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https://www.readbyqxmd.com/read/29341173/strigolactones-positively-regulate-chilling-tolerance-in-pea-and-in-arabidopsis
#1
James W Cooper, Yan Hu, Leila Beyyoudh, H Yildiz Dasgan, Karl Kunert, Christine A Beveridge, Christine H Foyer
Strigolactones (SL) fulfil important roles in plant development and stress tolerance. Here we characterised the role of SL in the dark chilling tolerance of pea and Arabidopsis by analysis of mutants that are defective in either SL synthesis or signalling. Pea mutants (rms3, rms4, rms5) had significantly greater shoot branching with higher leaf chlorophyll a/b ratios and carotenoid contents than the wild type. Exposure to dark chilling significantly decreased shoot fresh weights but increased leaf numbers in all lines...
January 17, 2018: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29339187/doxorubicin-loaded-dendritic-fe3o4-supramolecular-nanoparticles-for-magnetic-drug-targeting-and-tumor-regression-in-spheroid-murine-melanoma-model
#2
Saumya Nigam, D Bahadur
This work evaluates the magnetically-guided delivery of DOX-loaded dendritic-Fe3O4 nanoparticles and their tumor regression efficacy in subcutaneous melanoma in C57BL/6 mice. The hematological, biochemical and histopathological parameters were minimally affected. The nanoparticles localized in lungs, liver and spleen suggesting non-specific uptake. However, in tumor-bearing mice, substantially higher localization in magnetically-targeted tumor was observed when compared to passive localization in non-targeted tumor...
January 12, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29338575/characterization-of-medium-chain-length-polyhydroxyalkanoate-biosynthesis-by-pseudomonas-mosselii-to7-using-crude-glycerol
#3
Ming-Hsu Liu, Yi-Jr Chen, Chia-Yin Lee
Polyhydroxyalkanoates (PHAs) are biopolyesters produced by microorganisms that are environmentally friendly. PHAs can be used to replace traditional plastic to reduce environmental pollution in various fields. PHA production costs are high because PHA must be produced from a carbon substrate. The purpose of this study was to find the strain that can used the BDF by-product as the sole carbon source to produce high amounts of medium-chain-length PHA. Three isolates were evaluated for potential PHA production by using biodiesel-derived crude glycerol as the sole carbon source...
January 17, 2018: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/29338429/study-of-aflatoxicosis-reduction-effect-of-alchornea-cordifolia-on-biomarkers-in-an-aflatoxin-b1-exposed-rats
#4
Jean-Baptiste Aholia Adépo, Pierre Manda, Jean Verdier Ngbé, Aïssata Diakité, Béatrice Tigori Sangaré, Sébastien Djédjé Dano
The toxicity of aflatoxins results in cancer and liver disease. Several natural substances such as plants exhibited their ability to inhibit the initiation of aflatoxin carcinogenesis. The aim of this study was to evaluate the effect of Alchornea cordifolia on biomarkers in an aflatoxin B1 (AFB1) exposed rats. The contents of polyphenols, flavonoids and the antioxidant activity of A. cordifolia ethanolic leaf extract (EELac) were assessed. Groups of rats were treated orally with a daily dose of a mixture of AFB1 at a dose of 150 μg/kg body weight and EELac (50, 100 and 300 mg/kg body weight) for 21 days...
January 17, 2018: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/29337927/the-plant-growth-promoting-fungus-pgpf-alternaria-sp-a13-markedly-enhances-salvia-miltiorrhiza-root-growth-and-active-ingredient-accumulation-under-greenhouse-and-field-conditions
#5
Li Si Zhou, Kun Tang, Shun Xing Guo
Plant growth-promoting fungi (PGPF) have attracted considerable interest as bio-fertilisers due to their multiple beneficial effects on plant quantity and quality and their positive relationship with the ecological environment. Advancements in the development of PGPF for crops and economic plant cultivation applications have been achieved, but such improvements for the use of PGPF with popular medicinal herbs, such as Salvia miltiorrhiza, are rare. In this study, we collected S. miltiorrhiza specimens inhabiting wild, semi-wild, farmland and pot-cultured areas in the Henan province of China and isolated endophytes from the roots, shoots and leaves of these samples...
January 16, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29337537/microplastic-effect-thresholds-for-freshwater-benthic-macroinvertebrates
#6
Paula E Redondo Hasselerharm, Dede Falahudin, Edwin Peeters, Albert A Koelmans
Now that microplastics have been detected in lakes, rivers and estuaries all over the globe, evaluating their effects on biota has become an urgent research priority. This is the first study that aims at determining the effect thresholds for a battery of six freshwater benthic macroinvertebrates with different species traits, using a wide range of microplastic concentrations. Standardized 28 d single species bioassays were performed under environmentally relevant exposure conditions using polystyrene microplastics (20 - 500 µm) mixed with sediment at concentrations ranging from 0 to 40% sediment dry weight (dw)...
January 16, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29337283/variability-studies-of-allochthonous-stone-pine-pinus-pinea-l-plantations-in-chile-through-nut-protein-profiling
#7
V Loewe, R M Navarro-Cerrillo, R Sánchez Lucas, F J Ruiz Gómez, J Jorrín-Novo
Stone pine (Pinus pinea) is characterized by low differentiation of growth parameters, high phenotypic plasticity and low genetic variability; detecting its diversity in introduced Chilean populations is therefore relevant for conservation and breeding programs. Here, variability among allochthonous Stone pine populations in Chile was explored using electrophoresis-based proteomic analysis of pine nuts. Cones from 30 populations distributed along a climatic gradient in Chile were surveyed and sampled, and proteins were extracted from seed flour using the TCA-acetone precipitation protocol...
January 11, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29337267/acute-lung-injury-induced-by-intestinal-ischemia-and-reperfusion-is-altered-in-obese-female-mice
#8
Evelyn Thais Fantozzi, Sara Garbin, Fernanda Yamamoto-Ricardo-da-Silva, Ricardo Martins Oliveira-Filho, Domenico Spina, Wothan Tavares-de-Lima, Yanira Riffo-Vasquez
RATIONAL: Acute lung injury (ALI) is a common complication after intestinal ischemia and reperfusion (I/R) injury that can lead to acute respiratory distress syndrome (ARDS). We have previously demonstrated that females are protected against lung damage induced by intestinal I/R through an estrogen mediated mechanism. OBJECTIVES: to investigate the effect of obesity on ALI induced by intestinal I/R in female mice. METHODS: C57Bl/6 female mice were fed with a standard low-fat diet (SD) or a high-fat diet (HFD) for 9 weeks...
January 11, 2018: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29336672/internal-cs-inhibits-root-elongation-in-rice
#9
Sonia Mohamed, Hervé Sentenac, Emmanuel Guiderdoni, Anne-Aliénor Véry, Manuel Nieves-Cordones
The root system anchors the plant to the soil and contributes to plant autotrophy by taking up nutrients and water. In relation with this nutritional function, root development is largely impacted by availability of nutrients and water. Due to human activity, plants, in particular crops, can also be exposed to pollutants which can be absorbed and incorporated into the food chain. Cesium in soils is present at non-toxic concentrations for the plant (micromolar or less), even in soils highly polluted with radioactive cesium due to nuclear accidents...
January 16, 2018: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/29335853/effect-of-nonwoven-jute-agrotextile-mulch-on-soil-health-and-productivity-of-broccoli-brassica-oleracea-l-in-lateritic-soil
#10
Koushik Manna, Manik Chandra Kundu, Biplab Saha, Goutam Kumar Ghosh
A field experiment was conducted in winter season of 2015-2016 in the dry lateritic soil of Eastern India to study the effect of different thicknesses of nonwoven jute agrotextile mulches (NJATM) along with other mulches on soil health, growth and productivity of broccoli (Brassica oleracea L.). The experiment was conducted in randomized block design with six treatments viz., T1 (control, i.e. no mulching), T2 (300 gsm NJATM), T3 (350 gsm NJATM), T4 (400 gsm NJATM), T5 (rice straw) and T6 (black polythene mulch), each of which was replicated four times...
January 16, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29333991/evaluation-of-a-portable-gas-chromatograph-with-photoionization-detector-under-variations-of-voc-concentration-temperature-and-relative-humidity
#11
Jhy-Charm Soo, Eun Gyung Lee, Ryan F LeBouf, Michael L Kashon, William Chisholm, Martin Harper
The objective of this present study was to evaluate the performance of a portable gas chromatograph ─ photoionization detector (GC-PID), under various test conditions to determine if it could be used in occupational settings. A mixture of seven volatile organic compounds (VOCs) - acetone, ethylbenzene, methyl isobutyl ketone, toluene, m-xylene, p-xylene, and o-xylene - was selected because its components are commonly present in paint manufacturing industries. A full-factorial combination of four concentration levels (exposure scenarios) of VOC mixtures, three different temperatures (25˚C, 30˚C, and 35˚C), and three relative humidities (RHs; 25%, 50%, and 75%) was conducted in a full- size controlled environmental chamber...
January 15, 2018: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/29333042/gas-chromatography-mass-spectrometry-profiling-in-methanolic-and-ethyl-acetate-root-and-stem-extract-of-corbichonia-decumbens-forssk-exell-from-thar-desert-of-rajasthan-india
#12
Sunita Arora, Manju Saini
Background: Corbichonia decumbens (Forssk.) Exell (Molluginaceae), recently has moved to Lophiocarpaceae as per angiospermic plant group (APG) III system, is an annual or short-lived, dwarf, glabrous subshrub, prefers to grow on rocky places and on sand-stones in dry, hot areas of Rajasthan. This is the potential plant with medicinal properties. Vegetative organs under study show antioxidant, anti-inflammatory, antiulcer, antimicrobial, and antinociception activity. Objective: This study was carried out to identify the phytoconstituents present in the methanolic and ethyl-acetate extract of root and stem of C...
December 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/29332277/efficient-degradation-of-triclosan-by-an-endophytic-fungus-penicillium-oxalicum-b4
#13
Hao Tian, Yan Jun Ma, Wan Yi Li, Jian Wen Wang
Triclosan (TCS), a widely used antimicrobial and preservative agent, is an emerging contaminant in aqueous and soil environment. Microbial degradation of TCS has not been reported frequently because of its inhibition of microbe growth. To explore the new microbial resources for TCS biodegradation, fungal endophytes were isolated and screened for the degradation potential. The endophytic strain B4 isolated from Artemisia annua L. showed higher degradation efficiency and was identified as Penicillium oxalicum based on its morphology and ITS sequences of ribosomal DNA...
January 13, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29332147/phosphorus-allocation-and-phosphatase-activity-in-grasses-with-different-growth-rates
#14
Leandro Bittencourt de Oliveira, Anderson Cesar Ramos Marques, Fernando Luiz Ferreira de Quadros, Júlia Gomes Farias, Rogério Piccin, Gustavo Brunetto, Fernando Teixeira Nicoloso
Different growth rates of grasses from South American natural grasslands are adaptations to soils of low fertility. Grasses with fast growth rate are species with an accumulation of nutrients in soluble forms, with a high metabolic rate. This work aimed to study whether grasses with different growth rates have different phosphorus (P) uptake and efficiency of P use with high and low P availability in soil, as well as whether phosphatase activity is related to the species growth rate and variations in P biochemical forms in the tissues...
January 13, 2018: Oecologia
https://www.readbyqxmd.com/read/29331826/pathway-and-mechanism-of-nitrogen-transformation-during-composting-functional-enzymes-and-genes-under-different-concentrations-of-pvp-agnps
#15
Guangming Zeng, Lihua Zhang, Haoran Dong, Yaoning Chen, Jiachao Zhang, Yuan Zhu, Yujie Yuan, Yankai Xie, Wei Fang
Polyvinylpyrrolidone coated silver nanoparticles (PVP-AgNPs) were applied at different concentrations to reduce total nitrogen (TN) losses and the mechanisms of nitrogen bio-transformation were investigated in terms of the nitrogen functional enzymes and genes. Results showed that mineral N in pile 3 which was treated with AgNPs at a concentration of 10 mg/kg compost was the highest (6.58 g/kg dry weight (DW) compost) and the TN loss (47.07%) was the lowest at the end of composting. Correlation analysis indicated that TN loss was significantly correlated with amoA abundance...
December 29, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29331557/soil-to-plant-transfer-factors-of-natural-radionuclides-226ra-and-40k-in-selected-thai-medicinal-plants
#16
Kiadtisak Saenboonruang, Endu Phonchanthuek, Kamonkhuan Prasandee
A soil-to-plant transfer factor (TF) is an important parameter that could be used to estimate radionuclides levels in medicinal plants. This work reports concentrations of natural radionuclides (226Ra and 40K) and TFs in six Thai medicinal plants grown in central Thailand using an HPGe gamma ray spectrometer. Either root, leaf, or flower parts of each medicinal plant were selected for use in the investigation according to their practical uses in traditional medicine. The results showed that due to K being essential in plants, 40K had higher arithmetic means of activity concentrations and geometric means of TFs (geometric standard deviations in parentheses) of 610 ± 260 Bq kg-1 dry weight (DW) and 2...
January 11, 2018: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29331467/canadian-national-dairy-study-herd-level-milk-quality
#17
C A Bauman, H W Barkema, J Dubuc, G P Keefe, D F Kelton
The objective of this study was to estimate Canadian national milk quality parameters and estimate the bulk tank milk (BTM) prevalence of 4 mastitis pathogens, Staphylococcus aureus, Streptococcus agalactiae, Mycoplasma bovis, and Prototheca spp., on Canadian dairy farms. A questionnaire was sent to all Canadian dairy producers. Of the 1,062 producers who completed the questionnaire, 374 producers from across the country were visited and milking hygiene was assessed. Farm-level milk quality data for all Canadian dairy producers was collected from the provincial marketing boards and combined with the questionnaire and farm visit data...
January 10, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29331219/polycyclic-aromatic-hydrocarbons-in-soils-and-lichen-from-the-western-tibetan-plateau-concentration-profiles-distribution-and-its-influencing-factors
#18
Ruichen Zhou, Ruiqiang Yang, Chuanyong Jing
The Tibetan Plateau (TP) is a huge area and rarely affected by human activity, and is regarded as one of the most remote regions on the earth. Many studies about the long-range atmospheric transport (LRAT) of semi-volatile organic compounds (SVOCs) were conducted in southern and central TP. However, there are very limited studies focused on PAHs in the western TP and the concentrations profiles, distribution and its controlling factors in this area remains unclear. Thus, to explore this knowledge gap, 37 surface soil samples and 23 lichen samples were collected and analyzed for PAHs...
January 10, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29331150/production-of-eicosapentaenoic-acid-by-application-of-a-delta-6-desaturase-with-the-highest-ala-catalytic-activity-in-algae
#19
Haisu Shi, Xue Luo, Rina Wu, Xiqing Yue
Dunaliella salina is a unicellular green alga with a high α-linolenic acid (ALA) level, but a low eicosapentaenoic acid (EPA) level. In a previous analysis of the catalytic activity of delta 6 fatty acid desaturase (FADS6) from various species, FADS6 from Thalassiosira pseudonana (TpFADS6), a marine diatom, showed the highest catalytic activity for ALA. In this study, to enhance EPA production in D. salina, FADS6 from D. salina (DsFADS6) was identified, and substrate specificities for DsFADS6 and TpFADS6 were characterized...
January 13, 2018: Microbial Cell Factories
https://www.readbyqxmd.com/read/29331034/effects-of-in-situ-selenium-exposure-and-maternal-transfer-on-survival-and-deformities-of-brown-trout-salmo-trutta-fry
#20
Sean M Covington, Rami B Naddy, Alan L Prouty, Steven A Werner, Mark Dunn Lewis
Offspring of wild adult brown trout exposed to a range of selenium (Se) concentrations were reared in a laboratory setting to primarily assess effects on survival and deformities. Maternal whole body Se concentrations ranged from 4.7 to 22.6 mg/kg dry weight (dw) for wild fish. Corresponding Se concentrations in embryos ranged from 6.2 to 40.3 mg/kg dw. Significant relationships were found between embryo and whole-body tissue concentrations. Increasing egg Se concentrations were correlated with decreasing survival; however, hatch success was not significantly correlated with increasing embryo Se...
January 13, 2018: Environmental Toxicology and Chemistry
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