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https://www.readbyqxmd.com/read/29222468/dissecting-the-genetic-basis-of-local-adaptation-in-soybean
#1
Nonoy B Bandillo, Justin E Anderson, Michael B Kantar, Robert M Stupar, James E Specht, George L Graef, Aaron J Lorenz
Soybean (Glycine max) is the most widely grown oilseed in the world and is an important source of protein for both humans and livestock. Soybean is widely adapted to both temperate and tropical regions, but a changing climate demands a better understanding of adaptation to specific environmental conditions. Here, we explore genetic variation in a collection of 3,012 georeferenced, locally adapted landraces from a broad geographical range to help elucidate the genetic basis of local adaptation. We used geographic origin, environmental data and dense genome-wide SNP data to perform an environmental association analysis and discover loci displaying steep gradients in allele frequency across geographical distance and between landrace and modern cultivars...
December 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29221079/quantitative-analysis-for-the-effect-of-the-thermal-physical-property-parameter-of-adhesive-on-the-thermal-performance-of-the-quadrupolar-fiber-coil
#2
Zhuo Zhang, Fei Yu
As a high-precision angular sensor, the fiber optic gyroscope (FOG) usually shows high sensitivity to disturbances of the environmental temperature. The thermal performance of the FOG will be directly affected by the selection of adhesive for adhesion inside the fiber coil, however, the current research on this is very rare. This paper is focusing the question above; firstly, the influence mechanism of temperature and stress on the non-reciprocity phase difference of the fiber coil is analyzed, and a model of fiber coil thermal-induced drift error is built...
November 27, 2017: Optics Express
https://www.readbyqxmd.com/read/29221034/inp-based-photonic-integrated-circuit-platform-on-sic-wafer
#3
Mitsuru Takenaka, Shinichi Takagi
We have numerically investigated the properties of an InP-on-SiC wafer as a photonic integrated circuit (PIC) platform. By bonding a thin InP-based semiconductor on a SiC wafer, SiC can be used as waveguide cladding, a heat sink, and a support substrate simultaneously. Since the refractive index of SiC is sufficiently low, PICs can be fabricated using InP-based strip and rib waveguides with a minimum bend radius of approximately 7 μm. High-thermal-conductivity SiC underneath an InP-based waveguide core markedly improves heat dissipation, resulting in superior thermal properties of active devices such as laser diodes...
November 27, 2017: Optics Express
https://www.readbyqxmd.com/read/29220364/an-attempt-to-interpret-a-biochemical-mechanism-of-c4-photosynthetic-thermo-tolerance-under-sudden-heat-shock-on-detached-leaf-in-elevated-co2-grown-maize
#4
Mingnan Qu, James A Bunce, Richard C Sicher, Xiaocen Zhu, Bo Gao, Genyun Chen
Detached leaves at top canopy structures always experience higher solar irradiance and leaf temperature under natural conditions. The ability of tolerance to high temperature represents thermotolerance potential of whole-plants, but was less of concern. In this study, we used a heat-tolerant (B76) and a heat-susceptible (B106) maize inbred line to assess the possible mitigation of sudden heat shock (SHS) effects on photosynthesis (PN) and C4 assimilation pathway by elevated [CO2]. Two maize lines were grown in field-based open top chambers (OTCs) at ambient and elevated (+180 ppm) [CO2]...
2017: PloS One
https://www.readbyqxmd.com/read/29219022/effectiveness-of-radiofrequency-hyperthermia-for-treating-cartilage-in-guinea-pigs-with-primary-osteoarthritis
#5
Kenji Takahashi, Hiroshi Nakamura, Hitoshi Ozawa, Sanshiro Hashimoto, Norio Iijima, Shimpei Higo, Hiroshi Watanabe, Yusuke Mochizuki, Shinro Takai
Objective Autophagy was reported to be essential for maintaining chondrocyte function, and reduced autophagy leads to osteoarthritis (OA). Previous studies showed involvement of heat shock stress in the control of autophagy in cells. This study sought to investigate the effect of hyperthermia on the expression of autophagy-related proteins in articular cartilage and the progression of naturally occurring OA in Hartley guinea pigs. Design Radiofrequency pulses of 13.56 MHz were applied to the animals' knees for 20 minutes to induce hyperthermia...
January 2018: Cartilage
https://www.readbyqxmd.com/read/29218733/a-gene-driven-recovery-mechanism-drosophila-larvae-increase-feeding-activity-for-post-stress-weight-recovery
#6
Masasuke Ryuda, Miku Tabuchi, Hitoshi Matsumoto, Takashi Matsumura, Masanori Ochiai, Yoichi Hayakawa
Recovery from weight loss after stress is important for all organisms, although the recovery mechanisms are not fully understood. We are working to clarify these mechanisms. Here, we recorded enhanced feeding activity of Drosophila melanogaster larvae from 2 to 4 h after heat stress at 35°C for 1 h. During the post-stress period, expression levels of sweet taste gustatory receptor genes (Grs), Gr5a, Gr43a, Gr64a, and Gr64f, were elevated, whereas bitter taste Grs, Gr66a, and Gr33a, were decreased in expression and expression of a non-typical taste receptor Gr, Gr68a, was unchanged...
December 8, 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/29218340/coexisting-properties-of-thermostability-and-ultraviolet-radiation-resistance-in-the-main-s-layer-complex-of-deinococcus-radiodurans
#7
Domenica Farci, Chavdar Slavov, Dario Piano
Deinococcus radiodurans is well known for its unusual resistance to different environmental stresses. Recently, we have described a novel complex composed of the surface (S)-layer protein DR_2577 and the carotenoid deinoxanthin. We also showed a role of this complex in the UV resistance under desiccation. Both these properties, UV and desiccation resistance, suggest a selective pressure generated by Sun irradiation. In order to confirm this hypothesis we checked whether this S-layer Deinoxanthin Binding Complex (SDBC) has features of thermo-resistance, a property also expected in proteins evolved under solar irradiative pressure...
December 8, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/29216553/mathematical-quantification-of-the-induced-stress-resistance-of-microbial-populations-during-non-isothermal-stresses
#8
Alberto Garre, Juan Pablo Huertas, Gerardo A González-Tejedor, Pablo S Fernández, Jose A Egea, Alfredo Palop, Arturo Esnoz
This contribution presents a mathematical model to describe non-isothermal microbial inactivation processes taking into account the acclimation of the microbial cell to thermal stress. The model extends the log-linear inactivation model including a variable and model parameters quantifying the induced thermal resistance. The model has been tested on cells of Escherichia coli against two families of non-isothermal profiles with different constant heating rates. One of the families was composed of monophasic profiles, consisting of a non-isothermal heating stage from 35 to 70°C; the other family was composed of biphasic profiles, consisting of a non-isothermal heating stage followed by a holding period at constant temperature of 57...
November 27, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29216330/genome-wide-analysis-of-the-brachypodium-distachyon-l-p-beauv-hsp90-gene-family-reveals-molecular-evolution-and-expression-profiling-under-drought-and-salt-stresses
#9
Ming Zhang, Zhiwei Shen, Guoqing Meng, Yu Lu, Yilei Wang
The structure, evolution, and function of heat shock proteins 90 (Hsp90s) have been investigated in great detail in fungi and animals. However, studies on the Hsp90 genes in plants are generally limited. Brachypodium distachyon (L.) P. Beauv., as a model plant for cereal crops, has become a potential biofuel grass. During its long evolution, the Hsp90 gene family in Brachypodium has developed some strategies to cope with adverse environments. How the Hsp90 gene family in Brachypodium evolved in different plant lineages and what its role is in plant responses to drought and salt stresses remains to be elucidated...
2017: PloS One
https://www.readbyqxmd.com/read/29216232/indole-at-low-concentration-helps-exponentially-growing-escherichia-coli-survive-at-high-temperature
#10
Junyan Liu, David Summers
A culture of stationary phase Escherichia coli cells has been reported to produce copious indole when exposed to high temperature (50°C), and this response has been proposed to aid survival. We reinvestigated this phenomenon and found that indole production under these conditions is probably not a direct response to heat stress. Rather, E. coli produces indole when growth is prevented, irrespective of whether this is due to heat stress, antibiotic treatment or the removal of nutrients. Moreover, 300μM indole produced at 50°C does not improve the viability of heat stressed cells...
2017: PloS One
https://www.readbyqxmd.com/read/29214857/feeding-time-can-alleviate-negative-effects-of-heat-stress-on-performance-meat-quality-and-health-status-of-turkey
#11
M F A Farghly, M Alagawany, M E Abd El-Hack
1. A total of 180 one-day-old chickens were randomly assigned to 6 equal groups to investigate the effect of feeding time on growth performance, carcass characteristics, meat quality, leg problems and physiological responses of growing turkeys under the high temperature conditions of summer. 2. Birds of the first group were ad libitum fed and were considered as the controls (C). The second group (T1) was given 80% of diet in the morning and 20% of diet in the afternoon, The third group (T2) was given 60% of diet in the morning and 40% of diet in the afternoon, The fourth group (T3) was given 40% of diet in the morning and 60% of diet in the afternoon, The fifth group (T4) was given 20% of diet in the morning and 80% of diet in the afternoon and the sixth group (T5) was given 100% of diet in the afternoon...
December 7, 2017: British Poultry Science
https://www.readbyqxmd.com/read/29214358/multiple-timescale-analysis-of-the-urban-heat-island-effect-based-on-the-community-land-model-a-case-study-of-the-city-of-xi-an-china
#12
Meiling Gao, Huanfeng Shen, Xujun Han, Huifang Li, Liangpei Zhang
Urban heat islands (UHIs) are the phenomenon of urban regions usually being warmer than rural regions, which significantly impacts both the regional ecosystem and societal activities. Numerical simulation can provide spatially and temporally continuous datasets for UHI analysis. In this study, a spatially and temporally continuous ground temperature dataset of Xi'an, China was obtained through numerical simulation based on the Community Land Model version 4.5 (CLM4.5), at a temporal resolution of 30 min and a spatial resolution of 0...
December 6, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29212807/the-independent-and-interactive-effects-of-incremental-heat-strain-orthostatic-stress-and-mild-hypohydration-on-cerebral-perfusion
#13
Rebekah A I Lucas, Luke C Wilson, Philip N Ainslie, Jui-Lin Fan, Kate N Thomas, James D Cotter
The purpose of this study was to identify the dose-dependent effects of heat strain and orthostasis (via lower-body negative pressure; LBNP), with and without mild hypohydration, on systemic function and cerebral perfusion. Eleven males (Mean ±SD: 27 ±7 y; body mass 77 ±6 kg), resting supine in a water-perfused suit, underwent progressive passive heating [0.5°C increments in core temperature (Tc, oesophageal to +2.0°C)] whilst euhydrated (EUH) or hypohydrated (HYPO, 1.5-2% body mass deficit). At each thermal state, mean cerebral artery blood velocity (MCAvmean, Transcranial Doppler), partial pressure of end-tidal carbon dioxide (PETCO2), heart rate (HR) and mean arterial blood pressure (MAP, photoplethysmography) were measured continuously during LBNP (0, -15, -30, -45 mm Hg)...
December 6, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29212325/chronic-heat-stress-impairs-meat-quality-of-breast-muscle-in-broilers-through-affecting-redox-status-and-energy-substances-metabolism
#14
Zhuang Lu, Xiaofang He, Bingbing Ma, Lin Zhang, Jiaolong Li, Yun Jiang, Guanghong Zhou, Feng Gao
We investigated the molecular mechanisms of chronic heat stress impairing broilers breast meat quality. Broilers were assigned to three groups including normal control (NC) group, heat stress (HS) group and pair-fed (PF) group. After 7d of heat exposure (32°C), high temperature caused oxidative stress, and elevated the activity of citrate synthase (CS), mRNA expression of M-CPT1, and phosphorylation level of AMPKα, and reduced the mRNA expression of avUCP. After 14d of heat exposure, heat stress increased lightness and drip loss and decreased pH and shear force of breast meat...
December 7, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29210435/left-and-right-circularly-polarized-light-sensing-based-on-colored-and-mechano-responsive-chiral-nematic-liquid-crystals
#15
Jun Yoshida, Shuhei Tamura, Hidetaka Yuge, Go Watanabe
A liquid crystal host-guest system composed of achiral organic molecules (host) and colored chiral metal complexes (guest) was fabricated to sense both right- and left-handed circularly polarized light (r- and l-CPL), depending on the guest (dopant) concentration. The CPL-sensing can be reversibly turned on and off upon mechanical stress and heating.
December 6, 2017: Soft Matter
https://www.readbyqxmd.com/read/29209779/central-regulation-of-brown-adipose-tissue-thermogenesis-and-energy-homeostasis-dependent-on-food-availability
#16
REVIEW
Yoshiko Nakamura, Kazuhiro Nakamura
Energy homeostasis of mammals is maintained by balancing energy expenditure within the body and energy intake through feeding. Several lines of evidence indicate that brown adipose tissue (BAT), a sympathetically activated thermogenic organ, turns excess energy into heat to maintain the energy balance in rodents and humans, in addition to its thermoregulatory role for the defense of body core temperature in cold environments. Elucidating the central circuit mechanism controlling BAT thermogenesis dependent on nutritional conditions and food availability in relation to energy homeostasis is essential to understand the etiology of symptoms caused by energy imbalance, such as obesity...
December 5, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/29209556/chinese-herbal-medicines-as-potential-agents-for-alleviation-of-heat-stress-in-poultry
#17
Parisa Shokryazdan, Mohammad Faseleh Jahromi, Salwani Md Saadand, Mahdi Ebrahimi, Zulkifli Idrus, Hailong Zhou, Xiao Ping Diao, Juan Boo Liang
Heat stress negatively affects the productivity of chickens in commercial poultry farms in humid tropics. In this study, the concentrations and types of the antioxidant compounds of eight Chinese herbal medicines, which have previously demonstrated promising effects on suppressing heat stress as a mixture, were investigated using reversed-phase High Performance Liquid Chromatography, spectrophotometry, Liquid Chromatography Mass Spectrometry, and Gas-Liquid Chromatography. Our results provided the levels of phenolic compounds, total amounts of sugars, and total unsaturated fatty acids in the herbal extracts...
2017: Scientifica
https://www.readbyqxmd.com/read/29209505/evaluation-of-environmental-heat-stress-on-physiological-parameters
#18
Zahra Zamanian, Zahra Sedaghat, Masoud Hemehrezaee, Farahnaz Khajehnasiri
Background: Thermal component of the atmospheric environment is an important issue which is related to human's health. Thermal environment includes both heat exchange conditions (stress) and the physiological response (strain). The aim of this study was to measure the association of heat indices (PSI, HSI, Humidex) especially subjective one (STI) with some physiological parameters (Blood pressure, pulse rate and skin temperature). Methods: This is a cross-sectional study conducted on 387 male farmers on Boukan, West Azerbaijan, Iran in 2016...
2017: Journal of Environmental Health Science & Engineering
https://www.readbyqxmd.com/read/29209372/heat-shock-protein-27-plays-a-protective-role-in-thoracic-aortic-dissection-by-promoting-cell-proliferation-and-inhibiting-apoptosis
#19
Sili Zou, Mingfang Liao, Junlin Yang, Tong Huang, Mark Green, Jianjin Wu, Lefeng Qu
Background: Thoracic aortic dissection (TAD) is one of the most severe aortic diseases. The study aimed to explore the potential role of heat shock protein 27 (HSP27) in the pathogenesis of TAD using an in vitro model of oxidative stress in vascular smooth muscle cells (VSMCs). Methods: HSP27 was analyzed in aortic surgical specimens from 12 patients with TAD and 8 healthy controls. A lentiviral vector was used to overexpress HSP27 in rat aortic VSMCs. Cell proliferation and apoptosis were measured under oxidative stress induced by H2O2...
2017: Cellular & Molecular Biology Letters
https://www.readbyqxmd.com/read/29209335/identification-and-expression-profile-of-cypome-in-perennial-ryegrass-and-tall-fescue-in-response-to-temperature-stress
#20
Xiang Tao, Ming-Xiu Wang, Ya Dai, Yan Wang, Yan-Fen Fan, Ping Mao, Xin-Rong Ma
Plant cytochrome P450s are involved in a wide range of biosynthetic reactions that generate various biomolecules, including a variety of defensive compounds. Perennial ryegrass (Lolium perenne) and tall fescue (Festuca arundinacea) are two major species of turf and forage grasses that usually experience low temperature below -10°C and high temperature over 38°C around the world. In this study, we re-analyzed transcriptome of perennial ryegrass and tall fescue treated with heat and cold stress. Thus, we can evaluate P450 composition in these species and confirm whether P450 genes response to temperature stress...
2017: Frontiers in Plant Science
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