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https://www.readbyqxmd.com/read/28734247/seasonal-variation-in-water-uptake-patterns-of-three-plant-species-based-on-stable-isotopes-in-the-semi-arid-loess-plateau
#1
Jian Wang, Bojie Fu, Nan Lu, Li Zhang
Water is a limiting factor and significant driving force for ecosystem processes in arid and semi-arid areas. Knowledge of plant water uptake pattern is indispensable for understanding soil-plant interactions and species coexistence. The 'Grain for Green' project that started in 1999 in the Loess Plateau of China has led to large scale vegetation change. However, little is known about the water uptake patterns of the main plant species that inhabit in this region. In this study, the seasonal variations in water uptake patterns of three representative plant species, Stipa bungeana, Artemisia gmelinii and Vitex negundo, that are widely distributed in the semi-arid area of the Loess Plateau, were identified by using dual stable isotopes of δ(2)H and δ(18)O in plant and soil water coupled with a Bayesian mixing model MixSIAR...
July 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28734223/differential-effects-of-citric-acid-on-cadmium-uptake-and-accumulation-between-tall-fescue-and-kentucky-bluegrass
#2
ShuTing Wang, Qin Dong, ZhaoLong Wang
Organic acids play an important role in cadmium availability, uptake, translocation, and detoxification. A sand culture experiment was designed to investigate the effects of citric acid on Cd uptake, translocation, and accumulation in tall fescue and Kentucky bluegrass. The results showed that two grass species presented different Cd chemical forms, organic acid components and amount in roots. The dormant Cd accumulated in roots of tall fescue was the pectate- and protein- integrated form, which contributed by 84...
July 19, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28734213/enhanced-cadmium-phytoremediation-of-glycine-max-l-through-bioaugmentation-of-cadmium-resistant-bacteria-assisted-by-biostimulation
#3
Pongsarun Rojjanateeranaj, Chirawee Sangthong, Benjaphorn Prapagdee
This study examined the potential of three strains of cadmium-resistant bacteria, including Micrococcus sp., Pseudomonas sp. and Arthrobacter sp., to promote root elongation of Glycine max L. seedlings, soil cadmium solubility and cadmium phytoremediation in G. max L. planted in soil highly polluted with cadmium with and without nutrient biostimulation. Micrococcus sp. promoted root length in G. max L. seedlings under toxic cadmium conditions. Soil inoculation with Arthrobacter sp. increased the bioavailable fraction of soil cadmium, particularly in soil amended with a C:N ratio of 20:1...
July 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28734208/effect-of-mutation-on-a%C3%AE-1-42-heme-complex-in-aggregation-mechanism-alzheimer-s-disease
#4
Subramaniam Boopathi, Ponmalai Kolandaivel
Amyloid β (Aβ) peptide aggregation is one of the root causes for Alzheimer's disease. Recently, experimental studies show that three active binding sites (His6, His13 and His14) of Aβ peptides were bound with heme to form Aβ-Heme complex, which leads to inhibit the aggregation process. We apply molecular dynamic simulation to investigate the aggregation pathways of Aβ-Heme peptides. The above three binding sites were mutated by Glycine residue individually and generate three complex systems such as Aβ(His6Gly)-Heme, Aβ(His13Gly)-Heme and Aβ(His14Gly)-Heme...
July 8, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28734206/theoretical-investigation-of-the-conformational-space-of-baicalin
#5
Juan J Martínez Medina, Evelina G Ferrer, Patricia A M Williams, Nora B Okulik
Flavonoids are a large group of polyphenolic compounds ubiquitously present in plants. They are important components of human diet. They are recognized as potential drug candidates to be used in the treatment and prevention of a lot of pathological disorders, due to their protective effects. Baicalin (7-glucuronic acid 5, 6-dihydroxyflavone) is one of the main single active constituents isolated from the dried roots of Scutellaria baicalensis Georgi. The great interest on this flavonoid is due to its various pharmacological properties, such as antioxidant, antimicrobial, anti-inflammatory, anticancer and so on, and its high accumulation in the roots of S...
July 11, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28734161/evaluation-of-the-effect-of-extraction-solvent-and-organ-selection-on-the-chemical-profile-of-astragalus-spinosus-using-hptlc-multivariate-image-analysis
#6
Eman Shawky, Dina A Selim
The evaluation of extraction protocols for untargeted and targeted metabolomics was implemented for root and aerial organs of Astragalus spinosus in this work. The efficiency and complementarity of commonly used extraction solvents, namely petroleum ether, methylene chloride, ethyl acetate and n-butanol were considered for method evaluation using chemometric techniques in conjunction with new, simple, and fast high performance thin layer chromatography (HPTLC) method for fingerprint analysis by extracting information from a digitalized HPTLC plate using ImageJ software...
July 15, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28734115/regularized-estimation-in-sparse-high-dimensional-multivariate-regression-with-application-to-a-dna-methylation-study
#7
Haixiang Zhang, Yinan Zheng, Grace Yoon, Zhou Zhang, Tao Gao, Brian Joyce, Wei Zhang, Joel Schwartz, Pantel Vokonas, Elena Colicino, Andrea Baccarelli, Lifang Hou, Lei Liu
In this article, we consider variable selection for correlated high dimensional DNA methylation markers as multivariate outcomes. A novel weighted square-root LASSO procedure is proposed to estimate the regression coefficient matrix. A key feature of this method is tuning-insensitivity, which greatly simplifies the computation by obviating cross validation for penalty parameter selection. A precision matrix obtained via the constrained ℓ1 minimization method is used to account for the within-subject correlation among multivariate outcomes...
July 26, 2017: Statistical Applications in Genetics and Molecular Biology
https://www.readbyqxmd.com/read/28732405/increased-n2o-emission-by-inhibited-plant-growth-in-the-co2-leaked-soil-environment-simulation-of-co2-leakage-from-carbon-capture-and-storage-ccs-site
#8
You Jin Kim, Wenmei He, Daegeun Ko, Haegeun Chung, Gayoung Yoo
Atmospheric carbon dioxide (CO2) concentrations is continuing to increase due to anthropogenic activity, and geological CO2 storage via carbon capture and storage (CCS) technology can be an effective way to mitigate global warming due to CO2 emission. However, the possibility of CO2 leakage from reservoirs and pipelines exists, and such leakage could negatively affect organisms in the soil environment. Therefore, to determine the impacts of geological CO2 leakage on plant and soil processes, we conducted a greenhouse study in which plants and soils were exposed to high levels of soil CO2...
July 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28732361/morusin-inhibits-cell-proliferation-and-tumor-growth-by-downregulating-c-myc-in-human-gastric-cancer
#9
Feng Wang, Dunke Zhang, Jingxin Mao, Xiao-Xue Ke, Rui Zhang, Chao Yin, Ning Gao, Hongjuan Cui
Morusin is a pure extract from the root bark of Morus australis (Moraceae). In recent years, morusin has been reported to exhibit anti-tumor biological activity in some types of human cancers through different mechanisms. Here, we attempted to investigate the inhibitory effect and mechanism of morusin on gastric cancer. Morusin markedly inhibited gastric cancer cell proliferation by down-regulating CDKs and Cyclins, such as CDK2, CDK4, Cyclin D1 and Cyclin E1. Additionally, morusin suppressed tumor growth in vitro and in vivo...
July 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/28732300/complete-torsion-of-gallbladder-following-laparoscopic-cholecystectomy-a-case-study
#10
Tomoaki Bekki, Tomoyuki Abe, Hironobu Amano, Nobuaki Fujikuni, Hiroshi Okuda, Tatsunari Sasada, Minoru Yamaki, Tsuyoshi Kobayashi, Toshio Noriyuki, Masahiro Nakahara
INTRODUCTION: Gallbladder torsion is mainly associated with a floating gallbladder. From an anatomical perspective, laparoscopic cholecystectomy is a more optimal treatment than open cholecystectomy. PRESENTATION OF CASE: An 84-year-old woman visited the Onomichi General Hospital because of progressive pain in the right upper quadrant of her abdomen. Physical examination revealed a positive Murphy sign and peritoneal irritation. Laboratory data demonstrated that inflammatory marker levels were increased...
June 29, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28732267/understanding-the-holobiont-the-interdependence-of-plants-and-their-microbiome
#11
REVIEW
Carmen Sánchez-Cañizares, Beatriz Jorrín, Philip S Poole, Andrzej Tkacz
The holobiont is composed by the plant and its microbiome. In a similar way to ecological systems of higher organisms, the holobiont shows interdependent and complex dynamics [1,2]. While plants originate from seeds, the microbiome has a multitude of sources. The assemblage of these communities depends on the interaction between the emerging seedling and its surrounding environment, with soil being the main source. These microbial communities are controlled by the plant through different strategies, such as the specific profile of root exudates and its immune system...
July 18, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/28732263/proteomic-analysis-of-naturally-occurring-boron-tolerant-plant-gypsophila-sphaerocephala-l-in-response-to-high-boron-concentration
#12
Huseyin Tombuloglu, Guzin Tombuloglu, Mehmet Serdal Sakcali, Ali Turkan, Khalid Rehman Hakeem, Hesham F Alharby, Shah Fahd, Waseem Mohammed Abdul
Gypsophila sphaerocephala is a naturally Boron (B) tolerant species that can grow around the B mining areas in Turkey, where the B concentration in soil reaches a lethal dose for plants (up to ∼8900mgkg(-1) (∼140mM). While its interesting survival capacity in extremely B containing soils, any molecular research has been conducted to understand its high tolerance mechanism yet. In the present study, we have performed a proteomic analysis of this plant to understand its high tolerance towards B-stress. Seedlings of G...
July 4, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28732175/genome-wide-identification-functional-prediction-and-evolutionary-analysis-of-r2r3-myb-superfamily-in-brassica-napus
#13
Ali Hajiebrahimi, Hajar Owji, Shiva Hemmati
R2R3-MYBs are important transcription factors (TFs) in planta, involved in development and various stress conditions. Phylogenetic analysis showed the presence of 249 R2R3-MYB TFs in Brassica napus called BnaR2R3-MYBs, clustered into 38 clades. BnaR2R3-MYBs were distributed on 19 chromosomes of B. napus. Sixteen gene clusters were identified. BnaR2R3-MYBs were characterized by motif prediction, gene structure analysis and gene ontology. Evolutionary analysis revealed that BnaR2R3-MYBs are mainly formed as a result of whole genome duplication...
July 21, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/28732146/medicago-truncatula-zinc-iron-permease6-provides-zinc-to-rhizobia-infected-nodule-cells
#14
Isidro Abreu, Ángela Saéz, Rosario Castro-Rodríguez, Viviana Escudero, Benjamín Rodríguez-Haas, Marta Senovilla, Camille Larue, Daniel Grolimund, Manuel Tejada-Jiménez, Juan Imperial, Manuel González-Guerrero
Zinc is a micronutrient required for symbiotic nitrogen fixation. It has been proposed that in model legume Medicago truncatula, zinc is delivered by the root vasculature into the nodule and released in the infection/differentiation zone. There, transporters must introduce this element into rhizobia-infected cells to metallate the apoproteins that use zinc as a cofactor. MtZIP6 (Medtr4g083570) is a M. truncatula Zinc-Iron Permease (ZIP) that is expressed only in roots and nodules, with the highest expression levels in the infection/differentiation zone...
July 21, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28732144/influence-of-high-latitude-light-conditions-on-sensory-quality-and-contents-of-health-and-sensory-related-compounds-in-swede-roots-brassica-napus-l-ssp-rapifera-metzg
#15
Jørgen A B Mølmann, Sidsel Fiskaa Hagen, Gunnar B Bengtsson, Tor J Johansen
BACKGROUND: Vegetable growers in Arctic areas usually must rely on market strategies based on regional origin and product quality. Swede roots (rutabaga) were grown in a phytotron to investigate the effect of high latitude light conditions on sensory quality and some health and sensory-related compounds. Experimental treatments included modifications of 24 h natural day length (69° 39' N), by moving plants at daily intervals to dark chambers with either no light, fluorescent growth light and/or low intensity photoperiod extension...
July 21, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28732041/understanding-russell-s-viper-venom-factor-v-activator-s-substrate-specificity-by-surface-plasmon-resonance-and-in-silico-studies
#16
Pradeep K Yadav, Christian B Antonyraj, Syed Ibrahim Basheer Ahamed, Sistla Srinivas
Blood coagulation factor V (FV) is activated either by Factor X or thrombin, cleaving at three different sites viz., Site I (Arg709-Ser710), site II (Arg1018-Thr1019), and site III (Arg1545-Ser1546). Russell's viper venom factor V activator (RVV-V) is a thrombin-like serine proteinase that activates FV with selective, single cleavage at site III. A long lasting effort is being pending in understanding the 'selective' binding specificity of the RVV-V towards site III. Here, we present the binding kinetic study of RVV-V with two designed peptides corresponding to the regions from site I (Gln699-Asn713) and site II (1008Lys-Pro1022), respectively, that include 15 amino acids...
2017: PloS One
https://www.readbyqxmd.com/read/28731986/the-effect-of-sex-on-heart-rate-variability-at-high-altitude
#17
Christopher John Boos, Emma Vincent, Adrian Mellor, John O'Hara, Caroline Newman, Richard Cruttenden, Phylip Scott, Mark Cooke, Jamie Matu, David Richard Woods
There is evidence to suggest that high altitude (HA) exposure leads to a fall in heart rate variability (HRV) that is linked to the development of acute mountain sickness (AMS). The effects of sex on changes in HRV at HA and its relationship to AMS are unknown. METHODS: HRV (5-minute single lead ECG) was measured in 63 healthy adults (41 men and 22 women) aged 18-56 years at sea level (SL) and during a HA trek at 3619m, 4600m and 5140m respectively. The main effects of altitude (SL, 3619, 4600 and 5140m) and sex (men vs women) and their potential interaction were assessed using a Factorial Repeated Measures ANOVA...
July 20, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28731927/injectate-spread-following-anterior-sub-costal-and-posterior-approaches-to-the-quadratus-lumborum-block-a-comparative-cadaveric-study
#18
Hesham Elsharkawy, Kariem El-Boghdadly, Sree Kolli, Wael A S Esa, Sean DeGrande, Loran M Soliman, Richard L Drake
BACKGROUND: The dermatomal level of analgesia achieved with quadratus lumborum blocks varies according to the location of injection. The most commonly used approaches are either at the postero-lateral aspect or anterior to the quadratus lumborum muscle. The aim of the study was to determine whether the site of injection of contrast dye around the quadratus lumborum muscle of cadavers affects the extent and mechanism of dye spread. METHODS: Six fresh human cadavers received either a posterior quadratus lumborum block or an anterior sub-costal quadratus lumborum block on each side...
July 20, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/28731795/plant-size-and-competitive-dynamics-along-nutrient-gradients
#19
Deborah E Goldberg, Jason P Martina, Kenneth J Elgersma, William S Currie
Resource competition theory in plants has focused largely on resource acquisition traits that are independent of size, such as traits of individual leaves or roots or proportional allocation to different functions. However, plants also differ in maximum potential size, which could outweigh differences in module-level traits. We used a community ecosystem model called mondrian to investigate whether larger size inevitably increases competitive ability and how size interacts with nitrogen supply. Contrary to the conventional wisdom that bigger is better, we found that invader success and competitive ability are unimodal functions of maximum potential size, such that plants that are too large (or too small) are disproportionately suppressed by competition...
August 2017: American Naturalist
https://www.readbyqxmd.com/read/28731780/evaluation-of-turmeric-chip-compared-with-chlorhexidine-chip-as-a-local-drug-delivery-agent-in-the-treatment-of-chronic-periodontitis-a-split-mouth-randomized-controlled-clinical-trial
#20
Abhilasha Singh, Raja Sridhar, Ravi Shrihatti, Akash Mandloy
AIMS AND OBJECTIVE: The aim of this study was to evaluate and compare the effect of chlorhexidine (CHX) chip and turmeric chip as a local drug delivery (LDD) agent in the treatment of patients with chronic periodontitis. MATERIALS AND METHODS: A total of 120 sites with pocket depths 5-8 mm were chosen as a split mouth design at 3 sites in the same patient. Selected sites were randomly divided into three groups to receive CHX chip in addition to scaling and root planing (SRP) in group A, turmeric chip in addition to SRP in group B, and SRP only in group C...
July 21, 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
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