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https://www.readbyqxmd.com/read/28541720/assessment-of-hydrocarbon-degradation-potentials-in-plant-microbe-interaction-system-with-oil-sludge-contamination-a-sustainable-solution
#1
Monika Dhote, Anil Kumar, Anjana Jajoo, Asha Juwarkar
A pot culture experiment was conducted for 90 days for evaluation of oil and total petroleum hydrocarbon (TPH) degradation in vegetated and non-vegetated treatments of real field oil sludge contaminated soil. Five different treatments include, (T1) control, 2% oil sludge contaminated soil; (T2), augmentation of microbial consortium; (T3), Vertiver zizanioide; (T4), bio-augmentation along with Vertiver zizanioide and (T5), bio-augmentation with Vertiver zizanioide and bulking agent. During the study, oil reduction, TPH and degradation of its fractions was determined...
May 25, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28538103/detoxification-of-fusaric-acid-by-the-soil-microbe-mucor-rouxii
#2
Frankie K Crutcher, Lorraine S Puckhaber, Alois A Bell, Jinggao Liu, Sara E Duke, Robert D Stipanovic, Robert L Nichols
Fusarium oxysporum f. sp. vasinfectum race 4 (VCG0114), which causes root rot and wilt of cotton (Gossypium hirsutum and G. barbadense) has been identified recently for the first time in the western hemisphere in certain fields in the San Joaquin Valley of California. This pathotype produces copious quantities of the plant toxin fusaric acid (5-butyl-2-pyridinecarboxylic acid) compared to other isolates of F. oxysporum f. sp. vasinfectum (Fov) that are indigenous to the U. S. Fusaric acid is toxic to cotton plants and may help the pathogen compete with other microbes in the soil...
May 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28529501/microbial-degradation-of-lobster-shells-to-extract-chitin-derivatives-for-plant-disease-management
#3
Gayathri Ilangumaran, Glenn Stratton, Sridhar Ravichandran, Pushp S Shukla, Philippe Potin, Samuel Asiedu, Balakrishnan Prithiviraj
Biodegradation of lobster shells by chitinolytic microorganisms are an environment safe approach to utilize lobster processing wastes for chitin derivation. In this study, we report degradation activities of two microbes, "S223" and "S224" isolated from soil samples that had the highest rate of deproteinization, demineralization and chitinolysis among ten microorganisms screened. Isolates S223 and S224 had 27.3 and 103.8 protease units mg(-1) protein and 12.3 and 11.2 μg ml(-1) of calcium in their samples, respectively, after 1 week of incubation with raw lobster shells...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28516055/antimicrobial-and-enzymatic-activity-of-actinomycetes-isolated-from-soils-of-coastal-islands
#4
Ivana Charousová, Juraj Medo, Eva Halenárová, Soňa Javoreková
Microbiological investigation of unexplored ecosystems is crucial for discovering of antibiotic producing actinomycetes. The present study was conducted to determine antimicrobial activity and identify the most active strains. Actinomycetes were isolated using the spread plate technique following by serial dilution of samples on starch casein agar. The screening method consists of primary and secondary testing. The most active isolates were identified based on molecular and cultural methods. 42 out of 66 isolates displayed antimicrobial potential...
April 2017: Journal of Advanced Pharmaceutical Technology & Research
https://www.readbyqxmd.com/read/28512464/insights-into-the-mechanism-of-proliferation-on-the-special-microbes-mediated-by-phenolic-acids-in-the-radix-pseudostellariae-rhizosphere-under-continuous-monoculture-regimes
#5
Hongmiao Wu, Junjian Xu, Juanying Wang, Xianjin Qin, Linkun Wu, Zhicheng Li, Sheng Lin, Weiwei Lin, Quan Zhu, Muhammad U Khan, Wenxiong Lin
As potent allelochemicals, phenolic acids are believed to be associated with replanting disease and cause microflora shift and structural disorder in the rhizosphere soil of continuously monocultured Radix pseudostellariae. The transcriptome sequencing was used to reveal the mechanisms underlying the differential response of pathogenic bacterium Kosakonia sacchari and beneficial bacterium Bacillus pumilus on their interactions with phenolic acids, the main allelochemicals in root exudates of R. pseudostellariae in the monoculture system...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28501571/enhanced-biodegradation-of-pahs-in-historically-contaminated-soil-by-m-%C3%A2-gilvum-inoculated-biochar
#6
Bijing Xiong, Youchi Zhang, Yanwei Hou, Hans Peter H Arp, Brian J Reid, Chao Cai
The inoculation of rice straw biochar with PAH-degrading Mycobacterium gilvum (1.27 × 10(11) ± 1.24 × 10(10) cell g(-1)), and the subsequent amendment of this composite material to PAHs contaminated (677 mg kg(-1)) coke plant soil, was conducted in order to investigate if would enhance PAHs biodegradation in soils. The microbe-biochar composite showed superior degradation capacity for phenanthrene, fluoranthene and pyrene. Phenanthrene loss in the microbe-biochar composite, free cell alone and biochar alone treatments was, respectively, 62...
May 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28498521/does-drought-stress-modify-the-effects-of-plant-growth-promoting-rhizobacteria-on-an-aboveground-chewing-herbivore
#7
Maite Fernández de Bobadilla, Julia Friman, Nurmi Pangesti, Marcel Dicke, Joop J A van Loon, Ana Pineda
Soil microbes have important effects on the interactions of plants with their environment, by promoting plant growth, inducing resistance to pests or by conferring tolerance to abiotic stress. However, their effects are variable and the factors responsible for this variation are mainly unknown. Our aim was to assess how drought stress modifies the effect of the non-pathogenic rhizobacterium Pseudomonas simiae WCS417r on plant growth and resistance against the generalist leaf-chewing caterpillar Mamestra brassicae...
May 12, 2017: Insect Science
https://www.readbyqxmd.com/read/28494298/remediation-of-pah-polluted-soils-using-a-soil-microbial-fuel-cell-influence-of-electrode-interval-and-role-of-microbial-community
#8
Bao Yu, Jing Tian, Liu Feng
The soil microbial fuel cells (SMFCs) were constructed to remediate soils contaminated by polycyclic aromatic hydrocarbons (PAHs). With a maximum power density of 12.1mWm(-2) and an internal resistance of 470Ω, a closed SMFC showed electricity generation comparable to that by an open SMFC after 175days of operation and meanwhile increased the removal rates of anthracene, phenanthrene, and pyrene to 54.2±2.7%, 42.6±1.9% and 27.0±2.1% from 20.8±1.1%, 17.3±1.2% and 11.7±0.9%, respectively, by the open SMFC...
April 28, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28494084/the-use-of-high-throughput-dna-sequence-analysis-to-assess-the-endophytic-microbiome-of-date-palm-roots-grown-under-different-levels-of-salt-stress
#9
Mahmoud W Yaish, Ibtisam Al-Harrasi, Aliya S Alansari, Rashid Al-Yahyai, Bernard R Glick
Date palms are able to grow under diverse abiotic stress conditions including in saline soils, where microbial communities may be help in the plant's salinity tolerance. These communities able to produce specific growth promoting substances can enhance date palm growth in a saline environment. However, these communities are poorly defined. In the work reported here, the date palm endophytic bacterial and fungal communities were identified using the pyrosequencing method, and the microbial differential abundance in the root upon exposure to salinity stress was estimated...
September 2016: International Microbiology: the Official Journal of the Spanish Society for Microbiology
https://www.readbyqxmd.com/read/28493683/plant-uptake-and-metabolism-of-nitrofuran-antibiotics-in-spring-onion-grown-in-nitrofuran-contaminated-soil
#10
Yinan Wang, K K Jason Chan, Wan Chan
Environmental pollution caused by the discharge of mutagenic and carcinogenic nitrofuran to the aquatic and soil environment is an emerging public health concern because of the potential in producing drug-resistant microbes and being uptaken by food crops. Using liquid chromatography-tandem mass spectrometry analysis and with spring onion (Allium wakegi Araki) as the plant model, we investigated in this study the plant uptake and accumulation of nitrofuran from contaminated environment. Our study revealed for the first time high uptake and accumulation rates of nitrofuran in the edible parts of the food crop...
May 11, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28492990/field-scale-pattern-of-denitrifying-microorganisms-and-n2o-emission-rates-indicate-a-high-potential-for-complete-denitrification-in-an-agriculturally-used-organic-soil
#11
Stefanie Schulz, Angelika Kölbl, Martin Ebli, Franz Buegger, Michael Schloter, Sabine Fiedler
More than 50% of all anthropogenic N2O emissions come from the soil. Drained Histosols that are used for agricultural purposes are particularly potent sources of denitrification due to higher stocks of organic matter and fertiliser application. However, conditions that favour denitrification can vary considerably across a field and change significantly throughout the year. Spatial and temporal denitrifier dynamics were assessed in a drained, intensely managed Histosol by focusing on the genetic nitrite and N2O reduction potential derived from the abundance of nirK, nirS and nosZ genes...
May 11, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28490624/removal-of-an-apex-predator-initiates-a-trophic-cascade-that-extends-from-herbivores-to-vegetation-and-the-soil-nutrient-pool
#12
Timothy Morris, Mike Letnic
It is widely assumed that organisms at low trophic levels, particularly microbes and plants, are essential to basic services in ecosystems, such as nutrient cycling. In theory, apex predators' effects on ecosystems could extend to nutrient cycling and the soil nutrient pool by influencing the intensity and spatial organization of herbivory. Here, we take advantage of a long-term manipulation of dingo abundance across Australia's dingo-proof fence in the Strzelecki Desert to investigate the effects that removal of an apex predator has on herbivore abundance, vegetation and the soil nutrient pool...
May 17, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28488147/advances-and-perspective-in-bioremediation-of-polychlorinated-biphenyl-contaminated-soils
#13
Jitendra K Sharma, Ravindra K Gautam, Sneha V Nanekar, Roland Weber, Brajesh K Singh, Sanjeev K Singh, Asha A Juwarkar
In recent years, microbial degradation and bioremediation approaches of polychlorinated biphenyls (PCBs) have been studied extensively considering their toxicity, carcinogenicity and persistency potential in the environment. In this direction, different catabolic enzymes have been identified and reported for biodegradation of different PCB congeners along with optimization of biological processes. A genome analysis of PCB-degrading bacteria has led in an improved understanding of their metabolic potential and adaptation to stressful conditions...
May 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28480539/plant-litter-chemistry-alters-the-content-and-composition-of-organic-carbon-associated-with-soil-mineral-and-aggregate-fractions-in-invaded-ecosystems
#14
Mioko Tamura, Vidya Suseela, Myrna Simpson, Brian Powell, Nishanth Tharayil
Through the input of disproportionate quantities of chemically distinct litter, invasive plants may potentially influence the fate of organic matter associated with soil mineral and aggregate fractions in some of the ecosystems they invade. Though context dependent, these native ecosystems subjected to prolonged invasion by exotic plants may be instrumental in distinguishing the role of plant-microbe-mineral interactions from the broader edaphic and climatic influences on the formation of soil organic matter (SOM)...
May 8, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28472099/microbiomes-associated-with-infective-stages-of-root-knot-and-lesion-nematodes-in-soil
#15
Ahmed Elhady, Ariadna Giné, Olivera Topalovic, Samuel Jacquiod, Søren J Sørensen, Francisco Javier Sorribas, Holger Heuer
Endoparasitic root-knot (Meloidogyne spp.) and lesion (Pratylenchus spp.) nematodes cause considerable damage in agriculture. Before they invade roots to complete their life cycle, soil microbes can attach to their cuticle or surface coat and antagonize the nematode directly or by induction of host plant defenses. We investigated whether the nematode-associated microbiome in soil differs between infective stages of Meloidogyne incognita and Pratylenchus penetrans, and whether it is affected by variation in the composition of microbial communities among soils...
2017: PloS One
https://www.readbyqxmd.com/read/28459141/competition-drives-the-response-of-soil-microbial-diversity-to-increased-grazing-by-vertebrate-herbivores
#16
David J Eldridge, Manuel Delgado-Baquerizo, Samantha K Travers, James Val, Ian Oliver, Kelly Hamonts, Brajesh K Singh
Scientists have largely neglected the effects of grazing on soil microbial communities despite their importance as drivers of ecosystem functions and services. We hypothesised that changes in soil properties resulting from grazing regulate the diversity of soil microbes by releasing/suppressing subordinate microbial taxa via competition. To test this, we examined intensity of vertebrate herbivores influences the diversity and composition of soil bacteria and fungi at 216 soil samples from 54 sites and four microsites...
April 29, 2017: Ecology
https://www.readbyqxmd.com/read/28458251/effects-and-mechanisms-of-biochar-microbe-interactions-in-soil-improvement-and-pollution-remediation-a-review
#17
REVIEW
Xiaomin Zhu, Baoliang Chen, Lizhong Zhu, Baoshan Xing
Biochars have attracted tremendous attention due to their effects on soil improvement; they enhance carbon storage, soil fertility and quality, and contaminant (organic and heavy metal) immobilization and transformation. These effects could be achieved by modifying soil microbial habitats and (or) directly influencing microbial metabolisms, which together induce changes in microbial activity and microbial community structures. This review links microbial responses, including microbial activity, community structures and soil enzyme activities, with changes in soil properties caused by biochars...
April 27, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28456029/advances-in-microbe-assisted-reclamation-of-heavy-metal-contaminated-soils-over-the-last-decade-a-review
#18
REVIEW
Muhammad Arslan Ashraf, Iqbal Hussain, Rizwan Rasheed, Muhammad Iqbal, Muhammad Riaz, Muhammad Saleem Arif
Contamination of agricultural soils with trace metals present lethal consequences in terms of diverse ecological and environmental problems that entail entry of metal in food chain, soil deterioration, plant growth suppression, yield reduction and alteration in microbial community. Metal polluted soils have become a major concern for scientists around the globe. Phytoremediation involves the hyperaccumulation of metals in different plant parts. Phytoremediation of metals from polluted soils could be enhanced through inoculation with metal resistant plant growth promoting (PGP) bacteria...
April 26, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28454707/piriformospora-indica-promotes-growth-seed-yield-and-quality-of-brassica-napus-l
#19
Zhen-Zhu Su, Ting Wang, Neeraj Shrivastava, You-Yuan Chen, Xiaoxi Liu, Chao Sun, Yufeng Yin, Qi-Kang Gao, Bing-Gan Lou
In current scenario, crop productivity is being challenged by decreasing soil fertility. To cope up with this problem, different beneficial microbes are explored to increase the crop productivity with value additions. In this study, Brassica napus L., an important agricultural economic oilseed crop with rich source of nutritive qualities, was interacted with Piriformospora indica, a unique root colonizing fungus with wide host range and multifunctional aspects. The fungus-treated plants showed a significant increase in agronomic parameters with plant biomass, lodging-resistance, early bolting and flowering, oil yield and quality...
June 2017: Microbiological Research
https://www.readbyqxmd.com/read/28452034/deciphering-biodegradable-chelant-enhanced-phytoremediation-through-microbes-and-nitrogen-transformation-in-contaminated-soils
#20
Linchuan Fang, Mengke Wang, Lin Cai, Long Cang
Biodegradable chelant-enhanced phytoremediation offers an alternative treatment technique for metal contaminated soils, but most studies to date have addressed on phytoextraction efficiency rather than comprehensive understanding of the interactions among plant, soil microbes, and biodegradable chelants. In the present study, we investigated the impacts of biodegradable chelants, including nitrilotriacetate, S,S-ethylenediaminedisuccinic acid (EDDS), and citric acid on soil microbes, nitrogen transformation, and metal removal from contaminated soils...
April 28, 2017: Environmental Science and Pollution Research International
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