolymph is of diagnostic importance as the open circulatory systems of the insects involve signaling through hemolymph. Read More

View Article and Full-Text PDF
September 2021

Knockdown of NON-YELLOW COLORING 1 (NYC1)-like gene or chlorophyllin application enhanced chlorophyll accumulation with antioxidant roles in suppressing heat-induced leaf senescence in perennial ryegrass.

J Exp Bot 2021 Sep 18. Epub 2021 Sep 18.

Department of Plant Biology, Rutgers, the State University of New Jersey, New Brunswick, NJ, USA.

Loss of chlorophyll (Chl) and oxidative damages co-occur during heat-induced leaf senescence. This study aimed to determine the functions of Chl catabolic gene, NON-YELLOW COLORING 1 (NYC1)-like (NOL) in regulating heat-induced leaf senescence and to characterize antioxidant roles of a Chl derivative, sodium copper chlorophyllin (SCC), in suppressing heat-induced leaf senescence. In two separate experiments, one by comparing NOL RNAi transgenic and wild-type plants, and the other by analyzing the effects of sodium copper chlorophyllin (SCC, 1 mM) treatment, perennial ryegrass (Lolium perenne) were exposed to heat stress (38/35 oC, day/night) or optimal temperature (25/20 oC). Read More

View Article and Full-Text PDF
September 2021

Secretion of a low-molecular-weight species of endogenous GRP94 devoid of the KDEL motif during endoplasmic reticulum stress in Chinese hamster ovary cells.

Traffic 2021 Sep 18. Epub 2021 Sep 18.

Department of Biotechnology, Graduate School of Engineering.

GRP94 (glucose-regulated protein 94) is a well-studied chaperone with a KDEL (lysine, aspartic acid, glutamic acid, and leucine) motif at its C-terminal, which is responsible for GRP94 localization in the endoplasmic reticulum (ER). GRP94 is upregulated during ER stress to help fold unfolded proteins or direct proteins to ER-associated degradation. In a previous study, engineered GRP94 without the KDEL motif stimulated a powerful immune response in vaccine cells. Read More

View Article and Full-Text PDF
September 2021

Conformance of sowing dates for maximizing heat use efficiency and seed cotton yield in arid to semi-arid cotton zone of Pakistan.

Environ Sci Pollut Res Int 2021 Sep 18. Epub 2021 Sep 18.

Institute of Soil & Environmental Sciences, University of Agriculture, Faisalabad, Pakistan.

Pakistan is placed among the most vulnerable countries with relation to climate change and its impacts on agricultural productivity. Cotton is staged as the cash crop of the country and the main source of raw material for textile, oil, and feed industry. Varying environmental attributes have significant effects on the duration of vegetative and reproductive stages of cotton crop. Read More

View Article and Full-Text PDF
September 2021

Heat stress in macrofungi: effects and response mechanisms.

Appl Microbiol Biotechnol 2021 Sep 18. Epub 2021 Sep 18.

College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.

Temperature is one of the key factors that affects the growth and development of macrofungi. Heat stress not only negatively affects the morphology and growth rate of macrofungi, but also destroys cell structures and influences cell metabolism. Due to loosed structure of cell walls and increased membrane fluidity, which caused by heat stress, the outflow of intracellular nutrients makes macrofungi more vulnerable to invasion by pathogens. Read More

View Article and Full-Text PDF
September 2021

Expression studies of stress responsive genes in cotton Gossypium hirsutum L.

Mol Biol Rep 2021 Sep 17. Epub 2021 Sep 17.

Faculty of Agricultural Sciences and Technologies, Sivas University of Science and Technology, Sivas, Turkey.

Background: Cotton is the world's richest source of natural fiber. Meanwhile cotton plant is top ranked stress sensitive plant thereby affecting its yield and fiber quality. But, in climate change scenario, fiber yield and quality are being affected due to environmental stresses, especially heat, drought and salinity. Read More

View Article and Full-Text PDF
September 2021

Indentation-derived creep response of cast and laser powder bed fused AlSi10Mg alloy: Air temperature.

Micron 2021 Sep 14;150:103145. Epub 2021 Sep 14.

Micro/Nanomechanics Laboratory, Department of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, Toledo, OH, USA. Electronic address:

Compared with time-consuming conventional uniaxial tensile/compressive creep experiments, depth-sensing indentation testing is considered a reliable, and convenient testing technique to assess the time-dependent plastic deformation of materials in a reasonable time scale. In the present study, we report the ambient (room) temperature indentation creep properties of additively manufactured (i.e. Read More

View Article and Full-Text PDF
September 2021

Outdoor thermal stress changes in South Korea: Increasing inter-annual variability induced by different trends of heat and cold stresses.

Sci Total Environ 2021 Sep 4;805:150132. Epub 2021 Sep 4.

High Impact Weather Research Department, National Institute of Meteorological Sciences, South Korea. Electronic address:

Changes of thermal environment can lead to unfavorable impacts such as a decrease of thermal stratification, increase of energy consumption, and increase of thermal health risk. Investigating changes in outdoor thermal environments can provide meaningful information for addressing economic and social issues and related challenges. In this study, thermal environment changes in South Korea were investigated using a nonstationary two-component Gaussian mixture model (NSGMM) for air temperature and two thermal comfort indices. Read More

View Article and Full-Text PDF
September 2021

Better together: Cross-tolerance induced by warm acclimation and nitrate exposure improved the aerobic capacity and stress tolerance of common carp Cyprinus carpio.

Ecotoxicol Environ Saf 2021 Sep 14;225:112777. Epub 2021 Sep 14.

University of Antwerp, Department of Biology, Systemic Physiological and Ecotoxicological Research (SPHERE), Groenenborgerlaan 171, 2020 Antwerp, Belgium.

Climate warming is a threat of imminent concern that may exacerbate the impact of nitrate pollution on fish fitness. These stressors can individually affect the aerobic capacity and stress tolerance of fish. In combination, they may interact in unexpected ways where exposure to one stressor may heighten or reduce the resilience to another stressor and their interactive effects may not be uniform across species. Read More

View Article and Full-Text PDF
September 2021

Circulating heat shock protein 90 (Hsp90) and autoantibodies to Hsp90 are increased in patients with atopic dermatitis.

Cell Stress Chaperones 2021 Sep 16. Epub 2021 Sep 16.

Department of Molecular Biology, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, 80-308, Gdańsk, Poland.

Atopic dermatitis (AD) is one of the most common chronic inflammatory dermatoses characterized by persistent itching and recurrent eczematous lesions. While the primary events and key drivers of AD are topics of ongoing debate, cutaneous inflammation due to inappropriate IgE (auto)antibody-related immune reactions is frequently considered. Highly conserved and immunogenic heat shock protein 90 (Hsp90), a key intra- and extracellular chaperone, can activate the immune response driving the generation of circulating anti-Hsp90 autoantibodies that are found to be elevated in several autoimmune disorders. Read More

View Article and Full-Text PDF
September 2021

Daily vaginal temperature in Girolando cows from three different genetic composition under natural heat stress.

Transl Anim Sci 2021 Jul 26;5(3):txab138. Epub 2021 Aug 26.

Laboratório de Reprodução Animal, Embrapa Gado de Leite, Juiz de Fora, Brazil.

The present trial evaluated the effect of crossbred composition and Temperature and Humidity Index (THI) on vaginal temperature (VT) of Girolando dairy cows maintained under tropical pasture during warm seasons. The VT was monitored along 41 to 96 h in 615 Girolando cows with different Holstein (H) × Gir genetic composition (1/2 H = 284, 3/4 H = 248, and 7/8 H = 83) from six Brazilian farms in the summer of 2016 and 2017. VT of each cow at each hour of the day and the respective THI were averaged per hour across all monitoring days to generate an averaged value for VT and THI during 24 h. Read More

View Article and Full-Text PDF

The Role of Polyphenols in Regulation of Heat Shock Proteins and Gut Microbiota in Weaning Stress.

Oxid Med Cell Longev 2021 6;2021:6676444. Epub 2021 Sep 6.

Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125 Hunan, China.

Gut microbiota is the natural residents of the intestinal ecosystem which display multiple functions that provide beneficial effects on host physiology. Disturbances in gut microbiota in weaning stress are regulated by the immune system and oxidative stress-related protein pathways. Weaning stress also alters gut microbiota response, limits digestibility, and influences animal productive performance through the production of inflammatory molecules. Read More

View Article and Full-Text PDF
September 2021

Climate anomalies, land degradation and rural out-migration in Uganda.

Popul Environ 2020 Jun 30;41(4):507-528. Epub 2020 May 30.

UNC Department of Geography, 308 Carolina Hall, CB #3220, Chapel Hill, NC 27599.

Globally, rural livelihoods are increasingly challenged by the dual threats of land degradation and climate change. These issues are of particular concern in sub-Saharan Africa, where land degradation is believed to be severe and where climate change will bring higher temperatures and shifts in rainfall. To date, however, we know little about the relative effects of these various potential environmental stressors on migration. Read More

View Article and Full-Text PDF

Lipid flippases as key players in plant adaptation to their environment.

Nat Plants 2021 Sep 16;7(9):1188-1199. Epub 2021 Sep 16.

Department for Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, Denmark.

Lipid flippases (P4 ATPases) are active transporters that catalyse the translocation of lipids between the two sides of the biological membranes in the secretory pathway. This activity modulates biological membrane properties, contributes to vesicle formation, and is the trigger for lipid signalling events, which makes P4 ATPases essential for eukaryotic cell survival. Plant P4 ATPases (also known as aminophospholipid ATPases (ALAs)) are crucial for plant fertility and proper development, and are involved in key adaptive responses to biotic and abiotic stress, including chilling tolerance, heat adaptation, nutrient deficiency responses and pathogen defence. Read More

View Article and Full-Text PDF
September 2021

Changes in genetic parameters for milk yield and heat tolerance in the Thai Holstein crossbred dairy population under different heat stress levels and over time.

J Dairy Sci 2021 Sep 13. Epub 2021 Sep 13.

Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand; Network Center for Animal Breeding and Omics Research, Khon Kaen University, Khon Kaen 40002, Thailand. Electronic address:

The objectives of this study were to investigate changes in genetic parameters for milk yield (MY) and heat tolerance of the crossbred Thai Holstein Friesian population under different heat stress levels over time, and to investigate the threshold point of heat stress manifestation on milk production. Genetic parameters were estimated using single-step genomic REML (ssGREML) and traditional REML models. Data included 58,965 test-day MY records from 1999 to 2008 (old data) and 105,485 test-day MY records from 2009 to 2018 (recent data) from the first parity of 24,520 cows. Read More

View Article and Full-Text PDF
September 2021

HSF1 is involved in suppressing A1 phenotype conversion of astrocytes following spinal cord injury in rats.

J Neuroinflammation 2021 Sep 16;18(1):205. Epub 2021 Sep 16.

Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, 19 Qixiu Road, Nantong, 226001, People's Republic of China.

Background: Two activation states of reactive astrocytes termed A1 and A2 subtypes emerge at the lesion sites following spinal cord injury (SCI). A1 astrocytes are known to be neurotoxic that participate in neuropathogenesis, whereas A2 astrocytes have been assigned the neuroprotective activity. Heat shock transcription factor 1 (HSF1) plays roles in protecting cells from stress-induced apoptosis and in controlling inflammatory activation. Read More

View Article and Full-Text PDF
September 2021

Posttranslational modification and beyond: interplay between histone deacetylase 6 and heat-shock protein 90.

Mol Med 2021 Sep 16;27(1):110. Epub 2021 Sep 16.

College of Life Science and Technology, Guangzhou Jinan Biomedicine Research and Development Center, Jinan University, Guangzhou, China.

Posttranslational modification (PTM) and regulation of protein stability are crucial to various biological processes. Histone deacetylase 6 (HDAC6), a unique histone deacetylase with two functional catalytic domains (DD1 and DD2) and a ZnF-UBP domain (ubiquitin binding domain, BUZ), regulates a number of biological processes, including gene expression, cell motility, immune response, and the degradation of misfolded proteins. In addition to the deacetylation of histones, other nonhistone proteins have been identified as substrates for HDAC6. Read More

View Article and Full-Text PDF
September 2021

Cold Shock Response in Bacteria.

Annu Rev Genet 2021 Sep 16. Epub 2021 Sep 16.

Department of Microbiology and Immunology, University of California, San Francisco, California 94158, USA; email:

Bacteria often encounter temperature fluctuations in their natural habitats and must adapt to survive. The molecular response of bacteria to sudden temperature upshift or downshift is termed the heat shock response (HSR) or the cold shock response (CSR), respectively. Unlike the HSR, which activates a dedicated transcription factor that predominantly copes with heat-induced protein folding stress, the CSR is mediated by a diverse set of inputs. Read More

View Article and Full-Text PDF
September 2021

A novel missense mutation (rs464874590) within BoLA-DOB gene associated with the heat-resistance in Chinese cattle.

Gene 2021 Sep 13:145965. Epub 2021 Sep 13.

Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China. Electronic address:

Bovine leukocyte antigen, class II, DO beta (BoLA-DOB) is related to antigen presentation, which can triggered by multicul factors. And the condition of immune function determines how much cattle load to heat stress. To evaluate the relationship between heat-resistance and single nucleotide polymorphisms (SNPs) in BoLA-DOB gene, our study has taken further analysis in Chinese indigenous cattle for the first time. Read More

View Article and Full-Text PDF
September 2021

Encapsulation Strategies for Highly Stable Perovskite Solar Cells under Severe Stress Testing: Damp Heat, Freezing, and Outdoor Illumination Conditions.

ACS Appl Mater Interfaces 2021 Sep 16. Epub 2021 Sep 16.

Institute for Photovoltaics (ipv), University of Stuttgart, Pfaffenwaldring 47, Stuttgart D-70569, Germany.

A key direction toward managing extrinsic instabilities in perovskite solar cells (PSCs) is encapsulation. Thus, a suitable sealing layer is required for an efficient device encapsulation, preventing moisture and oxygen ingression into the perovskite layer. In this work, a solution-based, low-cost, and commercially available bilayer structure of poly(methyl methacrylate)/styrene-butadiene (PMMA/SB) is investigated for PSCs encapsulation. Read More

View Article and Full-Text PDF
September 2021

Impact of Successive Exertional Heat Injuries on Thermoregulatory and Systemic Inflammatory Responses in Mice.

J Appl Physiol (1985) 2021 Sep 16. Epub 2021 Sep 16.

Thermal and Mountain Medicine Division, grid.420094.bU.S. Army Research Institute of Environmental Medicine, Natick, Massachusetts, United States.

The purpose of the study was to determine if repeated exertional heat injuries (EHIs) worsen the inflammatory response and subsequent organ damage. We assessed the impact of a single EHI bout (EHI0) or 2 separate EHI episodes separated by 1 (EHI1), 3 (EHI3), and 7 (EHI7) days in male C57BL/6J mice (N = 236). To induce EHI, mice underwent a forced running protocol until loss of consciousness or core temperature reached ≥ 42. Read More

View Article and Full-Text PDF
September 2021

NIR-II Excitation Phototheranostic Nanomedicine for Fluorescence/Photoacoustic Tumor Imaging and Targeted Photothermal-Photonic Thermodynamic Therapy.

Small 2021 Sep 16:e2102527. Epub 2021 Sep 16.

State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing, 210023, China.

The success of phototheranostics is hampered by some intrinsic defects, such as limited light penetration depth, heat resistance of tumor cells to photothermal therapy (PTT) induced by heat shock protein (HSP) and stress resistance against photodynamic therapy (PDT) caused by hypoxia microenvironment of tumor. Herein, a second near infrared (NIR-II) light excitation phototheranostic nanomedicine has been fabricated by integrating the semiconducting polymer, azo compound, and HSP inhibitor into a thermosensitive liposome, followed by modification with targeting aptamer, forming Lip(PTQ/GA/AIPH) for multimodal phototheranostics of triple-negative breast cancer (TNBC). The phototheranostic nanomedicine provides tumor targeting NIR-II fluorescence and photoacoustic dual-modal imaging, as well as NIR-II PTT. Read More

View Article and Full-Text PDF
September 2021

Protein homeostasis, regulation of energy production and activation of DNA damage-repair pathways are involved in the heat stress response of Pseudogymnoascus spp.

Environ Microbiol 2021 Sep 16. Epub 2021 Sep 16.

Institute of Ocean and Earth Sciences, C308, Institute of Advanced Studies Building, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.

Proteome changes can be used as an instrument to measure the effects of climate change, predict the possible future state of an ecosystem and the direction in which is headed. In this study, proteomic and GO functional enrichment analysis of six Pseudogymnoascus spp. isolated from various global biogeographical regions were carried out to determine their response to heat stress. Read More

View Article and Full-Text PDF
September 2021

Plant Mitochondria - Past, present and future.

Plant J 2021 Sep 16. Epub 2021 Sep 16.

Department of Biology, Lund University, SE-22362, Lund, Sweden.

The study of plant mitochondria started in earnest around 1950 with the first isolations of mitochondria from animal and plant tissues. The first 35 years were spent establishing the basic properties of plant mitochondria and plant respiration using biochemical and physiological approaches. A number of unique properties (compared to mammalian mitochondria) were observed: (i) The ability to oxidize malate, glycine and cytosolic NAD(P)H at high rates. Read More

View Article and Full-Text PDF
September 2021

Heat Shock Protein 70 as a Sex-Skewed Regulator of α-Synucleinopathy.

Neurotherapeutics 2021 Sep 15. Epub 2021 Sep 15.

Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA, USA.

The role of molecular chaperones, such as heat shock protein 70 (Hsp70), is not typically studied as a function of biological sex, but by addressing this gap we might improve our understanding of proteinopathic disorders that predominate in one sex. Therefore, we exposed male or female primary hippocampal cultures to preformed α-synuclein fibrils in a model of early-stage Lewy pathology. We first discovered that two mechanistically distinct inhibitors of Hsp70 function increased phospho-α-synuclein inclusions more robustly in male-derived neurons. Read More

View Article and Full-Text PDF
September 2021

Enhanced intestinal permeability and intestinal co-morbidities in heat strain: A review and case for autodigestion.

Temperature (Austin) 2021 12;8(3):223-244. Epub 2021 Jul 12.

Department of Bioengineering, University of California San Diego, La Jolla, CA, USA.

Enhanced intestinal permeability is a pervasive issue in modern medicine, with implications demonstrably associated with significant health consequences such as sepsis, multiorgan failure, and death. Key issues involve the trigger mechanisms that could compromise intestinal integrity and increase local permeability allowing the passage of larger, potentially dangerous molecules. Heat stress, whether exertional or environmental, may modulate intestinal permeability and begs interesting questions in the context of global climate change, increasing population vulnerabilities, and public health. Read More

View Article and Full-Text PDF

Heat memory in plants: histone modifications, nucleosome positioning and miRNA accumulation alter heat memory gene expression.

Genes Genet Syst 2021 Sep 16. Epub 2021 Sep 16.

Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology.

Plant adaptation to high temperature, often referred to as heat acclimation, is a process in which exposure to moderately high temperatures increases a plant's tolerance to subsequent (normally) lethal high temperatures. Plants store heat experience information (heat memory) obtained from previous exposure to high temperatures for several days and develop future temperature responsiveness. However, our understanding of heat acclimation is very limited. Read More

View Article and Full-Text PDF
September 2021

Fecal glucocorticoid metabolites and ectoparasites as biomarkers of heat stress close to roads in a Mediterranean lizard.

Sci Total Environ 2021 Aug 26;802:149919. Epub 2021 Aug 26.

Road Ecology Lab, Department of Biodiversity, Ecology and Evolution, School of Biology, Complutense University of Madrid, Spain.

Differences between air and ground temperatures are expected to narrow with the advance of the season in temperate regions (aka seasonal restriction in the availability of thermal microhabitats), which may activate behavioral and physiological responses of ectotherm species adapted to temperate climates. However, according to cost-benefit models of ectotherm thermoregulation, we hypothesize that these responses may also carry some costs. We quantified seasonal shifts in thermoregulatory precision, concentration of fecal glucocorticoid metabolites, and load of ectoparasites in a Mediterranean lizard, Psammodromus algirus. Read More

View Article and Full-Text PDF

Increased fidelity of protein synthesis extends lifespan.

Cell Metab 2021 Sep 8. Epub 2021 Sep 8.

UCL Cancer Institute, Paul O'Gorman Building, University College London, 72 Huntley Street, London WC1E 6DD, UK; Department of Medical Physics and Biomedical Engineering, University College London, Malet Place Engineering Building, Gower Street, London WC1E 6BT, UK. Electronic address:

Loss of proteostasis is a fundamental process driving aging. Proteostasis is affected by the accuracy of translation, yet the physiological consequence of having fewer protein synthesis errors during multi-cellular organismal aging is poorly understood. Our phylogenetic analysis of RPS23, a key protein in the ribosomal decoding center, uncovered a lysine residue almost universally conserved across all domains of life, which is replaced by an arginine in a small number of hyperthermophilic archaea. Read More

View Article and Full-Text PDF
September 2021