Abstract:
:Cr(VI) is a highly toxic metal produced by anthropogenic activity which may impact the environment, affecting plants and animals. In plants, chromium both as Cr(III) or Cr(VI) can be absorbed by roots, is poorly translocated and affects negatively plant growth. Plants used in phytoremediation need to cope with chromium toxicity. This work aimed to evaluate strains of Ochrobactrum tritici and Nitrospirillum amazonense, resistant and modified in order to become chromate whole-cell biosensors, as plant-protectors enabling plants to withstand contaminated soils. In vitro tests were performed in three rice varieties and one maize variety. Initial evaluations of Cr(VI) toxicity to plants showed that plants had different sensitivities and BRS 6 CHUÍ rice variety was the most resistant. The metal affected plant growth and development, essentially in roots which were totally inhibited in rice varieties at 500 μM. This effect was plant-dependent. Modified N. amazonense proved to protect maize plants independently of the inoculation dose but O. tritici showed plant specificity and some toxicity when inoculated at high numbers, inhibiting rice development but not maize. Inoculants were directly responsible for growth improvements of specific plant varieties at 1.25 ppm Cr(VI), a concentration which corresponds to a weak soil contamination. Improvements were observed relatively to the Cr(VI)-treated controls, but also relative to the untreated controls, i.e., the benefits went beyond a simple neutralization of inhibition brought by Cr(VI) toxicity.
journal_name
World J Microbiol Biotechnoljournal_title
World journal of microbiology & biotechnologyauthors
Francisco R,Branco R,Schwab S,Baldani JI,Morais PVdoi
10.1007/s11274-017-2389-0subject
Has Abstractpub_date
2017-12-18 00:00:00pages
12issue
1eissn
0959-3993issn
1573-0972pii
10.1007/s11274-017-2389-0journal_volume
34pub_type
杂志文章abstract::Anaplasma phagocytophilum, the causative agent of human granulocytic anaplasmosis, is an obligate intra-cellular bacterium that survives in neutrophils by delaying apoptosis. The human promyelocytic leukemia cell line HL-60 has been the ultimate choice for culturing Anaplasma in vitro. In this study, we assessed the v...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-011-0745-z
更新日期:2011-11-01 00:00:00
abstract::Common reed (Phragmites australis) and narrow-leaved cattail (Typha angustifolia L.) are two plant species used widely in artificial wetlands constructed to treat wastewater. In this study, the community structure and diversity of root-associated bacteria of common reed and narrow-leaved cattail growing in the Beijing...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-013-1316-2
更新日期:2013-08-01 00:00:00
abstract::A strain of Pleurotus ostreatus was grown in tomato pomace as sole carbon source for production of laccase. The culture of P. ostreatus revealed a peak of laccase activity (147 U/L of fermentation broth) on the 4th day of culture with a specific activity of 2.8 U/mg protein. Differential chromatographic behaviour of l...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-011-0813-4
更新日期:2012-01-01 00:00:00
abstract::Strain improvement by genetic manipulation or optimization of fermentation conditions for overproduction of vitamin B(12) has a drawback due to feed back inhibition. To resist the feed back inhibition by analogues of vitamin B(12) in Propionibacterium freudenrechii subsps. shermanii (OLP-5), we have tested with microb...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-012-1011-8
更新日期:2012-05-01 00:00:00
abstract::We characterized the culturable, heterotrophic bacterial community in soil collected from a former alpine military site contaminated with petroleum hydrocarbons. The physiologically active eubacterial community, as revealed by fluorescence-in situ-hybridization, accounted for 14.9 % of the total (DAPI-stained) bacteri...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-013-1594-8
更新日期:2014-06-01 00:00:00
abstract::We investigated the potential production and desiccation tolerance of microsclerotia (MS) by Brazilian strains of Metarhizium anisopliae (Ma), M. acridum (Mc) and M. robertsii (Mr). These fungi were grown in a liquid medium containing 16 g carbon l⁻¹ with a carbon:nitrogen ratio of 50:1. One hundred milliliters cultur...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-013-1581-0
更新日期:2014-05-01 00:00:00
abstract::Aureobasidium pullulans NRRL 6220 synthesized polysaccharide most actively in media containing sucrose, fructose or maltose with (NH4)2SO4 (0.6 g/l) or ammonium acetate giving greatest yields of the polysaccharide. With (NH4)2SO4 at ≥1.2 g/l, production of polysaccharide was decreased considerably. Polysaccharide prod...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF00144465
更新日期:1994-07-01 00:00:00
abstract::Fossil fuels consumption impacts the greenhouse gas emissions. Biofuels are considered as alternative renewable energy sources to reduce the fossil fuels dependency. Bioethanol produced by recombinant microorganisms is a widely suggested alternative to increase the yield in fermentation processes. However, ethanol and...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-019-2769-8
更新日期:2019-11-20 00:00:00
abstract::At 5 g/l, ferulic acid, a plant cell-wall phenolic, severely repressed growth of the lignocellulose-degrading fungi Trichoderma harzianum, Chaetomium cellulolyticum, Phanaerochaete chrysosporium, Trametes versicolor and Pleurotus sajor-caju. At 0.5 g/l, howerver, it slightly stimulated growth of the latter two organis...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF00327792
更新日期:1996-01-01 00:00:00
abstract::Iron deficiency ends up into several unavoidable consequences including damaging oxidative stress in cyanobacteria. NtcA is a global nitrogen regulator controls wide range of metabolisms in addition to regulation of nitrogen metabolism. In present communication, NtcA based regulation of iron homeostasis, ROS productio...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-017-2323-5
更新日期:2017-08-01 00:00:00
abstract::Growth at 25°C and pH 5.50 favour the production ofβ-glucosidase. De-fatted oilseed flour and Tween 80 enhanced the production ofβ-glucosidase, Lactose, gentibiose, gentibiose-acetate, laminarabiose and xylobiose inducedβ-glucosidase activity. Precipitation of the culture filtrate with (NH4)2SO4 resulted in 26-fold pu...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF02310911
更新日期:1991-01-01 00:00:00
abstract::In the present work, novel heterotrophic nitrifying and aerobic denitrifying bacteria have been isolated from greenwater system of coastal aquaculture. Based on the 16S rRNA gene, FAME analysis and biochemical test, the isolates have been identified as Pseudomonas aeruginosa and Achromobacter sp. These have been named...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-013-1543-6
更新日期:2014-04-01 00:00:00
abstract::Lactic acid bacteria (LAB) isolated from different sources (dairy products, fruits, fresh and fermented vegetables, fermented cereals) were screened for antimicrobial activity against other bacteria, including potential pathogens and food spoiling bacteria. Six strains have been shown to produce bacteriocins: Lactococ...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-014-1671-7
更新日期:2014-09-01 00:00:00
abstract::Andrimid, a known non-ribosomal pseudo-peptide antibiotic, was isolated from a psychrotolerant Serratia proteamaculans strain. The antibiotic peptide was produced at low temperature (8 °C) in a 7.5 l BIOFLO 101 bioreactor under batch culture mode. Andrimid activity from S. proteamaculans culture was only detected at 2...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-013-1338-9
更新日期:2013-10-01 00:00:00
abstract::Carbapenem-resistant Enterobacteriaceae isolates by carbapenemase production are being reported globally with increasing frequency, leading to limited therapeutic options. We therefore developed a loop-mediated isothermal amplification method with hydroxynaphthol blue dye (LAMP-HNB) for rapid confirmation of bla NDM, ...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-017-2295-5
更新日期:2017-07-01 00:00:00
abstract::In the two-component system of NisRK from Lactococcus lactis, the production of nisin is affected by transmembrane NisK and activation of intracellular NisR. The transcription of nisin structural genes can be induced by derivatives of nisin. NisR activation leads to the activation of nisA/Z transcription, which encode...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-019-2735-5
更新日期:2019-10-25 00:00:00
abstract::Mercury-resistance genes were detected byin situ hybridization using new synthetic oligonucleotide probes specific formerA andmerB genes according to the published sequences of the corresponding enzymes. These DNA probes were used for the detection of specific mercury-resistant microorganisms isolated from the Rhine R...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF01200680
更新日期:1992-01-01 00:00:00
abstract::Sweet potato residue, a starchy agricultural waste, was used as a substrate to produce oxytetracycline byStreptomyces rimosus TM-55 in a solid-state fermentation. Oxytetracycline was detected on the third day, reached its maximum value on the sixth day and remained constant to the twentieth day. Optimal conditions for...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF01201291
更新日期:1990-09-01 00:00:00
abstract::Psychrophiles are organisms that thrive in cold environments. One of the strategies for their cold adaptation is the ability to synthesize cold-adapted enzymes. These enzymes usually display higher catalytic efficiency and thermolability at lower temperatures compared to their mesophilic and thermophilic counterparts....
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-009-0295-9
更新日期:2010-07-01 00:00:00
abstract::The bioleachings of chalcopyrite ore were compared after inoculating different cultures enriched from the original acid mine drainage sample. The results showed that the higher bioleaching performance was achieved for inoculation with the enrichment D (0.5 % S, 2 % iron and 1 % chalcopyrite) compared to other enrichme...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-012-1179-y
更新日期:2013-02-01 00:00:00
abstract::In appropriate environments containing 2-monochloropropionic acid (2MCPA), mutations in a population of nondehalogenatingPseudomonas putida, strain PP40-040 (parent population), resulted in the formation of 2mcpa(+) papillae as a result of the decryptification of adehII gene. Increasing the size of the parent populati...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF00704646
更新日期:1995-03-01 00:00:00
abstract::Brucellae are Gram-negative intracellular bacterial pathogens that infect humans and animals, bringing great economic burdens to developing countries. Live attenuated Brucella vaccines (strain M5-90 or others) are the most efficient means for prevention and control of animal brucellosis. However, these vaccines have s...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-016-2015-6
更新日期:2016-04-01 00:00:00
abstract::In order to study the mechanisms regulating the phenanthrene degradation pathway and the intermediate-metabolite accumulation in strain S. paucimobilis 20006FA, we sequenced the genome and compared the genome-based predictions to experimental proteomic analyses. Physiological studies indicated that the degradation inv...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-017-2391-6
更新日期:2017-12-06 00:00:00
abstract::Elicitation is one of the few strategies that find commercial application in the enhancement of secondary metabolite production from plants as well as cell culture systems. Due to their immense medicinal value, production of saponins in suspension cultures has been attempted by many researchers. Gymnema sylvestre is a...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-011-0870-8
更新日期:2012-02-01 00:00:00
abstract::The competitiveness of fourRhizobium sp. strains infectingAcacia senegal and originating in the Sudan was assessed in a growth chamber experiment using Sudanese soil, WhenAcacia senegal was inoculated with pure cultures of the strains, there were statistically significant differences among the strains with respect to ...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF01195848
更新日期:1992-03-01 00:00:00
abstract::Alkaliphilic halotolerant cyanobacterium Aphanothece halophytica showed optimal growth in the medium containing 0.5 M NaCl. The increase of exogenously added glycine to the medium up to 10 mM significantly promoted cell growth under both normal (0.5 M NaCl) and salt stress (2.0 M NaCl) conditions. Salt stress imposed ...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-014-1790-1
更新日期:2015-02-01 00:00:00
abstract::Chymosin can specifically break down the Phe105-Met106 peptide bond of milk κ-casein to form insoluble para-κ-casein, resulting in milk coagulation, a process that is used in making cheese. In this study, in order to obtain an alternative milk coagulant which is safe and efficient, and simultaneously can produce chees...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-012-1012-7
更新日期:2012-05-01 00:00:00
abstract::Synthetic dyes are extensively used in textile dyeing, paper, printing, colour photography, pharmaceutics, cosmetics and other industries. Among these, azodyes represents the largest and most versatile class of synthetic dyes. As high as 50% of the dyes are released into the environment during manufacture and usage. T...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-011-0874-4
更新日期:2012-03-01 00:00:00
abstract::A chemically defined medium called KGm medium was used to isolate from a sample of sea water a bacterial strain, MW3A, capable of using N-3-oxohexanoyl-L: -homoserine lactone as the sole carbon source. MW3A was clustered closely to Pseudomonas aeruginosa by 16S ribosomal DNA sequence analysis. It degraded both N-acylh...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-011-0836-x
更新日期:2012-02-01 00:00:00
abstract::A variant ofLactobacillus hilgardii was immobilized by its own production of dextran gel, forming grains. The best rate of weight increase of the gel in continuous fermentation was 16.3±3.3%/h, at pH 4.8±0.1 and with a dilution rate of 0.22 to 0.26/h. Observation by scanning electron microscopy located most of the bac...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF01198752
更新日期:1992-07-01 00:00:00