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https://www.readbyqxmd.com/read/29242620/protective-role-of-trehalose-during-radiation-and-heavy-metal-stress-in-aureobasidium-subglaciale-f134
#1
Tingting Liu, Liying Zhu, Zhiping Zhang, He Huang, Zhidong Zhang, Ling Jiang
An isolated black yeast-like strain was obtained from radiation-polluted soil collected from Xinjiang province in northwest China. On the basis of ITS and LSU rDNA sequence analysis, in combination with the colony morphology and phenotypic properties, the isolated strain was revealed to represent a novel variety of Aureobasidium subglaciale, designated as A. subglaciale F134. Compared to other yeasts and bacteria, this isolate displayed superior resistance to gamma irradiation, UV light, and heavy metal ions...
December 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29240755/integrating-transcriptomics-and-metabolomics-to-characterize-the-regulation-of-epa-biosynthesis-in-response-to-cold-stress-in-seaweed-bangia-fuscopurpurea
#2
Min Cao, Dongmei Wang, Yunxiang Mao, Fanna Kong, Guiqi Bi, Qikun Xing, Zhen Weng
Bangia fuscopurpurea is a traditional mariculture crop having high nutritional value, eicosapntemacnioc acid (EPA) production, and protein content. As an intertidal species, it can tolerate drastic changes in abiotic factors such as temperature, hydration, and light radiation; however, genomic information on the evolutionary aspect and mechanism of EPA enrichment in B. fuscopurpurea and the role of EPA in cold tolerance in this species remain elusive. We conducted transcriptome profile analysis in B. fuscopurpurea to investigate the biological functions of genes associated with resistance to various environment factors...
2017: PloS One
https://www.readbyqxmd.com/read/29240233/blue-honeysuckle-lonicera-caerulea-subsp-edulis-turcz-ex-herder-hult%C3%A3-n-berries-and-changes-in-their-ingredients-across-different-locations
#3
Mateja Senica, Martina Bavec, Franci Stampar, Maja Mikulic-Petkovsek
BACKGROUND: Interest in organic blue honeysuckle berries has increased in recent years. They are rich in various health promoting compounds, which are sensitive to different environmental factors and are modified during the growing season. RESULTS: Honeysuckle berries from different locations significantly differed in contents of primary and secondary metabolites. The location Ogulin, with the highest altitude and, consequently, high UV-radiation, had the highest phenolics content (259...
December 14, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29239088/quantitative-evaluation-of-cue-induced-reinstatement-model-for-evidence-based-experimental-optimization
#4
Julia Oberhofer, Hamid R Noori
Cue-induced reinstatement is a widely used model for investigating relapse of reward-seeking behavior with high face validity in relation to clinical observations. Yet, face validity is not sufficient to evaluate an animal model, and quantitative, evidence-based analysis is required to estimate the ultimate applicability of this paradigm. Furthermore, such analysis would allow an accurate and reproducible design of future experiments. Here, we conducted meta-analysis and cluster analysis to characterize the impact of cue type (visual, auditory, olfactory or combinations thereof), intensity (e...
December 14, 2017: Addiction Biology
https://www.readbyqxmd.com/read/29234667/a-matter-of-taste-lineage-specific-loss-of-function-of-taste-receptor-genes-in-vertebrates
#5
REVIEW
Marco Antinucci, Davide Risso
Vertebrates can perceive at least five different taste qualities, each of which is thought to have a specific role in the evolution of different species. The avoidance of potentially poisonous foods, which are generally bitter or sour tasting, and the search for more nutritious ones, those with high-fat and high-sugar content, are two of the most well-known examples. The study of taste genes encoding receptors that recognize ligands triggering taste sensations has helped to reconstruct several evolutionary adaptations to dietary changes...
2017: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/29234372/hawthorn-leaf-flavonoids-protect-against-diabetes-induced-cardiomyopathy-in-rats-via-pkc-%C3%AE-signaling-pathway
#6
Qing Min, Yuting Bai, Yuchen Zhang, Wei Yu, Minli Zhang, Dongyang Liu, Tingting Diao, Wei Lv
Objectives: DCM has become one of the main reasons of death in diabetic patients. In this study, we aimed to explore the hawthorn leaf flavonoids (HLF) protective effect against diabetes-induced cardiac injury and the underlying mechanisms in experimental rats. Methods: Experimental diabetic model was induced by intraperitoneal injection of streptozotocin (STZ, 40 mg/kg) in rats after feeding with high-fat diet for 8 weeks. The diabetic rats received a 16-week treatment of different doses of HLF (50, 100, and 200)...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29233855/the-plastid-lipocalin-lcnp-is-required-for-sustained-photoprotective-energy-dissipation-in-arabidopsis
#7
Alizée Malnoë, Alex Schultink, Sanya Shahrasbi, Dominique Rumeau, Michel Havaux, Krishna K Niyogi
Light utilization is finely tuned in photosynthetic organisms to prevent cellular damage. The dissipation of excess absorbed light energy, a process termed NPQ, plays an important role in photoprotection. Little is known about the sustained or slowly reversible form(s) of NPQ and whether they are photoprotective, in part due to the lack of mutants. The Arabidopsis thaliana suppressor of quenching1 (soq1) mutant exhibits enhanced sustained NPQ, which we term qH. To identify molecular players involved in qH, we screened for suppressors of soq1 and isolated mutants affecting either chlorophyllide a oxygenase (CAO) or the chloroplastic lipocalin (CHL), now renamed plastid lipocalin (LCNP)...
December 12, 2017: Plant Cell
https://www.readbyqxmd.com/read/29233601/coping-with-dark-sides-of-the-sun-through-photoreceptor-signaling
#8
REVIEW
Emilie Demarsy, Michel Goldschmidt-Clermont, Roman Ulm
Plants grow in constantly changing environments, including highly variable light intensities. Sunlight provides the energy that drives photosynthesis and is thus of the utmost importance for plant growth and the generation of oxygen, which the majority of life on Earth depends on. However, exposure to either insufficient or excess levels of light can have detrimental effects and cause light stress. Whereas exposure to insufficient light limits photosynthetic activity, resulting in 'energy starvation', exposure to excess light can damage the photosynthetic apparatus...
December 9, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/29230609/comparative-assessment-of-chloroplast-transcriptional-responses-highlights-conserved-and-unique-patterns-across-triticeae-members-under-salt-stress
#9
Saeid Mirzaei, Mehdi Mansouri, Ghasem Mohammadi-Nejad, Gaurav Sablok
Chloroplast functional genomics, in particular understanding the chloroplast transcriptional response is of immense importance mainly due to its role in oxygenic photosynthesis. As a photosynthetic unit, its efficiency and transcriptional activity is directly regulated by reactive oxygen species during abiotic and biotic stress and subsequently affects carbon assimilation, and plant biomass. In crops, understanding photosynthesis is crucial for crop domestication by identifying the traits that could be exploited for crop improvement...
December 11, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/29228257/physiological-response-of-prorocentrum-lima-dinophyceae-to-varying-light-intensities
#10
Helena David, Aitor Laza-Martínez, Jacco C Kromkamp, Emma Orive
The benthic dinoflagellate Prorocentrum lima is among the most common toxic morphospecies with a cosmopolitan distribution. This study explored if strains from different environments and different morphotypes, isolated from three locations in the Atlantic Iberian Peninsula and two from the Mediterranean Sea, showed different responses to varying light regimes, after confirming that all strains belonged to the same ribotype. Growth rates and photosynthetic parameters such as Fo, Fv/Fm, and rETRmax were analyzed with a Coulter counter, a Water-PAM and a FRRF...
December 6, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/29225313/ingestion-of-coffee-polyphenols-improves-a-scaly-skin-surface-and-the-recovery-rate-of-skin-temperature-after-cold-stress-a-randomized-controlled-trial
#11
Sachie Ueda, Masanori Tanahashi, Yuko Higaki, Kayoko Iwata, Yoshinori Sugiyama
Coffee polyphenols (CPPs) derived from coffee beans have beneficial effects on blood pressure and vascular endothelial function. In addition, CPPs suppress ultraviolet light induced erythema. However, the effects of CPPs on dry skin and cutaneous vascular function have not been clarified. We investigated the effects of CPPs on dry skin and the recovery rate (RR) of skin temperature after a cold-stress test as a measure of vascular function in subjects with visible scaliness in a double-blind, placebo-controlled, randomized study...
2017: Journal of Nutritional Science and Vitaminology
https://www.readbyqxmd.com/read/29224121/high-definition-infrared-thermography-of-ice-nucleation-and-propagation-in-wheat-under-natural-frost-conditions-and-controlled-freezing
#12
David P Livingston, Tan D Tuong, J Paul Murphy, Lawrence V Gusta, Ian Willick, Micheal E Wisniewski
An extremely high resolution infrared camera demonstrated various freezing events in wheat under natural conditions. Many of those events shed light on years of misunderstanding regarding freezing in small grains. Infrared thermography has enhanced our knowledge of ice nucleation and propagation in plants through visualization of the freezing process. The majority of infrared analyses have been conducted under controlled conditions and often on individual organs instead of whole plants. In the present study, high-definition (1280 × 720 pixel resolution) infrared thermography was used under natural conditions to visualize the freezing process of wheat plants during freezing events in 2016 and 2017...
December 9, 2017: Planta
https://www.readbyqxmd.com/read/29221059/metallic-fresnel-zone-plate-implemented-on-an-optical-fiber-facet-for-super-variable-focusing-of-light
#13
Hyuntai Kim, Jinseob Kim, Haechan An, Yohan Lee, Gun-Yeal Lee, Jeongkyun Na, Kyoungyoon Park, Seungjong Lee, Seung-Yeol Lee, Byoungho Lee, Yoonchan Jeong
We propose and investigate a metallic Fresnel zone plate (FZP/MFZP) implemented on a silver-coated optical fiber facet for super-variable focusing of light, the focal point of which can be drastically relocated by varying the wavelength of the incident light. We numerically show that when its nominal focal length is set to 20 μm at 550 nm, its effective focal length can be tuned by ~13.7 μm for 300-nm change in the visible wavelength range. This tuning sensitivity is over 20 times higher than that of a conventional silica-based spherical lens...
November 27, 2017: Optics Express
https://www.readbyqxmd.com/read/29219173/parenting-stress-anxiety-and-depression-in-mothers-with-visually-impaired-infants-a-cross-sectional-and-longitudinal-cohort-analysis
#14
Elena Sakkalou, Hanna Sakki, Michelle A O'reilly, Alison T Salt, Naomi J Dale
AIM: This study examined cross-sectional and longitudinal patterns of parenting stress, adult anxiety, and depression in mothers of children with profound or severe visual impairment (PVI or SVI) at 1 year and 2 years of age. METHOD: Mothers of a national longitudinal cohort (OPTIMUM Project) of infants with congenital disorders of the peripheral visual system and PVI (light perception at best) or SVI (basic 'form' vision of non-light reflecting objects) participated...
December 8, 2017: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/29216280/phenotypic-characterization-of-synechocystis-sp-pcc-6803-substrains-reveals-differences-in-sensitivity-to-abiotic-stress
#15
Tomáš Zavřel, Petra Očenášová, Jan Červený
Synechocystis sp. PCC 6803 is a widely used model cyanobacterium, whose substrains can vary on both genotype and phenotype levels. Previously described phenotypic variations include ability of mixotrophic growth, ability of movement on agar plates and variations in pigments composition or cell size. In this study, we report for the first time significant variation among Synechocystis substrains in complex cellular traits such as growth rate, photosynthesis efficiency, cellular dry weight and cellular composition (including protein or carbohydrates content)...
2017: PloS One
https://www.readbyqxmd.com/read/29215784/neither-dark-nor-light-but-shades-in-between-cocoa-merits-a-finer-sampling
#16
Lindsey Norgrove
Abdulai et al. (2017), working in Akumadan in the forest-savannah transition zone of Ghana, compared three cocoa (Theobroma cacao) systems in periods of wet, dry and extremely dry weather. These were cocoa grown: (a) in an agroforestry system under a leguminous tree (Albizia ferruginea); (b) in an agroforestry system under one of the most common shade trees (Antiaris toxicaria) in the region; and, (c) under "full sun conditions". During the extremely dry period, the cocoa in agroforestry systems had massive stress, reduced sap flux and high mortality...
December 7, 2017: Global Change Biology
https://www.readbyqxmd.com/read/29215778/declines-in-moth-populations-stress-the-need-for-conserving-dark-nights
#17
Frank van Langevelde, Marijke Braamburg-Annegarn, Martinus E Huigens, Rob Groendijk, Olivier Poitevin, Jurriën R van Deijk, Willem N Ellis, Roy H A van Grunsven, Rob de Vos, Rutger A Vos, Markus Franzén, Michiel F Wallis DeVries
Given the global continuous rise, artificial light at night is often considered a driving force behind moth population declines. Although negative effects on individuals have been shown, there is no evidence for effects on population sizes to date. Therefore, we compared population trends of Dutch macro-moth fauna over the period 1985-2015 between moth species that differ in phototaxis and adult circadian rhythm. We found that moth species that show positive phototaxis or are nocturnally active have stronger negative population trends than species that are not attracted to light or are diurnal species...
December 7, 2017: Global Change Biology
https://www.readbyqxmd.com/read/29214052/neuroprotective-role-of-retinal-sirt3-against-acute-photo-stress
#18
Norimitsu Ban, Yoko Ozawa, Hideto Osada, Jonathan B Lin, Eriko Toda, Mitsuhiro Watanabe, Kenya Yuki, Shunsuke Kubota, Rajendra S Apte, Kazuo Tsubota
SIRT3 is a key regulator of mitochondrial reactive oxygen species as well as mitochondrial function. The retina is one of the highest energy-demanding tissues, in which the regulation of reactive oxygen species is critical to prevent retinal neurodegeneration. Although previous reports have demonstrated that SIRT3 is highly expressed in the retina and important in neuroprotection, function of SIRT3 in regulating reactive oxygen species in the retina is largely unknown. In this study, we investigated the role of retinal SIRT3 in a light-induced retinal degeneration model using SIRT3 knockout mice...
2017: NPJ Aging and Mechanisms of Disease
https://www.readbyqxmd.com/read/29212723/intraspecific-and-interspecific-variation-in-thermotolerance-and-photoacclimation-in-symbiodinium-dinoflagellates
#19
Erika M Díaz-Almeyda, C Prada, A H Ohdera, H Moran, D J Civitello, R Iglesias-Prieto, T A Carlo, T C LaJeunesse, M Medina
Light and temperature are major drivers in the ecology and biogeography of symbiotic dinoflagellates living in corals and other cnidarians. We examined variations in physiology among 11 strains comprising five species of clade A Symbiodinium We grew cultures at 26°C (control) and 32°C (high temperature) over a duration of 18 days while measuring growth and photochemical efficiency (Fv /Fm ). Responses to thermal stress ranged from susceptible to tolerant across species and strains. Most strains exhibited a decrease in cell densities and Fv /Fm when grown at 32°C...
December 6, 2017: Proceedings. Biological Sciences
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
#20
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
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