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https://www.readbyqxmd.com/read/28727210/thermal-affinity-as-the-dominant-factor-changing-mediterranean-fish-abundances
#1
Or Givan, Dor Edelist, Oren Sonin, Jonathan Belmaker
Recent decades have seen profound changes in species abundance and community composition. In the marine environment, the major anthropogenic drivers of change comprise exploitation, invasion by non-indigenous species, and climate change. However, the magnitude of these stressors has been widely debated and we lack empirical estimates of their relative importance. In this study, we focused on Eastern Mediterranean, a region exposed to an invasion of species of Red Sea origin, extreme climate change, and high fishing pressure...
July 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28727006/genetic-analysis-of-semen-production-traits-of-japanese-black-and-holstein-bulls-genome-wide-marker-based-estimation-of-genetic-parameters-and-environmental-effect-trends
#2
Y Atagi, A Onogi, M Kinukawa, A Ogino, K Kurogi, K Uchiyama, T Yasumori, K Adachi, K Togashi, H Iwata
The semen production traits of bulls from 2 major cattle breeds in Japan, Holstein and Japanese Black, were analyzed comprehensively using genome-wide markers. Weaker genetic correlations were observed between the 2 age groups (1 to 3 yr old and 4 to 6 yr old) regarding semen volume and sperm motility compared with those observed for sperm number and motility after freeze-thawing. The preselection of collected semen for freezing had a limited effect. Given the increasing importance of bull proofs at a young age because of genomic selection and the results from preliminary studies, we used a multiple-trait model that included motility after freeze-thawing with records collected at young ages...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726288/hot-dogs-high-ambient-temperatures-impact-reproductive-success-in-a-tropical-carnivore
#3
Rosie Woodroffe, Rosemary Groom, J Weldon McNutt
Climate change imposes an urgent need to recognise and conserve the species likely to be worst affected. However, while ecologists have mostly explored indirect effects of rising ambient temperatures on temperate and polar species, physiologists have predicted direct impacts on tropical species. The African wild dog (Lycaon pictus), a tropical species, exhibits few of the traits typically used to predict climate change vulnerability. Nevertheless, we predicted that wild dog populations might be sensitive to weather conditions, because the species shows strongly seasonal reproduction across most of its geographical range...
July 19, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28715138/microbial-functional-diversity-covaries-with-permafrost-thaw-induced-environmental-heterogeneity-in-tundra-soil
#4
Mengting M Yuan, Jin Zhang, Kai Xue, Liyou Wu, Ye Deng, Jie Deng, Lauren Hale, Xishu Zhou, Zhili He, Yunfeng Yang, Joy D Van Nostrand, Edward A G Schuur, Konstantinos T Konstantinidis, C Ryan Penton, James R Cole, James M Tiedje, Yiqi Luo, Jizhong Zhou
Permafrost soil in high latitude tundra is one of the largest terrestrial carbon (C) stocks and is highly sensitive to climate warming. Understanding microbial responses to warming induced environmental changes are critical to evaluating their influences on soil biogeochemical cycles. In this study, a functional gene array (i.e. GeoChip 4.2) was used to analyze the functional capacities of soil microbial communities collected from a naturally degrading permafrost region in Central Alaska. Varied thaw history was reported to be the main driver of soil and plant differences across a gradient of minimally, moderately and extensively thawed sites...
July 17, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28712365/psychoneurometric-assessment-of-dispositional-liabilities-for-suicidal-behavior-phenotypic-and-etiological-associations
#5
N C Venables, J R Yancey, M D Kramer, B M Hicks, R F Krueger, W G Iacono, T E Joiner, C J Patrick
BACKGROUND: Can core genetic liabilities for suicidal behavior be indexed using psychological and neural indicators combined? The current work addressed this question by examining phenotypic and genetic associations of two biobehavioral traits, threat sensitivity (THT) and disinhibition (DIS) - operationalized as psychoneurometric variables (i.e., composites of psychological-scale and neurophysiological measures) - with suicidal behaviors in a sample of adult twins. METHODS: Participants were 444 identical and fraternal twins recruited from an urban community...
July 17, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28697783/validation-of-qtl-mapping-and-transcriptome-profiling-for-identification-of-candidate-genes-associated-with-nitrogen-stress-tolerance-in-sorghum
#6
Malleswari Gelli, Anji Reddy Konda, Kan Liu, Chi Zhang, Thomas E Clemente, David R Holding, Ismail M Dweikat
BACKGROUND: Quantitative trait loci (QTLs) detected in one mapping population may not be detected in other mapping populations at all the time. Therefore, before being used for marker assisted breeding, QTLs need to be validated in different environments and/or genetic backgrounds to rule out statistical anomalies. In this regard, we mapped the QTLs controlling various agronomic traits in a recombinant inbred line (RIL) population in response to Nitrogen (N) stress and validated these with the reported QTLs in our earlier study to find the stable and consistent QTLs across populations...
July 11, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28696249/haploinsufficiency-of-the-transcription-factor-ets-1-is-renoprotective-in-dahl-salt-sensitive-rats
#7
Wenguang Feng, Bo Chen, Dongqi Xing, Xingsheng Li, Huma Fatima, Edgar A Jaimes, Paul W Sanders
Studies using Dahl salt-sensitive (SS) rats identified specific quantitative trait loci that predispose animals to hypertension-associated albuminuria and kidney injury. We explored the hypothesis that kidney-specific expression of the transcription factor Ets-1, located within one of these loci on chromosome 8, mediates glomerular injury in SS hypertension. During the first week on a high-salt diet, SS rats and SS rats with only one functioning Ets-1 gene (ES rats) demonstrated similar increases in BP. However, serum creatinine concentration, albuminuria, and glomerular expression of ETS-1 and two ETS-1 targets, MCP-1 and MMP2, did not increase as substantially in ES rats as in SS rats...
July 10, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28693700/longitudinal-effects-of-an-intervention-on-perfectionism-in-adolescents
#8
Carmen Bento, Ana T Pereira, Carolina Roque, Jorge M Tavares Saraiva, António J Ferreira Macedo E Santos
Perfectionism is a personality disposition characterized by a person´s striving for flawlessness and the setting of excessively high performance standards. This trait has been associated with a broad range of psychopathological conditions. Consequently, prevention of its harmful effects must start early. OBJECTIVE: To investigate if one group session to manage perfectionism has the effect of reducing the levels of this trait, two and six months later. METHOD: A community-based sample of 978 Portuguese adolescents from three different high schools completed a self-reporting questionnaire including the Child and Adolescent Perfectionism Scale, before and after one skill session...
August 2017: Psicothema
https://www.readbyqxmd.com/read/28689716/exploring-physiological-plasticity-and-local-thermal-adaptation-in-an-intertidal-crab-along-a-latitudinal-cline
#9
Juan Diego Gaitán-Espitia, Leonardo D Bacigalupe, Tania Opitz, Nelson A Lagos, Sebastián Osores, Marco A Lardies
Intertidal organisms have evolved physiological mechanisms that enable them to maintain performance and survive during periods of severe environmental stress with temperatures close to their tolerance limits. The level of these adaptive responses in thermal physiology can vary among populations of broadly distributed species depending on their particular environmental context and genetic backgrounds. Here we examined thermal performances and reaction norms for metabolic rate (MR) and heart rate (HR) of seven populations of the porcelanid crab Petrolisthes violaceus from markedly different thermal environments across the latitudinal gradient of ~3000km...
August 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28678890/platinum-sensitive-2-like-impacts-growth-root-morphology-seed-set-and-stress-responses
#10
Amr R A Kataya, Maria T Creighton, Toga P Napitupulu, Christine Sætre, Behzad Heidari, Peter Ruoff, Cathrine Lillo
Eukaryotic protein phosphatase 4 (PP4) is a PP2A-type protein phosphatase that is part of a conserved complex with regulatory factors PSY2 and PP4R2. Various lines of Arabidopsis thaliana with mutated PP4 subunit genes were constructed to study the so far completely unknown functions of PP4 in plants. Mutants with knocked out putative functional homolog of the PSY2 LIKE (PSY2L) gene were dwarf and bushy, while plants with knocked out PP4R2 LIKE (PP4R2L) looked very similar to WT. The psy2l seedlings had short roots with disorganized morphology and impaired meristem...
2017: PloS One
https://www.readbyqxmd.com/read/28676806/effects-of-drought-stress-on-pollen-sterility-grain-yield-abscisic-acid-and-protective-enzymes-in-two-winter-wheat-cultivars
#11
Baodi Dong, Xin Zheng, Haipei Liu, Jason A Able, Hong Yang, Huan Zhao, Mingming Zhang, Yunzhou Qiao, Yakai Wang, Mengyu Liu
Drought stress induced pollen sterility is a detrimental factor reducing grain number in wheat. Exploring the mechanisms underlying pollen fertility under drought conditions could assist breeding high-yielding wheat cultivars with stress tolerance. Here, by using two Chinese wheat cultivars subjected to different levels of polyethylene glycol (PEG)-induced drought stress, possible links between pollen fertility and stress tolerance were analyzed under different levels of drought stress at the young microspore stage...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28662183/rpos-role-in-virulence-and-fitness-in-enteropathogenic-escherichia-coli
#12
Gardênia Márcia Silva Campos Mata, Gerson Moura Ferreira, Beny Spira
Enteropathogenic Escherichia coli (EPEC) is a diarrheagenic pathogen that afflicts infants in developing countries. The most important virulence trait of EPEC is its ability to intimately adhere to cells in the small intestine, and to elicit diarrhea. The alternative sigma factor RpoS is involved in the virulence of several bacterial species. RpoS coordinates the general stress response and accumulates in cells under stress or in the stationary phase. RpoS levels differ across E. coli strains. High-RpoS strains are highly resistant to environmental stresses, but usually display low nutritional competence, while low-RpoS strains show the opposite phenotype...
2017: PloS One
https://www.readbyqxmd.com/read/28659966/local-populations-of-arabidopsis-thaliana-show-clear-relationship-between-photoperiodic-sensitivity-of-flowering-time-and-altitude
#13
Anna M Lewandowska-Sabat, Siri Fjellheim, Jorunn E Olsen, Odd A Rognli
Adaptation of plants to local conditions that vary substantially within their geographic range is essential for seasonal timing of flowering, a major determinant of plant reproductive success. This study investigates photoperiodic responses in natural populations of Arabidopsis thaliana from high northern latitudes and their significance for local adaptation. Thirty lineages from ten local A. thaliana populations, representing different locations across an altitudinal gradient (2-850 m a.s.l.) in Norway, were grown under uniform controlled conditions, and used to screen for responses to five different photoperiods...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28659866/overlapping-neural-endophenotypes-in-addiction-and-obesity
#14
REVIEW
Andréanne Michaud, Uku Vainik, Isabel Garcia-Garcia, Alain Dagher
Impulsivity refers to a tendency to act rapidly without full consideration of consequences. The trait is thought to result from the interaction between high arousal responses to potential rewards and poor self-control. Studies have suggested that impulsivity confers vulnerability to both addiction and obesity. However, results in this area are unclear, perhaps due to the high phenotypic complexity of addictions and obesity. Focusing on impulsivity, the aim of this review is to tackle the putative overlaps between addiction and obesity in four domains: (1) personality research, (2) neurocognitive tasks, (3) brain imaging, and (4) clinical evidence...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28651543/profiling-of-drought-responsive-microrna-and-mrna-in-tomato-using-high-throughput-sequencing
#15
Minmin Liu, Huiyang Yu, Gangjun Zhao, Qiufeng Huang, Yongen Lu, Bo Ouyang
BACKGROUND: Abiotic stresses cause severe loss of crop production. Among them, drought is one of the most frequent environmental stresses, which limits crop growth, development and productivity. Plant drought tolerance is fine-tuned by a complex gene regulatory network. Understanding the molecular regulation of this polygenic trait is crucial for the eventual success to improve plant yield and quality. Recent studies have demonstrated that microRNAs play critical roles in plant drought tolerance...
June 26, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28648998/physiological-traits-and-mn-transporter-genes-expression-in-ryegrass-genotypes-under-increasing-mn-at-short-term
#16
Marjorie Reyes-Díaz, Claudio Inostroza-Blancheteau, Graciela Berríos, Mariana Deppe, Rolando Demanet, Miren Alberdi
We studied physiological traits and Mn transporter genes expression in ryegrass genotypes (One-50, Banquet-II, Halo-AR1 and Nui) under increasing Mn (2.4-750 μM) at short-term (8-24 h) in nutrient solution. An increment in Mn concentration occurred early in roots of all genotypes at increased Mn doses relative to control. Banquet-II and Nui roots showed the greatest Mn concentration at the highest Mn supply. Net photosynthesis (Pn) of Banquet-II and Halo-AR1 were not perturbed by Mn doses, whereas One-50 and Nui, decayed strongly at the highest Mn dose, concomitant with reduced total chlorophyll concentration...
June 17, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28647567/stearoyl-coa-desaturase-regulates-sorafenib-resistance-via-modulation-of-er-stress-induced-differentiation
#17
Mark Kin Fai Ma, Eunice Yuen Ting Lau, Doris Hoi Wing Leung, Jessica Lo, Nicole Pui Yu Ho, Lily Kwan Wai Cheng, Stephanie Ma, Chi Ho Lin, John A Copland, Jin Ding, Regina Cheuk Lam Lo, Irene Oi Lin Ng, Terence Kin Wah Lee
BACKGROUND & AIMS: We investigated the functional role and clinical significance of Stearoyl CoA desaturase-1 (SCD1) mediated endoplasmic reticulum (ER) stress in regulation of liver tumor-initiating cells (T-ICs) and sorafenib resistance, aiming to develop a novel therapeutic strategy against hepatocellular carcinomas (HCCs) METHODS: We evaluated the clinic-pathological relevance of SCD1 and its correlation with sorafenib resistance in large cohorts of HCC clinical samples by qPCR and immunohistochemical analyses...
June 22, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28643848/the-impact-of-alternative-trait-scaling-hypotheses-for-the-maximum-photosynthetic-carboxylation-rate-vcmax-on-global-gross-primary-production
#18
Anthony P Walker, Tristan Quaife, Peter M van Bodegom, Martin G De Kauwe, Trevor F Keenan, Joanna Joiner, Mark R Lomas, Natasha MacBean, Chongang Xu, Xiaojuan Yang, F Ian Woodward
The maximum photosynthetic carboxylation rate (Vcmax ) is an influential plant trait that has multiple scaling hypotheses, which is a source of uncertainty in predictive understanding of global gross primary production (GPP). Four trait-scaling hypotheses (plant functional type, nutrient limitation, environmental filtering, and plant plasticity) with nine specific implementations were used to predict global Vcmax distributions and their impact on global GPP in the Sheffield Dynamic Global Vegetation Model (SDGVM)...
June 23, 2017: New Phytologist
https://www.readbyqxmd.com/read/28639691/distinct-controls-of-leaf-widening-and-elongation-by-light-and-evaporative-demand-in-maize
#19
Sebastien Lacube, Christian Fournier, Carine Palaffre, Emilie J Millet, François Tardieu, Boris Parent
Leaf expansion depends on both carbon and water availabilities. In cereals, most of experimental effort has focused on leaf elongation, with essentially hydraulic effects. We have tested if evaporative demand and light could have distinct effects on leaf elongation and widening, and if short term effects could translate into final leaf dimensions. For that, we have monitored leaf widening and elongation in a field experiment with temporary shading, and in a platform experiment with 15-min temporal resolution and contrasting evaporative demands...
June 22, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28638437/a-multiplex-pcr-for-rapid-identification-of-brassica-species-in-the-triangle-of-u
#20
Joshua C O Koh, Denise M Barbulescu, Sally Norton, Bob Redden, Phil A Salisbury, Sukhjiwan Kaur, Noel Cogan, Anthony T Slater
BACKGROUND: Within the Brassicaceae, six species from the genus Brassica are widely cultivated throughout the world as oilseed, condiment, fodder or vegetable crops. The genetic relationships among the six Brassica species are described by U's triangle model. Extensive shared traits and diverse morphotypes among Brassica species make identification and classification based on phenotypic data alone challenging and unreliable, especially when dealing with large germplasm collections. Consequently, a major issue for genebank collections is ensuring the correct identification of species...
2017: Plant Methods
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