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https://www.readbyqxmd.com/read/28210247/genome-insight-and-comparative-pathogenomic-analysis-of-nesterenkonia-jeotgali-strain-cd08_7-isolated-from-duodenal-mucosa-of-celiac-disease-patient
#1
Atul M Chander, Ramesan G Nair, Gurwinder Kaur, Rakesh Kochhar, Devinder K Dhawan, Sanjay K Bhadada, Shanmugam Mayilraj
Species of the genus Nesterenkonia have been isolated from different ecological niches, especially from saline habitats and reported as weak human pathogens causing asymptomatic bacteraemia. Here, for the first time we are reporting the genome sequence and pathogenomic analysis of a strain designated as CD08_7 isolated from the duodenal mucosa of a celiac disease patient, identified as Nesterenkonia jeotgali. To date, only five strains of the genus Nesterenkonia (N. massiliensis strain NP1(T), Nesterenkonia sp...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28209457/metabolomic-approach-reveals-the-biochemical-mechanisms-underlying-drought-stress-tolerance-in-thyme
#2
Parviz Moradi, Brian Ford-Lloyd, Jeremy Pritchard
Thyme as a perennial herb has been recognized globally for its antimicrobial, antiseptic and spasmolytic effects. In this investigation, we have used non-targeted metabolite and volatile profiling combined with the morpho-physiological parameters in order to understand the responses at the metabolite and physiological level in drought sensitive and tolerant thyme plant populations. The results at the metabolic level identified the significantly affected metabolites. Significant metabolites belonging to different chemical classes consisting amino acids, carbohydrates, organic acids and lipids have been compared in tolerant and sensitive plants...
February 13, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28207772/triticum-aestivum-wrab18-functions-in-plastids-and-confers-abiotic-stress-tolerance-when-overexpressed-in-escherichia-coli-and-nicotiania-benthamiana
#3
Xiaoyu Wang, Linsheng Zhang, Yane Zhang, Zhenqing Bai, Hao Liu, Dapeng Zhang
WRAB18, an ABA-inducible protein belongs to the third family of late embryogenesis abundant (LEA) proteins which can be induced by different biotic or abiotic stresses. In the present study, WRAB18 was cloned from the Zhengyin 1 cultivar of Triticum aestivum and overexpressed in Escherichia coli to explore its effects on the growth of E. coli under different abiotic stresses. Results suggested the enhanced exhibition of tolerance of E. coli to these stresses. Meanwhile, the WRAB18-transgenic tobacco plants were obtained to analyze the stress-related enzymatic activities of ascorbate peroxidase (APX), peroxidase (POD) and superoxide dismutase (SOD), and to quantify the content of malonaldehyde (MDA) under osmotic stress, high salinity, and low and high temperature stress...
2017: PloS One
https://www.readbyqxmd.com/read/28193207/a-novel-point-mutation-in-rpob-improves-osmotolerance-and-succinic-acid-production-in-escherichia-coli
#4
Mengyong Xiao, Xinna Zhu, Hongtao Xu, Jinlei Tang, Ru Liu, Changhao Bi, Feiyu Fan, Xueli Zhang
BACKGROUND: Escherichia coli suffer from osmotic stress during succinic acid (SA) production, which reduces the performance of this microbial factory. RESULTS: Here, we report that a point mutation leading to a single amino acid change (D654Y) within the β-subunit of DNA-dependent RNA polymerase (RpoB) significantly improved the osmotolerance of E. coli. Importation of the D654Y mutation of RpoB into the parental strain, Suc-T110, increased cell growth and SA production by more than 40% compared to that of the control under high glucose osmolality...
February 13, 2017: BMC Biotechnology
https://www.readbyqxmd.com/read/28189051/changes-in-root-hydraulic-conductivity-facilitate-the-overall-hydraulic-response-of-rice-oryza-sativa-l-cultivars-to-salt-and-osmotic-stress
#5
Delong Meng, Wieland Fricke
The aim of the present work was to assess the significance of changes in root AQP gene expression and hydraulic conductivity (Lp) in the regulation of water balance in two hydroponically-grown rice cultivars (Azucena, Bala) which differ in root morphology, stomatal regulation and aquaporin (AQP) isoform expression. Plants were exposed to NaCl (25 mM, 50 mM) and osmotic stress (5%, 10% PEG6000). Root Lp was determined for exuding root systems (osmotic forces driving water uptake; 'exudation Lp') and transpiring plants (hydrostatic forces dominating; 'transpiration-Lp')...
February 2, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28187710/ionomic-and-metabolic-responses-to-neutral-salt-or-alkaline-salt-stresses-in-maize-zea-mays-l-seedlings
#6
Rui Guo, LianXuan Shi, Changrong Yan, Xiuli Zhong, FengXue Gu, Qi Liu, Xu Xia, Haoru Li
BACKGROUND: Soil salinity and alkalinity present a serious threat to global agriculture. However, most of the studies have focused on neutral salt stress, and the information on the metabolic responses of plants to alkaline salt stress is limited. This investigation aimed at determining the influence of neutral salt and alkaline salt stresses on the content of metal elements and metabolites in maize plant tissues, by using mixtures of various proportions of NaCl, NaHCO3, Na2SO4, and Na2CO3...
February 10, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28184229/bnsip1-1-a-trihelix-family-gene-mediates-abiotic-stress-tolerance-and-aba-signaling-in-brassica-napus
#7
Junling Luo, Shaohua Tang, Fengling Mei, Xiaojue Peng, Jun Li, Xiaofei Li, Xiaohong Yan, Xinhua Zeng, Fang Liu, Yuhua Wu, Gang Wu
The trihelix family genes have important functions in light-relevant and other developmental processes, but their roles in response to adverse environment are largely unclear. In this study, we identified a new gene, BnSIP1-1, which fell in the SIP1 (6b INTERACTING PROTEIN1) clade of the trihelix family with two trihelix DNA binding domains and a fourth amphipathic α-helix. BnSIP1-1 protein specifically targeted to the nucleus, and its expression can be induced by abscisic acid (ABA) and different stresses...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28183059/copper-induced-metabolic-variation-of-oysters-overwhelmed-by-salinity-effects
#8
Chen Cao, Wen-Xiong Wang
In estuarine environments, Cu (copper) contamination is simultaneously coupled with salinity variation. In this study, (1)H NMR was applied to investigate the metabolic disturbance of estuarine oysters Crassostrea hongkongensis under both Cu and salinity stresses. Oysters were exposed to dissolved Cu (50 μg L(-1)) at different salinities (10, 15 and 25 psu) for six weeks, and the Cu accumulation in the oyster tissues was higher at lowered salinity. Based on the NMR-metabolomics results, disturbances induced by Cu and salinity was mainly related to osmotic regulation, energy metabolism and glycerophospholipid metabolism, as indicated by the alteration of important metabolic biomarkers such as alanine, citrate, glucose, glycogen, betaine, taurine, hypotaurine and homarine in the gills...
February 1, 2017: Chemosphere
https://www.readbyqxmd.com/read/28181575/mycorrhizas-alter-sucrose-and-proline-metabolism-in-trifoliate-orange-exposed-to-drought-stress
#9
Hui-Hui Wu, Ying-Ning Zou, Mohammed Mahabubur Rahman, Qiu-Dan Ni, Qiang-Sheng Wu
Arbuscular mycorrhizal fungi (AMF) can enhance drought tolerance in plants, whereas little is known regarding AMF contribution to sucrose and proline metabolisms under drought stress (DS). In this study, Funneliformis mosseae and Paraglomus occultum were inoculated into trifoliate orange (Poncirus trifoliata) under well watered and DS. Although the 71-days DS notably (P < 0.05) inhibited mycorrhizal colonization, AMF seedlings showed significantly (P < 0.05) higher plant growth performance and leaf relative water content, regardless of soil water status...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28181537/analysis-of-drought-responsive-signalling-network-in-two-contrasting-rice-cultivars-using-transcriptome-based-approach
#10
Pratikshya Borah, Eshan Sharma, Amarjot Kaur, Girish Chandel, Trilochan Mohapatra, Sanjay Kapoor, Jitendra P Khurana
Traditional cultivars of rice in India exhibit tolerance to drought stress due to their inherent genetic variations. Here we present comparative physiological and transcriptome analyses of two contrasting cultivars, drought tolerant Dhagaddeshi (DD) and susceptible IR20. Microarray analysis revealed several differentially expressed genes (DEGs) exclusively in DD as compared to IR20 seedlings exposed to 3 h drought stress. Physiologically, DD seedlings showed higher cell membrane stability and differential ABA accumulation in response to dehydration, coupled with rapid changes in gene expression...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28181485/high-throughput-single-cell-analysis-for-the-proteomic-dynamics-study-of-the-yeast-osmotic-stress-response
#11
Rongfei Zhang, Haiyu Yuan, Shujing Wang, Qi Ouyang, Yong Chen, Nan Hao, Chunxiong Luo
Motorized fluorescence microscopy combined with high-throughput microfluidic chips is a powerful method to obtain information about different biological processes in cell biology studies. Generally, to observe different strains under different environments, high-throughput microfluidic chips require complex preparatory work. In this study, we designed a novel and easily operated high-throughput microfluidic system to observe 96 different GFP-tagged yeast strains in one switchable culture condition or 24 different GFP-tagged yeast strains in four parallel switchable culture conditions...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28181434/equilibrium-denaturation-and-preferential-interactions-of-an-rna-tetraloop-with-urea
#12
Jacob C Miner, Angel E García
Urea is an important organic cosolute with implications in maintaining osmotic stress in cells and differentially stabilizing ensembles of folded biomolecules. We report an equilibrium study of urea-induced denaturation of a hyperstable RNA tetraloop through unbiased replica exchange molecular dynamics. We find that, in addition to destabilizing the folded state, urea smooths the RNA free energy landscape by destabilizing specific configurations, and forming favorable interactions with RNA nucleobases. A linear concentration-dependence of the free energy (m-value) is observed, in agreement with the results of other RNA hairpins and proteins...
February 16, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28178573/enhancement-of-cold-and-salt-tolerance-of-arabidopsis-by-transgenic-expression-of-the-s-adenosylmethionine-decarboxylase-gene-from-leymus-chinensis
#13
Zhujiang Liu, Panpan Liu, Dongmei Qi, Xianjun Peng, Gongshe Liu
Leymus chinensis is an important perennial forage grass natively distributed in the Eurasian Steppe. However, little is known about the molecular mechanism of its adaptation to extreme environmental conditions. Based on L. chinensis cold-treated sequence database, a highly expressed S-adenosylmethionine decarboxylase gene (LcSAMDC1) was isolated from L. chinensis. Gene structure analysis showed that LcSAMDC1 has two introns and three exons as well as three non-overlapping ORFs in its mRNA sequence. One hour of cold exposure caused a significant up-regulation of LcSAMDC1, while abscisic acid (ABA), salt, and osmotic stresses slightly induced its expression...
January 19, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28174682/glucose-deprivation-regulates-the-progranulin-sortilin-axis-in-pc12-cells
#14
Ken-Ichi Kawashima, Yuri Ishiuchi, Miki Konnai, Saori Komatsu, Hitoshi Sato, Hideo Kawaguchi, Nobumitsu Miyanishi, Jérôme Lamartine, Masugi Nishihara, Taku Nedachi
Progranulin (PGRN) is a growth factor implicated in several neurodegenerative diseases, such as frontotemporal lobar degeneration. Despite its important role in the central nervous system (CNS), the mechanisms controlling PGRN expression in the CNS are largely unknown. Recent evidence, however, suggested that several stressors, such as hypoxia, acidosis, or oxidative stress, induce PGRN expression. The present study was mainly aimed at determining whether and, if so, how glucose deprivation affects PGRN expression in PC12 cells...
February 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/28167518/pleiotropic-regulation-of-virulence-genes-in-streptococcus-mutans-by-a-conserved-small-protein-sprv
#15
Manoharan Shankar, Mohammad S Hossain, Indranil Biswas
: Streptococcus mutans, an oral pathogen associated with dental caries, colonizes tooth surfaces as polymicrobial biofilms, known as dental plaque. S. mutans expresses several virulence factors that allow the organism to tolerate environmental fluctuations and to compete with other microorganisms. We recently identified that a small hypothetical protein (90 amino acids) was essential for normal growth of the bacterium. Inactivation of the gene SMU.2137 encoding this protein caused a significant growth defect and loss of various virulence-associated functions...
February 6, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28167039/apple-autophagy-related-protein-mdatg3s-afford-tolerance-to-multiple-abiotic-stresses
#16
Ping Wang, Xun Sun, Xin Jia, Fengwang Ma
The efficient degradation system of autophagy in plant cells has important roles in removing and recycling intracellular components during normal development or under environmental stresses. Formation of autophagosomes requires the conjugation of ubiquitin-like protein ATG8 to phosphatidylethanolamine (PE). We isolated two ubiquitin-conjugating enzyme E2-like ATG3 homologues from Malus domestica - MdATG3a and MdATG3b - that are crucial for ATG8-PE conjugation. Both share a conserved N-terminal, as well as the catalytic and C-terminal domains of ATG3 with HPC and FLKF motifs...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28167033/combined-elevated-temperature-and-soil-waterlogging-stresses-inhibit-cell-elongation-by-altering-osmolyte-composition-of-the-developing-cotton-gossypium-hirsutum-l-fiber
#17
Yinglong Chen, Haimiao Wang, Wei Hu, Shanshan Wang, Youhua Wang, John L Snider, Zhiguo Zhou
Soil waterlogging events and high temperature conditions occur frequently in the Yangtze River Valley, yet the effects of these co-occurring stresses on fiber elongation have received little attention. In the current study, the combined effect of elevated temperature (ET) and soil waterlogging (SW) more negatively affected final fiber length (reduced by 5.4%-11.3%) than either stress alone by altering the composition of osmotically active solutes (sucrose, malate, and K(+)), where SW had the most pronounced effect...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28166192/insulin-like-signalling-to-the-maternal-germline-controls-progeny-response-to-osmotic-stress
#18
Nicholas O Burton, Tokiko Furuta, Amy K Webster, Rebecca E W Kaplan, L Ryan Baugh, Swathi Arur, H Robert Horvitz
In 1893 August Weismann proposed that information about the environment could not pass from somatic cells to germ cells, a hypothesis now known as the Weismann barrier. However, recent studies have indicated that parental exposure to environmental stress can modify progeny physiology and that parental stress can contribute to progeny disorders. The mechanisms regulating these phenomena are poorly understood. We report that the nematode Caenorhabditis elegans can protect itself from osmotic stress by entering a state of arrested development and can protect its progeny from osmotic stress by increasing the expression of the glycerol biosynthetic enzyme GPDH-2 in progeny...
February 6, 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28164334/ethylene-response-factor-74-erf74-plays-an-essential-role-in-controlling-a-respiratory-burst-oxidase-homolog-d-rbohd-dependent-mechanism-in-response-to-different-stresses-in-arabidopsis
#19
Yuan Yao, Run Jun He, Qiao Li Xie, Xian Hai Zhao, Xiao Mei Deng, Jun Bo He, Lili Song, Jun He, Alan Marchant, Xiao-Yang Chen, Ai-Min Wu
Recent studies indicate that the ETHYLENE RESPONSE FACTOR VII (ERF-VII) transcription factor is an important regulator of osmotic and hypoxic stress responses in plants. However, the molecular mechanism of ERF-VII-mediated transcriptional regulation remains unclear. Here, we investigated the role of ERF74 (a member of the ERF-VII protein family) by examining the abiotic stress tolerance of an ERF74 overexpression line and a T-DNA insertion mutant using flow cytometry, transactivation and electrophoretic mobility shift assays...
March 2017: New Phytologist
https://www.readbyqxmd.com/read/28158274/alterations-of-erythrocyte-rheology-and-cellular-susceptibility-in-end-stage-renal-disease-effects-of-peritoneal-dialysis
#20
Nesrin Zeynep Ertan, Semra Bozfakioglu, Elif Ugurel, Mukaddes Sinan, Ozlem Yalcin
In this study, we investigated the effects of peritoneal dialysis on hemorheological and hematological parameters and their relations with oxidant and antioxidant status of uremic patients. Hemorheological parameters (erythrocyte deformability, erythrocyte aggregation, osmotic deformability, blood and plasma viscosity) were measured in patients with renal insufficiency undergoing peritoneal dialysis (PD) and volunteers. Erythrocyte deformability, osmotic deformability and aggregation in both autologous plasma and 3% dextran 70 were measured by laser diffraction ektacytometry...
2017: PloS One
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