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https://www.readbyqxmd.com/read/28644849/rapid-development-of-cyanobacterial-crust-in-the-field-for-combating-desertification
#1
Chan-Ho Park, Xin Rong Li, Yang Zhao, Rong Liang Jia, Jae-Seoun Hur
Desertification is currently a major concern, and vast regions have already been devastated in the arid zones of many countries. Combined application of cyanobacteria with soil fixing chemicals is a novel method of restoring desertified areas. Three cyanobacteria, Nostoc sp. Vaucher ex Bornet & Flahault, Phormidium sp. Kützing ex Gomont and Scytonema arcangeli Bornet ex Flahault were isolated and tested in this study. Tacki-SprayTM (TKS7), which consists of bio-polysaccharides and tackifiers, was used as a soil fixing agent...
2017: PloS One
https://www.readbyqxmd.com/read/28644397/relationship-between-remote-sensing-data-plant-biomass-and-soil-nitrogen-dynamics-in-intensively-managed-grasslands-under-controlled-conditions
#2
Christoph Knoblauch, Conor Watson, Clara Berendonk, Rolf Becker, Nicole Wrage-Mönnig, Florian Wichern
The sustainable use of grasslands in intensive farming systems aims to optimize nitrogen (N) inputs to increase crop yields and decrease harmful losses to the environment at the same time. To achieve this, simple optical sensors may provide a non-destructive, time- and cost-effective tool for estimating plant biomass in the field, considering spatial and temporal variability. However, the plant growth and related N uptake is affected by the available N in the soil, and therefore, N mineralization and N losses...
June 23, 2017: Sensors
https://www.readbyqxmd.com/read/28643868/the-potassium-battery-a-mobile-energy-source-for-transport-processes-in-plant-vascular-tissues
#3
REVIEW
Ingo Dreyer, Judith Lucia Gomez-Porras, Janin Riedelsberger
Contents I. II. III. IV. V. VI. VII. VIII. References SUMMARY: Plant roots absorb potassium ions from the soil and transport them in the xylem via the transpiration stream to the shoots. There, in source tissues where sufficient chemical energy (ATP) is available, K(+) is loaded into the phloem and then transported with the phloem stream to other parts of the plant; in part, transport is also back to the roots. This, at first sight, futile cycling of K(+) has been uncovered to be part of a sophisticated mechanism that (1) enables the shoot to communicate its nutrient demand to the root, (2) contributes to the K(+) nutrition of transport phloem tissues and (3) transports energy stored in the K(+) gradient between phloem cytosol and the apoplast...
June 23, 2017: New Phytologist
https://www.readbyqxmd.com/read/28642767/silicon-mediated-improvement-in-plant-salinity-tolerance-the-role-of-aquaporins
#4
REVIEW
Juan J Rios, Maria C Martínez-Ballesta, Juan M Ruiz, Begoña Blasco, Micaela Carvajal
Silicon (Si) is an abundant and differentially distributed element in soils that is believed to have important biological functions. However, the benefits of Si and its essentiality in plants are controversial due to differences among species in their ability to take up this element. Despite this, there is a consensus that the application of Si improves the water status of plants under abiotic stress conditions. Hence, plants treated with Si are able to maintain a high stomatal conductance and transpiration rate under salt stress, suggesting that a reduction in Na(+) uptake occurs due to deposition of Si in the root...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28639933/saccharomyces-jurei-sp-nov-isolation-and-genetic-identification-of-a-novel-yeast-species-from-quercus-robur
#5
Samina Naseeb, Stephen A James, Haya Alsammar, Christopher J Michaels, Beatrice Gini, Carmen Nueno-Palop, Christopher J Bond, Henry McGhie, Ian N Roberts, Daniela Delneri
Two strains, D5088T and D5095, representing a novel yeast species belonging to the genus Saccharomyces were isolated from oak tree bark and surrounding soil located at an altitude of 1000 m above sea level in Saint Auban, France. Sequence analyses of the internal transcribed spacer (ITS) region and 26S rRNA D1/D2 domains indicated that the two strains were most closely related to Saccharomyces mikatae and Saccharomyces paradoxus. Genetic hybridization analyses showed that both strains are reproductively isolated from all other Saccharomyces species and, therefore, represent a distinct biological species...
June 22, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28639207/the-cell-biology-of-the-thyroid-disrupting-mechanism-of-dichlorodiphenyltrichloroethane-ddt
#6
REVIEW
M Rossi, A R Taddei, I Fasciani, R Maggio, F Giorgi
OBJECTIVE: Dichlorodiphenyltrichloroethane (DDT) is an organochlorine known for its pesticide properties and for its negative effects on human health. It was banned in most countries for its toxicity to the endocrine system, but due to its persistence at clinically relevant concentrations in both soil and animal tissues, DDT is still linked to several health and social problems. METHODS: We have previously shown that DDT exposure is causally related to the extracellular release of vesicular organelles such as microvesicles and/or exosomes by using immunocytochemistry with gold-tagged antibodies and various fluorescent membrane markers...
June 21, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28638622/the-synergistic-use-of-plant-and-isolated-bacteria-to-clean-up-polycyclic-aromatic-hydrocarbons-from-contaminated-soil
#7
S Eskandary, A Tahmourespour, M Hoodaji, A Abdollahi
BACKGROUND: Biological methods of polycyclic aromatic hydrocarbons (PAH) contamination elimination typically involve the transformation of contaminants to non-toxic materials by microorganisms and plants and appear to be the most effective methods available. METHODS: In this study, Bacillus licheniformis and Bacillus mojavensis isolated from oil-contaminated soils were inoculated onto Festuca arundinacea seeds before planting in the pot and 3 weeks after planting by syringe injection into the rhizospheric zone in order to study the elimination of PAHs from Festuca's rhizosphere in the greenhouse...
2017: Journal of Environmental Health Science & Engineering
https://www.readbyqxmd.com/read/28637931/comparative-miromics-of-salt-tolerant-and-salt-sensitive-rice
#8
Kavita Goswami, Anita Tripathi, Neeti Sanan-Mishra
Increase in soil salt causes osmotic and ionic stress to plants, which inhibits their growth and productivity. Rice production is also hampered by salinity and the effect of salt is most severe at the seedling and reproductive stages. Salainity tolerance is a quantitative property controlled by multiple genes coding for signaling molecules, ion transporters, metabolic enzymes and transcription regulators. MicroRNAs are key modulators of gene-expression that act at the post-transcriptional level by translation repression or transcript cleavage...
June 22, 2017: Journal of Integrative Bioinformatics
https://www.readbyqxmd.com/read/28634813/long-term-excessive-selenium-supplementation-induces-hypertension-in-rats
#9
Denise Grotto, Maria Fernanda Hornos Carneiro, Michele Mazzaron de Castro, Solange Cristina Garcia, Fernando Barbosa Junior
Selenium (Se) is an essential trace element involved in several biological pathways, naturally found in rocks, soils, and food. Even though the daily requirement of Se is achieved through a balanced diet, the use of Se supplements has been frequent. Due to the risk of toxic effects of having Se in excess, supplementation is still under debate. The aim was to evaluate the effects of long-term Se supplementation upon systolic blood pressure (SBP) and redox status of rats exposed to sodium selenite. Male Wistar rats were exposed to 2 and 6 mg/L of sodium selenite in drinking water for 85 days...
June 20, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28634718/mite-communities-acari-mesostigmata-in-young-and-mature-coniferous-forests-after-surface-wildfire
#10
Jacek Kamczyc, Cezary Urbanowski, Emilia Pers-Kamczyc
Density, diversity and assemblage structure of Mesostigmata (cohorts Gamasina and Uropodina) were investigated in Scots pine forests differing in forest age (young: 9-40 years and mature: 83-101 years) in which wildfire occurred. This animal group belongs to the dominant acarine predators playing a crucial role in soil food webs and being important as biological control agents. In total, six forests (three within young and three within mature stands) were inspected in Puszcza Knyszyńska Forest Complex in May 2015...
June 20, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28633101/assessment-of-environmental-and-health-risks-in-former-polymetallic-ore-mining-and-smelting-area-slovakia-spatial-distribution-and-accumulation-of-mercury-in-four-different-ecosystems
#11
Július Árvay, Lenka Demková, Martin Hauptvogl, Miloslav Michalko, Daniel Bajčan, Radovan Stanovič, Ján Tomáš, Miroslava Hrstková, Pavol Trebichalský
Former long-term mining and smelting of pollymetallic ores in the Middle Spiš area caused a serious contamination problem of the environment with heavy metals and metalloids, especially mercury (Hg). Several studies have reported concentration of Hg in the area but this paper provides first detailed characterization of Hg contamination of different environmental components in agricultural, forest, grassland and urban ecosystems. The ecosystems are in different distances from emission sources - former mercury and copper smelting plants in NE Slovakia...
June 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28632186/insights-into-penicillium-brasilianum-secondary-metabolism-and-its-biotechnological-potential
#12
REVIEW
Jaqueline Moraes Bazioli, Luciana Da Silva Amaral, Taícia Pacheco Fill, Edson Rodrigues-Filho
Over the past few years Penicillium brasilianum has been isolated from many different environmental sources as soil isolates, plant endophytes and onion pathogen. All investigated strains share a great ability to produce bioactive secondary metabolites. Different authors have investigated this great capability and here we summarize the metabolic potential and the biological activities related to P. brasilianum's metabolites with diverse structures. They include secondary metabolites of an alkaloid nature, i...
June 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28631154/soil-derived-organic-particles-and-their-effects-on-the-community-of-culturable-microorganisms
#13
Lukáš Bystrianský, Marcel Štofik, Milan Gryndler
Soil microbial community interacts with a range of particulate material in the soil, consisting of both inorganic and organic compounds with different levels of water solubility. Though sparingly water-soluble and insoluble organic compounds in the soil may affect living organisms, they are difficult to introduce into microbiological media. Their biological activity (i.e., their effect on soil microorganisms) thus has been almost neglected in most of the cultivation assays. To fill this gap, we propose the use of fine organic particles prepared from soil organic matter that are introduced into a laboratory medium where microbial community is cultivated...
June 19, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28628867/the-improvement-of-multi-contaminated-sandy-loam-soil-chemical-and-biological-properties-by-the-biochar-wood-ash-and-humic-substances-amendments
#14
Maria Pukalchik, Filip Mercl, Maria Panova, Kateřina Břendová, Vera A Terekhova, Pavel Tlustoš
Addition of low amount of humic substances, as a supplement to biochar or wood ash, can markedly enhance their remediation ability.
June 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28628006/live-tracking-of-moving-samples-in-confocal-microscopy-for-vertically-grown-roots
#15
Daniel von Wangenheim, Robert Hauschild, Matyáš Fendrych, Vanessa Barone, Eva Benková, Jiří Friml
Roots navigate through soil integrating environmental signals to orient their growth. The Arabidopsis root is a widely used model for developmental, physiological and cell biological studies. Live imaging greatly aids these efforts, but the horizontal sample position and continuous root tip displacement present significant difficulties. Here, we develop a confocal microscope setup for vertical sample mounting and integrated directional illumination. We present TipTracker - a custom software for automatic tracking of diverse moving objects usable on various microscope setups...
June 19, 2017: ELife
https://www.readbyqxmd.com/read/28623832/a-review-on-in-situ-phytoremediation-of-mine-tailings
#16
REVIEW
Li Wang, Bin Ji, Yuehua Hu, Runqing Liu, Wei Sun
Mine tailings are detrimental to natural plant growth due to their physicochemical characteristics, such as high pH, high salinity, low water retention capacity, high heavy metal concentrations, and deficiencies in soil organic matter and fertility. Thus, the remediation of mine tailings has become a key issue in environmental science and engineering. Phytoremediation, an in situ cost-effective technology, is emerging as the most promising remediation method for mine tailings by introducing tolerant plant species...
June 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/28622648/long-term-sustainability-of-microbial-induced-caco3-precipitation-in-aqueous-media
#17
Daniella Gat, Zeev Ronen, Michael Tsesarsky
Microbially induced CaCO3 precipitation (MICP) via urea hydrolysis is an emerging technique for soil amelioration, building materials rehabilitation and pollutants sequestration amongst other various environmental applications. The successful application of MICP requires the sustainability of the precipitated CaCO3; to which the fate of ammonia, the main by-product of ureolysis, is potentially significante. Ammonia volatilization and biological ammonia oxidation both induce a pH decrease, which, in turn, might cause CaCO3 dissolution...
June 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/28617843/characterization-of-the-regulation-of-a-plant-polysaccharide-utilization-operon-and-its-role-in-biofilm-formation-in-bacillus-subtilis
#18
Cameron Habib, Yiyang Yu, Kevin Gozzi, Carly Ching, Moshe Shemesh, Yunrong Chai
The soil bacterium Bacillus subtilis is often found in association with plants in the rhizosphere. Previously, plant polysaccharides have been shown to stimulate formation of root-associated multicellular communities, or biofilms, in this bacterium, yet the underlying mechanism is not fully understood. A five-gene gan operon (ganSPQAB) in B. subtilis has recently been shown to be involved in utilization of the plant-derived polysaccharide galactan. Despite these findings, molecular details about the regulation of the operon and the role of the operon in biofilm formation remain elusive...
2017: PloS One
https://www.readbyqxmd.com/read/28614606/antagonism-of-trichoderma-isolates-against-leucoagaricus-gongylophorus-singer-m%C3%A3-ller
#19
Mariela Otoni do Nascimento, Renato de Almeida Sarmento, Gil Rodrigues Dos Santos, Cléia Almeida de Oliveira, Danival José de Souza
Filamentous fungi from the genus Trichoderma are commonly found in soil. They are considered facultative mycoparasites, and are antagonists of other fungi such as the cultivar of leaf-cutting ants (Leucoagaricus gongylophorus). The aim of the present study was to bioprospect Trichoderma spp. from different soils collected from Gurupi, Tocantins, Brazil, for antagonistic effects against the mutualistic fungus of leaf-cutting ants. To isolate filamentous fungi, samples were collected from six locations. Preliminarily, isolates were identified by morphological analysis as belonging to Trichoderma...
June 14, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28611495/antibacterial-anticancer-and-neuroprotective-activities-of-rare-actinobacteria-from-mangrove-forest-soils
#20
Adzzie-Shazleen Azman, Iekhsan Othman, Chee-Mun Fang, Kok-Gan Chan, Bey-Hing Goh, Learn-Han Lee
Mangrove is a complex ecosystem that contains diverse microbial communities, including rare actinobacteria with great potential to produce bioactive compounds. To date, bioactive compounds extracted from mangrove rare actinobacteria have demonstrated diverse biological activities. The discovery of three novel rare actinobacteria by polyphasic approach, namely Microbacterium mangrovi MUSC 115(T), Sinomonas humi MUSC 117(T) and Monashia flava MUSC 78(T) from mangrove soils at Tanjung Lumpur, Peninsular Malaysia have led to the screening on antibacterial, anticancer and neuroprotective activities...
June 2017: Indian Journal of Microbiology
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