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https://www.readbyqxmd.com/read/28326094/selection-and-validation-of-reference-genes-for-accurate-rt-qpcr-data-normalization-in-coffea-spp-under-a-climate-changes-context-of-interacting-elevated-co2-and-temperature
#1
Madlles Q Martins, Ana S Fortunato, Weverton P Rodrigues, Fábio L Partelli, Eliemar Campostrini, Fernando C Lidon, Fábio M DaMatta, José C Ramalho, Ana I Ribeiro-Barros
World coffee production has faced increasing challenges associated with ongoing climatic changes. Several studies, which have been almost exclusively based on temperature increase, have predicted extensive reductions (higher than half by 2,050) of actual coffee cropped areas. However, recent studies showed that elevated [CO2] can strongly mitigate the negative impacts of heat stress at the physiological and biochemical levels in coffee leaves. In addition, it has also been shown that coffee genotypes can successfully cope with temperatures above what has been traditionally accepted...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28326066/beneficial-microorganisms-for-corals-bmc-proposed-mechanisms-for-coral-health-and-resilience
#2
REVIEW
Raquel S Peixoto, Phillipe M Rosado, Deborah Catharine de Assis Leite, Alexandre S Rosado, David G Bourne
The symbiotic association between the coral animal and its endosymbiotic dinoflagellate partner Symbiodinium is central to the success of corals. However, an array of other microorganisms associated with coral (i.e., Bacteria, Archaea, Fungi, and viruses) have a complex and intricate role in maintaining homeostasis between corals and Symbiodinium. Corals are sensitive to shifts in the surrounding environmental conditions. One of the most widely reported responses of coral to stressful environmental conditions is bleaching...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28324835/flexible-biological-arsenite-oxidation-utilizing-nox-and-o2-as-alternative-electron-acceptors
#3
Jie Wang, Junfeng Wan, Zihao Wu, Hongli Li, Haisong Li, Christophe Dagot, Yan Wang
The feasibility of flexible microbial arsenite (As(III)) oxidation coupled with the reduction of different electron acceptors was investigated. The results indicated the acclimated microorganisms could oxidize As(III) with oxygen, nitrate and nitrite as the alternative electron acceptors. A series of batch tests were conducted to measure the kinetic parameters of As(III) oxidation and to evaluate the effects of environmental conditions including pH and temperature on the activity of biological As(III) oxidation dependent on different electron acceptors...
March 18, 2017: Chemosphere
https://www.readbyqxmd.com/read/28324156/molecular-characterization-of-two-rhesus-glycoproteins-from-the-euryhaline-freshwater-white-rimmed-stingray-himantura-signifer-and-changes-in-their-transcript-levels-and-protein-abundance-in-the-gills-kidney-and-liver-during-brackish-water-acclimation
#4
Cheng T Yeam, You R Chng, Jasmine L Y Ong, Wai P Wong, Shit F Chew, Yuen K Ip
Himantura signifer is a freshwater stingray which inhabits rivers in Southeast Asia. It is ammonotelic in fresh water, but retains the capacities of urea synthesis and ureosmotic osmoregulation to survive in brackish water. This study aimed to elucidate the roles of Rhesus glycoproteins (Rhgp), which are known to transport ammonia, in conserving nitrogen (N) in H. signifer during brackish water acclimation when N became limited resulting from increased hepatic urea synthesis. The complete coding sequence of rhbg from H...
March 21, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28322186/effect-of-isoflurane-anesthesia-on-circadian-metabolism-and-physiology-in-rats
#5
Melissa A Wren-Dail Robert T Dauchy David E Blask Steven M Hill Tara G Ooms Lynell M Dupepe And Rudolf P Bohm
Isoflurane anesthesia alters the blood levels of several neuroendocrine hormones associated with normal metabolism andphysiology and increases stress, but the effect of brief CO2 anesthesia on these parameters is unknown. In this study, we examined the effects of isoflurane (4%) compared with brief CO2 (70% CO2, 30% air) anesthesia on circadian rhythms of plasma measures of physiology and metabolism. Adult male Sprague-Dawley rats (Crl:SD; n = 6 per group) were maintained on a 12:12-h light:dark(300 lx; lights on, 0600) photoperiod...
March 20, 2017: Comparative Medicine
https://www.readbyqxmd.com/read/28321883/higher-photosynthesis-nutrient-and-energy-use-efficiencies-contribute-to-invasiveness-of-exotic-plants-in-a-nutrient-poor-habitat-in-northeast-china
#6
Ming-Chao Liu, De-Liang Kong, Xiu-Rong Lu, Kai Huang, Shuo Wang, Wei-Bin Wang, Bo Qu, Yu-Long Feng
The roles of photosynthesis-related traits in invasiveness of introduced plant species are still not well elucidated, especially in nutrient-poor habitats. In addition, little effort has been made to determine the physiological causes and consequences of the difference in these traits between invasive and native plants. To address these problems, we compared the differences in 16 leaf functional traits related to light-saturated photosynthetic rate (Pmax ) between 22 invasive and native plants in a nutrient-poor habitat in northeast China...
March 20, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28320890/a-biophysical-vascular-bubble-model-for-devising-decompression-procedures
#7
Ran Arieli, Abraham Marmur
Vascular bubble models, which present a realistic biophysical approach, hold great promise for devising suitable diver decompression procedures. Nanobubbles were found to nucleate on a flat hydrophobic surface, expanding to form bubbles after decompression. Such active hydrophobic spots (AHS) were formed from lung surfactants on the luminal aspect of ovine blood vessels. Many of the phenomena observed in these bubbling vessels correlated with those known to occur in diving. On the basis of our previous studies, which proposed a new model for the formation of arterial bubbles, we now suggest the biophysical model presented herein...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28320288/analysis-of-photoprotection-and-apparent-non-photochemical-quenching-of-chlorophyll-fluorescence-in-tradescantia-leaves-based-on-the-rate-of-irradiance-induced-changes-in-optical-transparence
#8
V V Ptushenko, O S Ptushenko, O P Samoilova, A E Solovchenko
The kinetics of irradiation-induced changes in leaf optical transparence (ΔT) and non-photochemical quenching (NPQ) of chlorophyll fluorescence in Tradescantia fluminensis and T. sillamontana leaves adapted to different irradiance in nature was analyzed. Characteristic times of a photoinduced increase and a dark decline of ΔT in these species were 12 and 20 min, respectively. The ΔT was not confirmed to be the main contributor to the observed middle phase of NPQ relaxation kinetics (τ = 10-28 min). Comparison of rate of photoinduced increase in ΔT and photosystem II quantum yield recovery showed that the former did not affect the tolerance of the photosynthetic apparatus (PSA) to irradiances up to 150 µmol PAR·m(-2)·s(-1)...
January 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28317479/climate-changes-and-human-health-a-review-of-the-effect-of-environmental-stressors-on-cardiovascular-diseases-across-epidemiology-and-biological-mechanisms
#9
Paolo Giorgini, Paolo Di Giosia, Marco Petrarca, Francesco Lattanzio, Cosimo Andrea Stamerra, Claudio Ferri
BACKGROUND: Climate change is rapidly affecting all the regions of our planet. The most relevant example is global warming, which impacts on the earth's ecosystems, threatening human health. Other effects include extreme variations in temperature and increases in air pollution. These events may negatively impact mortality and morbidity for cardiovascular diseases. METHODS: In this review, we discuss the main effects of climate changes on cardiovascular diseases, reporting the epidemiological evidences and the biological mechanisms linking climate change consequences to hypertension, diabetes, ischemic heart diseases, heart failure and stroke...
March 17, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28315970/a-root-penetration-model-of-arabidopsis-thaliana-in-phytagel-medium-with-different-strength
#10
Jie Yan, Bochu Wang, Yong Zhou
Phytagel media were evaluated as systems to mechanically impede roots of A. thaliana. Studying mechanical properties of Phytagel and exploring the root response to mechanical stimulation can facilitate plant culture and plant development. Breaking strengths of 0.5-2.0% phytagel media were tested by uniaxial compression test. Different phytagel concentrations were set to alter the strength of layers in growth medium. Negative correlations were observed between root length, straightness and medium strength. When roots elongated through soft upper-layer (0...
March 18, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28315315/connectivity-among-photosystem-ii-centers-in-phytoplankters-patterns-and-responses
#11
Kui Xu, Jessica L Grant-Burt, Natalie Donaher, Douglas A Campbell
Fast Repetition and Relaxation chlorophyll fluorescence induction is used to estimate the effective absorption cross section of PSII (σPSII), to analyze phytoplankton acclimation and electron transport. The fitting coefficient ρ measures excitation transfer from closed PSII to remaining open PSII upon illumination, which could theoretically generate a progressive increase in σPSII for the remaining open PSII. To investigate how ρ responds to illumination we grew marine phytoplankters with diverse antenna structures (Prochlorococcus, Synechococcus, Ostreococcus and Thalassiosira pseudonana) under limiting or saturating growth light...
March 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28314795/unique-physiological-and-transcriptional-shifts-under-combinations-of-salinity-drought-and-heat
#12
Lidor Shaar-Moshe, Eduardo Blumwald, Zvi Peleg
Climate change-driven stresses such as extreme temperatures, water deficit, and ion imbalance are projected to exacerbate and jeopardize global food security. Under field conditions, these stresses usually occur simultaneously and cause damages that exceed single stresses. Here, we investigated the transcriptional patterns and morpho-physiological acclimations, of Brachypodium dystachion, to single salinity, drought and heat stresses as well as their double and triple stress combinations. Hierarchical clustering analysis of morpho-physiological acclimations showed that several traits exhibited a gradually aggravating effect as plants were exposed to combined stresses...
March 17, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28303185/long-term-acclimation-to-reciprocal-light-conditions-suggests-depth-related-selection-in-the-marine-foundation-species-posidonia-oceanica
#13
Emanuela Dattolo, Lazaro Marín-Guirao, Juan M Ruiz, Gabriele Procaccini
Phenotypic differences among populations of the same species reflect selective responses to ecological gradients produced by variations in abiotic and biotic factors. Moreover, they can also originate from genetic differences among populations, due to a reduced gene flow. In this study, we examined the extent of differences in photo-acclimative traits of Posidonia oceanica (L.) Delile clones collected above and below the summer thermocline (i.e., -5 and -25 m) in a continuous population extending along the water depth gradient...
February 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28302069/bioinformatics-identification-of-new-targets-for-improving-low-temperature-stress-tolerance-in-spring-and-winter-wheat
#14
Alain B Tchagang, François Fauteux, Dan Tulpan, Youlian Pan
BACKGROUND: Phenotypic studies in Triticeae have shown that low temperature-induced protective mechanisms are developmentally regulated and involve dynamic acclimation processes. Understanding these mechanisms is important for breeding cold-resistant wheat cultivars. In this study, we combined three computational techniques for the analysis of gene expression data from spring and winter wheat cultivars subjected to low temperature treatments. Our main objective was to construct a comprehensive network of cold response transcriptional events in wheat, and to identify novel cold tolerance candidate genes in wheat...
March 16, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28295753/identification-of-stn7-stn8-kinase-targets-reveals-connections-between-electron-transport-metabolism-and-gene-expression
#15
Anna Schönberg, Anja Rödiger, Wiebke Mehwald, Johann Galonska, Gideon Christ, Stefan Helm, Domenika Thieme, Petra Majovsky, Wolfgang Hoehenwarter, Sacha Baginsky
The thylakoid-associated kinases STN7 and STN8 are involved in short- and long-term acclimation of photosynthetic electron transport to changing light conditions. Here we report the identification of STN7/STN8 in vivo targets that connect photosynthetic electron transport with metabolism and gene expression. Comparative phosphoproteomics with the stn7 and stn8 single and double mutants identified two proteases, one RNA-binding protein, a ribosomal protein, the large subunit of rubisco and a ferredoxin-NADP reductase as targets for the thylakoid-associated kinases...
March 14, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28294575/variation-in-adult-stress-resistance-does-not-explain-vulnerability-to-climate-change-in-copper-butterflies
#16
Michael Klockmann, Leonard Wallmeyer, Klaus Fischer
Ongoing climate change is a major threat to biodiversity. However, although many species clearly suffer from ongoing climate change, others benefit from it e.g., by showing range expansions. However, which specific features determine a species' vulnerability to climate change? Phenotypic plasticity, which has been described as the first line of defence against environmental change, may be of utmost importance here. Against this background, we here compare plasticity in stress tolerance in three Copper butterfly species, which differ arguably in their vulnerability to climate change...
March 15, 2017: Insect Science
https://www.readbyqxmd.com/read/28292879/%C3%AE-gpa-treatment-leads-to-elevated-basal-metabolic-rate-and-enhanced-hypoxic-exercise-tolerance-in-mice
#17
Trenton T Ross, Jeffrey D Overton, Katelyn F Houmard, Stephen T Kinsey
Treatments that increase basal metabolic rate (BMR) and enhance exercise capacity may be useful therapeutic approaches for treating conditions such as type 2 diabetes, obesity, and associated circulatory problems. β-guanidinopropionic acid (β-GPA) supplementation decreases high-energy phosphate concentrations, such as ATP and phosphocreatine (PCr) resulting in an energetic challenge that is similar to both exercise programs and hypoxic conditions. In this study, we administered β-GPA to mice for 2 or 6 weeks, and investigated the effect on muscle energetic status, body and muscle mass, muscle capillarity, BMR, and normoxic and hypoxic exercise tolerance (NET and HET, respectively)...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28292684/meta-analytical-assessment-of-the-effects-of-protocol-variations-on-cortisol-responses-to-the-trier-social-stress-test
#18
REVIEW
William K Goodman, Johanna Janson, Jutta M Wolf
BACKGROUND: The Trier Social Stress Test (TSST) is one of the most widely used laboratory stress tests. Exposure to this psychosocial stressor has been shown to stimulate an acute cortisol stress response in the majority of healthy individuals, while deviations from the typical pattern, i.e., cortisol reactivity dysfunctions have been linked to an ever-increasing number of negative health outcomes. However, significant variability between labs exists in strength of observed cortisol responses in healthy individuals...
March 1, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28291808/foraging-and-metabolic-consequences-of-semi-anadromy-for-an-endangered-estuarine-fish
#19
Bruce G Hammock, Steven B Slater, Randall D Baxter, Nann A Fangue, Dennis Cocherell, April Hennessy, Tomofumi Kurobe, Christopher Y Tai, Swee J Teh
Diadromy affords fish access to productive ecosystems, increasing growth and ultimately fitness, but it is unclear whether these advantages persist for species migrating within highly altered habitat. Here, we compared the foraging success of wild Delta Smelt-an endangered, zooplanktivorous, annual, semi-anadromous fish that is endemic to the highly altered San Francisco Estuary (SFE)-collected from freshwater (<0.55 psu) and brackish habitat (≥0.55 psu). Stomach fullness, averaged across three generations of wild Delta Smelt sampled from juvenile through adult life stages (n = 1,318), was 1...
2017: PloS One
https://www.readbyqxmd.com/read/28289730/indirect-interspecies-regulation-transcriptional-and-physiological-responses-of-a-cyanobacterium-to-heterotrophic-partnership
#20
Hans C Bernstein, Ryan S McClure, Vera Thiel, Natalie C Sadler, Young-Mo Kim, William B Chrisler, Eric A Hill, Donald A Bryant, Margaret F Romine, Janet K Jansson, Jim K Fredrickson, Alexander S Beliaev
The mechanisms by which microbes interact in communities remain poorly understood. Here, we interrogated specific interactions between photoautotrophic and heterotrophic members of a model consortium to infer mechanisms that mediate metabolic coupling and acclimation to partnership. This binary consortium was composed of a cyanobacterium, Thermosynechococcus elongatus BP-1, which supported growth of an obligate aerobic heterotroph, Meiothermus ruber strain A, by providing organic carbon, O2, and reduced nitrogen...
March 2017: MSystems
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