292,008 results match your criteria abiotic stresses

A novel method to reduce false alarms in ECG diagnostic systems: capture and quantification of noisy signals.

Physiol Meas 2021 Apr 20. Epub 2021 Apr 20.

Soochow University, Suzhou, 215006, CHINA.

Objective: Muscle artifacts (MA) and electrode motion artifacts (EMA) in electrocardiogram (ECG) signals lead to a large number of false alarms from cardiac diagnostic systems. To reduce false alarms, it is necessary to improve the performance of the diagnostic algorithm in noisy environments by removing excessively noisy signals. However, existing methods focus on signal quality assessment and contain too many artificial features. Read More

View Article and Full-Text PDF

Factors modulating the behavioral and physiological stress responses: Do they modify the relationship between flight initiation distance and corticosterone reactivity?

Horm Behav 2021 Apr 17;132:104979. Epub 2021 Apr 17.

Swiss Ornithological Institute, CH-6204 Sempach, Switzerland. Electronic address:

Understanding how vulnerable species are to new stressors, such as anthropogenic changes, is crucial for mitigating their potential negative consequences. Many studies have investigated species sensitivity to human disturbance by focusing on single behavioral or physiological parameters, such as flight initiation distance and glucocorticoid levels. However, little is known about the differential effect that modulating factors might have on behavioral versus physiological stress responses across species. Read More

View Article and Full-Text PDF

Oxidative stress, DNA damage, and cellular response in hydrogen peroxide-induced cell injury of mud crab (Scylla paramamosain).

Fish Shellfish Immunol 2021 Apr 17. Epub 2021 Apr 17.

Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong, 510300, PR China. Electronic address:

Oxidative stress is considered as the toxicity mechanism of environmental stressors on aquatic organisms. This study aims to explore the effects of oxidative stress on physiological responses, DNA damage and transcriptional profiles of the mud crabs Scylla paramamosain. In the present study, mud crabs were injected with 0. Read More

View Article and Full-Text PDF

Integration of mRNA and miRNA analysis reveals the molecular mechanism of potato (Solanum tuberosum L.) response to alkali stress.

Int J Biol Macromol 2021 Apr 17. Epub 2021 Apr 17.

College of Horticulture, Gansu Agricultural University, Lanzhou 730070, China; Gansu Provincial Key Laboratory of Aridland Crop Science, Lanzhou 730070, China. Electronic address:

The continuing increase in the global saline-alkali land area has made saline-alkali stress the principal abiotic stress limiting plant growth. Potato is the most important non-grain crop, and its production is also severely limited by saline-alkali stress. However, few studies have addressed the mechanism of saline-alkali tolerance of potato with a focus on its response to neutral salt NaCl stress, or its response to alkali stress. Read More

View Article and Full-Text PDF

Mechanisms of Doxorubicin-Mediated Reproductive Toxicity - A Review.

Reprod Toxicol 2021 Apr 17. Epub 2021 Apr 17.

Centre for Cardiovascular and Adverse Drug Reactions, Department of Biotechnology, School of Bio and Chemical Engineering, Kalasalingam Academy of Research and Education, Krishnankoil, Tamil Nadu, PIN 626126, India. Electronic address:

The anticancer drug Doxorubicin has been associated with several adverse side-effects including reproductive toxicity in both genders. The current review has complied the mechanisms of doxorubicin induced reproductive toxicity. The articles cited in the review were searched using Google Scholar, PubMed, Scopus, Science Direct. Read More

View Article and Full-Text PDF

A Novel Lens for Cell Volume Regulation: Liquid-Liquid Phase Separation.

Cell Physiol Biochem 2021 Apr;55(S1):135-160

Laboratory of Cell Signaling, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan,

Cells are constantly exposed to the risk of volume perturbation under physiological conditions. The increase or decrease in cell volume accompanies intracellular changes in cell membrane tension, ionic strength/concentration and macromolecular crowding. To avoid deleterious consequences caused by cell volume perturbation, cells have volume recovery systems that regulate osmotic water flow by transporting ions and organic osmolytes across the cell membrane. Read More

View Article and Full-Text PDF

Identification, methylation profiling, and expression analysis of stress-responsive cytochrome P450 genes in rice under abiotic and phytohormones stresses.

GM Crops Food 2021 Apr 20:1-13. Epub 2021 Apr 20.

College of Economics and Management, Kunming University, Kunming China.

The cytochrome P450 (CYP) is a large and complex eukaryotic gene superfamily with enzymatic activities involved in several physiological and regulatory processes. As an objective, an genome-wide DNA methylation (5mC) analysis was performed in rice ( cv. Zhonghua11), and the epigenetic role of CYPs in two abiotic stresses was observed. Read More

View Article and Full-Text PDF

Unravelling physiological signatures of tomato bacterial wilt and xylem metabolites exploited by Ralstonia solanacearum.

Environ Microbiol 2021 Apr 19. Epub 2021 Apr 19.

LIPM, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan, France.

The plant pathogen Ralstonia solanacearum uses plant resources to intensely proliferate in xylem vessels and provoke plant wilting. We combined automatic phenotyping and tissue/xylem quantitative metabolomics of infected tomato plants to decipher the dynamics of bacterial wilt. Daily acquisition of physiological parameters such as transpiration and growth were performed. Read More

View Article and Full-Text PDF

Electrochemical measurements reveal reactive oxygen species in stress granules.

Angew Chem Int Ed Engl 2021 Apr 19. Epub 2021 Apr 19.

Chalmers Institute of Technology, Chemical and Biological Engineering, Kemivägen 10, 41296, Göteborg, SWEDEN.

Stress granules (SGs) are membrane-less organelles that assemble in the cytoplasm to organize cellular contents and promote rapid adaptation during stress. To understand how SGs contribute to physiological functions, we used electrochemical measurements to detect electroactive species in SGs. With amperometry, we discovered that reactive oxygen species (ROS) are encapsulated inside arsenite-induced SGs, and H 2 O 2 is the main species. Read More

View Article and Full-Text PDF

Genome-wide identification of the GATA transcription factor family and their expression patterns under temperature and salt stress in Aspergillus oryzae.

AMB Express 2021 Apr 19;11(1):56. Epub 2021 Apr 19.

Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-Vitro Diagnostic Reagents and Devices of Jiangxi Province, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang, 330013, China.

GATA transcription factors (TFs) are involved in the regulation of growth processes and various environmental stresses. Although GATA TFs involved in abiotic stress in plants and some fungi have been analyzed, information regarding GATA TFs in Aspergillus oryzae is extremely poor. In this study, we identified and functionally characterized seven GATA proteins from A. Read More

View Article and Full-Text PDF

Salt-induced recruitment of specific root-associated bacterial consortium capable of enhancing plant adaptability to salt stress.

ISME J 2021 Apr 19. Epub 2021 Apr 19.

Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, College of Horticulture, China Agricultural University, Beijing, P. R. China.

Salinity is a major abiotic stress threatening crop production. Root-derived bacteria (RDB) are hypothesized to play a role in enhancing plant adaptability to various stresses. However, it is still unclear whether and how plants build up specific RDB when challenged by salinity. Read More

View Article and Full-Text PDF

A 15-Minute Yoga Intervention to Reduce Entry-Level Dental Hygiene Student Stress.

J Dent Hyg 2021 Apr;95(2):63-70

Professor emeritus in the Department of Education; all at Idaho State University, Pocatello, ID, USA.

Health science students have an increased source of stress due to the rigorous curriculum, high clinical expectations, and academic demands. The purpose of this study was to determine the effectiveness of a 15-minute yoga intervention to reduce stress in entry-level dental hygiene students. First year dental hygiene students were invited to participate in the experimental study (n=32) and were randomly assigned to either the experimental or control group. Read More

View Article and Full-Text PDF

Walking Training Improves Systemic and Local Pathophysiological Processes in Intermittent Claudication.

Eur J Vasc Endovasc Surg 2021 Apr 16. Epub 2021 Apr 16.

School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil.

Objective: This study examined the impact of submaximal walking training (WT) on local and systemic nitric oxide (NO) bioavailability, inflammation, and oxidative stress in patients with intermittent claudication (IC).

Methods: The study employed a randomised, controlled, parallel group design and was performed in a single centre. Thirty-two men with IC were randomly allocated to two groups: WT (n = 16, two sessions/week, 15 cycles of two minutes walking at an intensity corresponding to the heart rate obtained at the pain threshold interspersed by two minutes of upright rest) and control (CO, n = 16, two sessions/week, 30 minutes of stretching). Read More

View Article and Full-Text PDF

Oxidative Stress Induced Cytotoxicity of Colloidal Copper Nanoparticles on RAW 264.7 Macrophage Cell Line.

J Nanosci Nanotechnol 2021 Oct;21(10):5066-5074

School of Physics and Materials Science, Thapar Institute of Engineering and Technology, Patiala 147004, India.

Copper is an essential trace mineral that plays an important role in various physiological processes of human body and also possesses excellent antimicrobial properties, however its high dose results in the formation of free-radicals, which can induce cytotoxicity through chromosomal and DNA damage. Therefore, cytotoxicity of colloidal copper nanoparticles (CuNPs) on murine macrophage cell line (RAW 264.7) was studied to understand the correlation between the cytotoxicity and the nanoparticle yield. Read More

View Article and Full-Text PDF
October 2021

Physiological and Cognitive Performance in F-22 Pilots During Day and Night Flying.

Aerosp Med Hum Perform 2021 May;92(5):303-311

Many workers routinely transition between day and night shiftsincluding pilots, where night flights are commonly considered more stressful. The physiological toll from this transition is not fully understood, though fatigue is a factor in many aviation accidents. This research investigated the changes in physiological markers of stress and cognitive performance as F-22 pilots transitioned from day flying to night flying. Read More

View Article and Full-Text PDF

Response of radish to multiple stresses: I. Physiological and growth responses to changes in ozone and nitrogen.

New Phytol 1990 Jul;115(3):439-446

Department of Biological Sciences, Stanford University, Stanford, CA 94305-2493 USA.

Experiments were conducted to determine the impact of nitrogen and ozone (O ) stress on the growth of domestic radish Raphanus sativus L. cv. Cherry Belle. Read More

View Article and Full-Text PDF

Ecophysiology of xerophytic and halophytic vegetation of a coastal alluvial plain in northern Venezuela: IV. Tillandsia flexuosa Sw. and Schomburgkia humboldtiana Reichb., epiphytic CAM plants.

New Phytol 1989 Feb;111(2):273-282

Institut für Botanik, Technische Hochschule Darmstadt, D-6100 Darmstadt, FRG.

A comparison of the performance of two epiphytes with crassulacean acid metabolism (CAM) was made during the rainy season and dry season at the Ciénega el Ostional, Chichiriviche in northern Venezuela. The epiphytic bromeliad, Tillandsia flexuosa has water-retaining tanks and leaf trichomes, and propagates mainly vegetatively to produce large populations in the shrubby island vegetation. The epiphytic orchid, Schomburgkia humboldtiana formed smaller populations, and had large succulent leaves with uniform chlorenchyma and no distinct water-storage parenchyma, unlike T. Read More

View Article and Full-Text PDF
February 1989

Characterization of environmental stress responses during early development of Pringlea antiscorbutica in the field at Kerguelen.

New Phytol 2004 Jun;162(3):705-715

Centre National de la Recherche Scientifique, Université de Rennes 1, Umr 6553 Ecobio, Campus de Beaulieu, bâtiment 14A, F-35042 Rennes Cedex, France.

•  Early development of Kerguelen cabbage (Pringlea antiscorbutica) was studied in the Kerguelen archipelago, its natural habitat, and under laboratory conditions. Polyamines, which are involved in developmental processes and responses to stress in several plant species, were used as markers of physiological status of P. antiscorbutica seedlings. Read More

View Article and Full-Text PDF

Gene-specific expression and calcium activation of Arabidopsis thaliana phospholipase C isoforms.

New Phytol 2004 Jun;162(3):643-654

Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, UK.

•  PI-PLCs synthesise the calcium releasing second messenger IP . We investigated the expression patterns of the Arabidopsis PI-PLC gene family and measured in vitro activity of encoded enzymes. •  Gene specific RT-PCR and promoter-GUS fusions were used to analyse AtPLC gene expression patterns. Read More

View Article and Full-Text PDF

Plant responses to simultaneous stress of waterlogging and shade: amplified or hierarchical effects?

New Phytol 2003 Feb;157(2):281-290

Netherlands Institute of Ecology, PO Box 40, 6666 ZG Heteren, the Netherlands.

• Community ecologists often assume a hierarchy of environmental sieves to predict the impact of multiple stresses on species distribution. We tested whether this assumption corresponds to physiological responses using impact of water level and shade in wetland vegetation as a model. • Seedlings of four wetland species were grown under full light and simulated canopy shade, both in drained and waterlogged soils. Read More

View Article and Full-Text PDF
February 2003

Poikilohydry and homoihydry: antithesis or spectrum of possibilities?

New Phytol 2002 Dec;156(3):327-349

Department of Botany and Plant Physiology and Departmental Research Group of Hungarian Academy of Sciences, Faculty of Agricultural and Environmental Sciences, Szent István University, H-2103 Gödöllõ, Páter K. u. 1., Hungary.

Plants have followed two principal (and contrasting) strategies of adaptation to the irregular supply of water on land, which are closely bound up with scale. Vascular plants evolved internal transport from the soil to the leafy canopy (but their 'homoihydry' is far from absolute, and some are desiccation tolerant (DT)). Bryophytes depended on desiccation tolerance, suspending metabolism when water was not available; their cells are generally either fully turgid or desiccated. Read More

View Article and Full-Text PDF
December 2002

Vernalization response of wild chickpea.

New Phytol 2002 Jun;154(3):695-701

Department of Plant Sciences, The University of Western Australia, Nedlands, WA 6907, Australia.

• Response to low temperature during early growth in cultivated chickpea (Cicer arietinum) and its wild progenitor C. reticulatum was investigated to clarify the evolutionary processes under domestication in this crop. • Parental lines and their F and F progeny were exposed to cold treatment (4°C) for 30°d after seed imbibition and compared with controls. Read More

View Article and Full-Text PDF

Identification of drought-sensitive beech ecotypes by physiological parameters.

New Phytol 2002 May;154(2):373-387

Institut für Forstbotanik und Baumphysiologie, Professur für Baumphysiologie, Georges-Köhler-Allee Geb. 053/054, D-79110 Freiburg im Breisgau, Germany.

•  The effects of drought on European beech (Fagus sylvatica) were assessed in a pot experiment under controlled conditions. •  Plants from 11 autochthonous provenances originating from regions in Germany, which differed in annual precipitation, were exposed to a 3-wk drought period in a glasshouse after the first stage of shoot growth had been completed. •  Drought reduced the water content to 97% of control in leaves and axes and to 92% in the roots. Read More

View Article and Full-Text PDF

Phosphorus acquisition and use: critical adaptations by plants for securing a nonrenewable resource.

New Phytol 2003 Mar;157(3):423-447

Soil, Water and Climate, University of Minnesota 1991 Upper Buford Circle, St Paul, MN 55108, USA.

Phosphorus (P) is limiting for crop yield on > 30% of the world's arable land and, by some estimates, world resources of inexpensive P may be depleted by 2050. Improvement of P acquisition and use by plants is critical for economic, humanitarian and environmental reasons. Plants have evolved a diverse array of strategies to obtain adequate P under limiting conditions, including modifications to root architecture, carbon metabolism and membrane structure, exudation of low molecular weight organic acids, protons and enzymes, and enhanced expression of the numerous genes involved in low-P adaptation. Read More

View Article and Full-Text PDF

MAP kinase signal transduction pathways in plants.

Peter C Morris

New Phytol 2001 Jul;151(1):67-89

Heriot-Watt University, Department of Biological Sciences, Riccarton, Edinburgh, EH14 4AS.

The mitogen-activated protein kinase (MAP kinase) signal transduction cascades are routes through which eukaryotic cells deliver extracellular messages to the cytosol and nucleus. These signalling pathways direct cell division, cellular differentiation, metabolism, and both biotic and abiotic stress responses. In plants, MAP kinases and the upstream components of the cascades are represented by multigene families, organized into different pathways which are stimulated and interact in complex ways. Read More

View Article and Full-Text PDF

Role of dynamics of intracellular calcium in aluminium-toxicity syndrome.

Z Rengel W-H Zhang

New Phytol 2003 Aug;159(2):295-314

Department of Horticulture, Viticulture & Oenology, Waite Campus, Adelaide University, PMB #1, Glen Osmond SA 5064, Australia.

This review is concentrating on the role of aluminium (Al)-calcium (Ca) interactions in Al toxicity syndrome in plants. Disruption of cytoplasmic Ca homeostasis has been suggested as a primary trigger of Al toxicity. Aluminium causes an increase in cytosolic Ca activity, potentially disrupting numerous biochemical and physiological processes, including those involved in the root growth. Read More

View Article and Full-Text PDF

Water stress and Sphaeropsissapinea as a latent pathogen of red pine seedlings.

New Phytol 2001 Mar;149(3):531-538

Department of Forest Ecology and Management, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706-1598, USA.

•  The role of water stress in the initiation of collar rot by Sphaeropsis sapinea in asymptomatically colonized Pinus resinosa seedlings is reported. • Mortality and frequency of identification of the pathogen was quantified for seedlings subjected to different water regimes or watering regime-fungicide (benomyl) combinations in glasshouse experiments. •  In experiment 1, seedling mortality ranged from 8% of repeatedly watered seedlings to 50% of those in the driest regime; data analysis indicated a high probability that mortality was not independent of watering regime. Read More

View Article and Full-Text PDF

Autonomic and Perceptual Responses to Induction of a Ketogenic Diet in Free-Living Endurance Athletes: A Randomized, Crossover Trial.

Int J Sports Physiol Perform 2021 Apr 19:1-7. Epub 2021 Apr 19.

Purpose: Considerable interindividual heterogeneity has been observed in endurance performance responses following induction of a ketogenic diet (KD). It is plausible that a physiological stress response in the period following the dramatic dietary shift associated with transition to a KD may explain this heterogeneity.

Methods: In a randomized, crossover study design, 8 trained male runners completed an incremental exercise test and ran to exhaustion at 70%VO2max before and after a 31-day rigorously controlled habitual diet or KD intervention, and recorded heart rate variability (root mean square of the sum of successive differences in R-R intervals [rMSSD]) upon waking each morning along with the recovery-stress questionnaire for athletes each week. Read More

View Article and Full-Text PDF

Stress effects on the oddball P300 and N2 in males and females.

Biol Psychol 2021 Apr 16:108095. Epub 2021 Apr 16.

Department of Biological and Clinical Psychology, University of Trier, Germany.

We examined the effect of psychosocial stress on electrophysiological markers of novelty and deviance processing, the N2 and P300, as well as sex differences therein. Participants underwent the Trier Social Stress Test (TSST) or a control procedure, followed by an oddball paradigm. A physiological stress response was induced in both sexes in the TSST condition. Read More

View Article and Full-Text PDF

Impact of physical activity on mitochondrial enzymes, muscle stem cell and anti-oxidant protein Sestrins in Sarcopenic mice.

Exp Gerontol 2021 Apr 16:111358. Epub 2021 Apr 16.

Department of Geriatric Medicine, All India Institute of Medical Sciences, New Delhi, India. Electronic address:

Introduction: Sarcopenia is the loss of skeletal muscle mass and function. It is a major health issue in old age due to lack of understanding of the origin and molecular mechanism. Altered dietary pattern, sedentary lifestyle and physical inactivity have shown adverse effect of skeletal muscle function. Read More

View Article and Full-Text PDF