Abstract：
:We demonstrated previously that Cr(VI) is readily reduced to oxoCr(V)-diols at the surface of Arthrobacter oxydans-a Gram-positive aerobic bacteria isolated from Columbia basalt rocks originated from a highly contaminated site in the USA. Here, we report an electron spin resonance (ESR) study of Cr(III) hydroxide formation from Cr(V)-diols by this bacterial strain as cells were exposed to 35, 200, and 400 mg/L of Cr(VI) under aerobic conditions as a batch culture and as lyophilized cells. The time-dependent ESR measurements show that the half-time of Cr(III) formation is almost equal to that of Cr(V) decomposition, which is in the range of 3-6 days for all cases. This rate is at least 300 times slower than that of Cr(V) formation. Additionally, atomic absorption spectrometry was also employed to examine the time course of total chromium in bacterial cells. This is the first time the kinetics of Cr(III) complexes formation in bacteria is evaluated.
journal_name
Microb Ecoljournal_title
Microbial ecologyauthors
Tsibakhashvili NY,Kalabegishvili TL,Rcheulishvili AN,Murusidze IG,Rcheulishvili OA,Kerkenjia SM,Holman HYdoi
10.1007/s00248-008-9476-6subject
Has Abstractpub_date
2009-02-01 00:00:00pages
360-6issue
2eissn
0095-3628issn
1432-184Xjournal_volume
57pub_type
杂志文章abstract：:The present study aimed to experimentally quantify the influence of a reduction of surface sediment permeability on microbial characteristics and ecological processes (respiration and leaf litter decomposition) occurring in the hyporheic zone (i.e. the sedimentary interface between surface water and groundwater). The ...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-010-9774-7
更新日期：2011-05-01 00:00:00
abstract：:Owing to their ubiquitous presence and ability to act as primary or opportunistic pathogens, Vibrio species greatly contribute to the diversity and evolution of marine ecosystems. This study was aimed at unveiling the cellular strategies enabling the marine gammaproteobacterium Vibrio harveyi to adapt and persist in n...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-015-0614-7
更新日期：2015-10-01 00:00:00
abstract：:Salt marshes are unique ecosystem of which a microbial community is expected to be affected by global climate change. In this study, by using T-RFLP analysis, quantitative PCR, and pyrosequencing, we comprehensively analyzed the microbial community structure responding to elevated CO2 (eCO2) and N addition in a salt m...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-017-0960-8
更新日期：2017-10-01 00:00:00
abstract：:Bacterioplankton community composition was studied in 12 lakes in three different geographic regions in Scandinavia using denaturing gradient gel electrophoresis (DGGE) and sequencing of 16S rDNA. Area-specific abundant taxa were found in the lakes in two of the regions. In the region of Uppland the lakes had an alpha...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-002-0007-6
更新日期：2002-07-01 00:00:00
abstract：:Microorganisms play a crucial role in lignocellulosic degradation. Many enriched microbial communities have demonstrated to reach functional and structural stability with effective degrading capacities of industrial interest. These microbial communities are typically composed by only few dominant species and a high nu...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-019-01403-w
更新日期：2020-02-01 00:00:00
abstract：:Bulbous rush (Juncus bulbosus) is a pioneer species in acidic, iron-rich, coal mining lakes in the eastern part of Germany. Juncus roots are coated with iron plaques, and it has been suggested that microbial processes under the iron plaques might be supportive for Juncus plant growth. The objectives of this work were ...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-002-1054-8
更新日期：2003-10-01 00:00:00
abstract：:Abstract Lakes receive organic carbon from a diversity of sources which vary in their contribution to planktonic microbial food webs. We conducted a mesocosm study to test the effects of three different detrital carbon sources (algae, aquatic macrophytes, terrestrial leaves) on several measures of microbial metabolism...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s002489900127
更新日期：1999-01-01 00:00:00
abstract：:Bisphenol A (BPA) is one of the endocrine-disrupting chemicals that are ubiquitous in aquatic environments. Biodegradation is a major way to clean up the BPA pollution in sediments. However, information on the effective BPA biodegradation in anaerobic sediments is still lacking. The present study investigated the biod...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-014-0551-x
更新日期：2015-07-01 00:00:00
abstract：:Cultivation and molecular-based approaches were used to study microbial diversity in two Chilean marine sediments contaminated with high (835 ppm) and very high concentrations of copper (1,533 ppm). The diversity of cultivable bacteria resistant to copper was studied at oxic and anoxic conditions, focusing on sulfate-...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-012-0120-0
更新日期：2013-02-01 00:00:00
abstract：:Eucalyptus plantations offer a cost-effective and renewable source of raw material. There is substantial interest in improving forestry production, especially through sustainable strategies such as the use of plant growth-promoting bacteria. However, little is known about Eucalyptus microbiology. In this study, the en...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-017-1014-y
更新日期：2018-01-01 00:00:00
abstract：:To date, there is a limited understanding of the role of the airway microbiome in the early life development of respiratory diseases such as asthma, partly due to a lack of simple and minimally invasive sample collection methods. In order to characterize the baseline microbiome of the upper respiratory tract (URT) in ...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-015-0663-y
更新日期：2016-01-01 00:00:00
abstract：:To date, little is known about the diazotrophs in freshwater ecosystems. In this study, we examined the diversity, abundance, and distribution of the diazotrophic community in the deep oligotrophic Lake Fuxian using high-throughput sequencing and quantitative polymerase chain reaction of nifH genes. Our results showed...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-019-01461-0
更新日期：2020-05-01 00:00:00
abstract：:The beef cattle industry represents a significant portion of the USA's agricultural sect, with beef cattle accounting for the most red meat consumed in the USA. Feed represents the largest input cost in the beef industry, accounting for approximately 70% of total input cost. Given that, novel methods need to be employ...
journal_title：Microbial ecology
pub_type： 杂志文章,评审
doi：10.1007/s00248-018-1234-9
更新日期：2019-02-01 00:00:00
abstract：:The DNA sequence diversities for microbial communities in four soils affected by agricultural chemicals (mainly triadimefon and ammonium bicarbonate and their intermediates) were evaluated by Random Amplified Polymorphic DNA (RAPD) analysis. Fourteen random primers were used to amplify RAPDs from four soil microbial c...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s002489900180
更新日期：2000-01-01 00:00:00
abstract：:We investigated the dynamics and diversity of heterotrophic bacteria, autotrophic and heterotrophic flagellates, and ciliates from March to July 2002 in the surface waters (0-50 m) of Lake Bourget. The heterotrophic bacteria consisted mainly of "small" cocci, but filaments (>2 microm), commonly considered to be grazin...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-004-0230-4
更新日期：2006-07-01 00:00:00
abstract：:The relative amounts of hyphal inoculum in forest soils may determine the capacity for fungi to compete with and replace early colonizers of wood in ground contact. Our aim in this study was to test the flexibility of priority effects (colonization timing) by varying the timing of inoculum introduction (i.e., precolon...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-015-0588-5
更新日期：2015-05-01 00:00:00
abstract：:A survey was made of the yeast communities isolated from necrotic tissue of 4 species of prickly-pear cacti (Opuntia stricta, O. tomentosa, O. monacantha, andO. streptacantha) which have colonized in Australia. Yeast communities were sampled from a number of localities and at different times. Cactus specific yeasts ac...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/BF02015562
更新日期：1984-12-01 00:00:00
abstract：:This study investigated the relationships of time-dependent hydrological variability and selected microbial food web components. Samples were collected monthly from the Kopački Rit floodplain in Croatia, over a period of 19 months, for analysis of bacterioplankton abundance, cell size and biomass; abundance of heterot...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-012-0016-z
更新日期：2012-07-01 00:00:00
abstract：:Deep sequencing of prokaryotic 16S rDNA regularly reveals thousands of microbial species thriving in many common habitats. It is still unknown how this huge microbial diversity, including many potentially competing organisms, may persist at a single site. One of plausible hypotheses is that a large number of spatially...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-016-0760-6
更新日期：2016-07-01 00:00:00
abstract：:Soil filamentous fungi play a prominent role in regulating ecosystem functioning in terrestrial ecosystems. This necessitates understanding their responses to climate change drivers in order to predict how nutrient cycling and ecosystem services will be influenced in the future. Here, we provide a quantitative synthes...
journal_title：Microbial ecology
pub_type： 杂志文章,meta分析
doi：10.1007/s00248-016-0795-8
更新日期：2016-08-01 00:00:00
abstract：:Dilute soda lakes are among the world's most productive environments and are usually dominated by dense blooms of cyanobacteria. Up to now, there has been little information available on heterotrophic bacterial abundance, production, and their controlling factors in these ecosystems. In the present study the main envi...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-002-2041-9
更新日期：2003-07-01 00:00:00
abstract：:Ecological transformations derived from habitat fragmentation have led to increased threats to above-ground biodiversity. However, the impacts of forest fragmentation on soils and their microbial communities are not well understood. We examined the effects of contrasting fragment sizes on the structure and functioning...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-015-0584-9
更新日期：2015-05-01 00:00:00
abstract：:Pseudomonas fluorescens strains are used in agriculture as plant growth-promoting rhizobacteria (PGPR). Nontarget effects of released organisms should be analyzed prior to their large-scale use, and methods should be available to sensitively detect possible changes in the environments the organism is released to. Acco...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-009-9489-9
更新日期：2009-05-01 00:00:00
abstract：:Sediment input to the Illinois River has drastically decreased river depth and reduced habitats for aquatic organisms. Dredging is being used to remove sediment from the Illinois River, and the dredged sediment is being applied to the surface of a brownfield site in Chicago with the goal of revegetating the site. In o...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-008-9410-y
更新日期：2009-01-01 00:00:00
abstract：:Simulation modeling has been an integral, albeit ad hoc, component of the field of aquatic microbial ecology for the past two decades. One of the most critical steps in simulation modeling is the initial formulation of a clear set of questions and goals. It is doubtful that a single generic model could be constructed ...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/BF00166823
更新日期：1994-09-01 00:00:00
abstract：:Bacterial symbionts are increasingly recognised as mediators of ecologically important traits of their animal hosts, with acquisition of new traits possible by uptake of novel symbionts. The entomopathogenic nematode Heterorhabditis downesi associates with two bacterial symbionts, Photorhabdus temperata subsp. tempera...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-016-0829-2
更新日期：2017-01-01 00:00:00
abstract：:The effect of freeze-thaw (FT) cycles on Arctic tundra soil bacterial community was studied in laboratory microcosms. FT-induced changes to the bacterial community were followed over a 60-day period by terminal restriction fragment length polymorphism (T-RFLP) profiles of amplified 16S rRNA genes and reverse transcrib...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-009-9516-x
更新日期：2009-10-01 00:00:00
abstract：:Invasive terrestrial isopods are likely to have altered leaf litter decomposition processes in North American forests, but the mechanisms underlying these alterations and the degree to which they differ among isopod species are poorly characterized. Using mixed-deciduous leaf litter microcosms, we quantified the effec...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-020-01527-4
更新日期：2020-10-01 00:00:00
abstract：:The relationship between groundwater geochemistry and microbial community structure can be complex and difficult to assess. We applied nonlinear and generalized linear data analysis methods to relate microbial biomarkers (phospholipids fatty acids, PLFA) to groundwater geochemical characteristics at the Shiprock urani...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-004-0137-0
更新日期：2006-02-01 00:00:00
abstract：:Proteus spp. bacteria were first described in 1885 by Gustav Hauser, who had revealed their feature of intensive swarming growth. Currently, the genus is divided into Proteus mirabilis, Proteus vulgaris, Proteus penneri, Proteus hauseri, and three unnamed genomospecies 4, 5, and 6 and consists of 80 O-antigenic serogr...
journal_title：Microbial ecology
pub_type： 杂志文章,评审
doi：10.1007/s00248-015-0720-6
更新日期：2016-11-01 00:00:00
