Abstract：
:The essential oil (EO) from the roots of Plectranthus barbatus Andr. (Syn. Coleus forskohlii Briq.) was evaluated for quorum sensing (QS) inhibitory activity. P. barbatus EO was screened for inhibition of QS regulated violacein production in Chromobacterium violaceum (ATCC 12472) wild-type strain. At inhibitory (6.25% v/v) and sub-inhibitory concentrations (3.125% v/v) of the EO, dose-dependent response in the inhibition of violacein production was observed in C. violaceum. Similarly, sub-MIC (6.25% v/v) of P. barbatus EO disrupted QS regulated biofilm formation by 27.87% and inhibited swarming and twitching motility in Pseudomonas aeruginosa PA01 implying its anti-infective and QS modulatory activity. Fluorescence microscopy studies confirmed the disruption of biofilm formation by EO in P. aeruginosa PAO1. Promising antibacterial activity was recorded at concentrations as low as 3.12% v/v for Listeria monocytogenes (ATCC 13932) and at 6.25% v/v for both Salmonella enterica subsp. enterica serovar Typhimurium (ATCC 25241) and Escherichia coli (ATCC 11775). Furthermore, significant dose-dependent inhibition was observed for biofilm formation and motility in all the tested pathogens in different treated concentrations. GC-MS analysis revealed α-pinene, endo-borneol, bornyl acetate, 1-Hexyl-2-Nitrocyclohexane as the major phytoconstituents. P. barbatus EO or its constituent compounds with QS modulatory, antimicrobial and biofilm inhibitory property could be potential new-age dietary source based intervention and preservation technologies.
journal_name
Arch Microbioljournal_title
Archives of microbiologyauthors
Chatterjee B,Vittal RRdoi
10.1007/s00203-020-02171-9subject
Has Abstractpub_date
2021-01-20 00:00:00eissn
0302-8933issn
1432-072Xpii
10.1007/s00203-020-02171-9pub_type
杂志文章abstract：:Gas chromatography-mass spectrometry studies of the nitrogen isotopic composition of the N-trifluoroacetyl n-butyl ester derivatives of the amino acids from isolated hydrolyzed cyanophycin from 15N-enriched cells led to two major findings: (1) the amino acid composition of this granular polypeptide, isolated using pro...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/BF00314469
更新日期：1994-01-01 00:00:00
abstract：:Mycothiol (MSH) plays important roles in maintaining cytosolic redox homeostasis and in adapting to reactive oxygen species in the high-(G + C)-content Gram-positive Actinobacteria. However, its physiological roles are ill defined compared to glutathione, the functional analog of MSH in Gram-negative bacteria and most...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s00203-013-0889-3
更新日期：2013-06-01 00:00:00
abstract：:The anaerobic fungus Piromyces sp. strain E2 produces extracellular cellulolytic enzymes present both in a high molecular mass (HMM) complex or as individual proteins. Although the HMM complex was present in the culture fluid during all growth stages, the highest amounts of complex were obtained when cultures were har...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：
更新日期：1997-02-01 00:00:00
abstract：:This study compared rhizobacterial communities in pepper greenhouses under a paddy-upland (rice-pepper) rotational system (PURS) and a monoculture repeated cropping system (RCS) and examined adverse effects of high salinity on soil properties. The following soil properties were analyzed: electrical conductivity (EC), ...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s00203-016-1304-7
更新日期：2017-03-01 00:00:00
abstract：:The characteristics of an in vitro polyuridylic acid dependent amino acid incorporating system prepared from germinating macroconidia of Microsporum canis are described. The incorporation of 14C-phenylalanine into polyphenylalanine is dependent on S-30 extract, adenosine triphosphate, magnesium ions and polyuridylic a...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/BF00413276
更新日期：1979-01-16 00:00:00
abstract：:Beta-Lactamase (penicillinase) activity was found in a number of strains of blue-green algea. In some cases, this enzyme permitted algae to overcome the inhibitory effects of penicillin. Production and localization of beta-lactamase were studied in a unicellular species, Coccochloris elabens (strain 7003), and in a fi...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/BF00429338
更新日期：1977-03-01 00:00:00
abstract：:Mesorhizobium tianshanense is a nitrogen-fixing bacterium that can establish symbiotic associations with Glycyrrhiza uralensis in the form of root nodules. Nodule formation in rhizobia often requires various secreted carbohydrates. To investigate exopolysaccharide (EPS) production and function in M. tianshanense, we p...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s00203-007-0345-3
更新日期：2008-05-01 00:00:00
abstract：:Effect of acidic condition on the fermentation characteristics was investigated by the continuous culture of Escherichia coli. In accordance with down-regulation of crp gene transcript level as well as up-regulation of arcA, the expressions of the TCA cycle genes were down-regulated, which caused more acetate formatio...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s00203-012-0861-7
更新日期：2013-03-01 00:00:00
abstract：:Light-limited batch cultures of Synechococcus spp. strains PCC 6301 and WH 8103 exhibited a positive correlation between the specific growth rate and the cellular content of both RNA and DNA. The ratio of RNA to DNA increased with the growth rate in Synechococcus sp. strain WH 8103, as it does in heterotrophic bacteri...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s002030050634
更新日期：1998-09-01 00:00:00
abstract：:This is the first report of intranuclear microfilaments within gametangial nuclei of oömycetous fungi. Longitudinal sections of four to six microfilaments were frequently observed in meiotic antheridial nuclei of Achlya ambisexualis. Each microfilament measured approximately 7--10 nm in diameter. Spindle tubules (25 n...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/BF00427876
更新日期：1976-02-01 00:00:00
abstract：:The fine structure of the Gram-negative filamentous gliding bacterium, Herpetosiphon is described. The outer membrane of the cell envelope could not be resolved as a separate structure, probably because it is fused with the underlying dense (peptidoglycan) layer. There was an additional wall layer outside this membran...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/BF00428379
更新日期：1975-03-10 00:00:00
abstract：:Cadmium is a non-essential toxic heavy metal for organisms, including plants and cyanobacteria. Cadmium resistance transporters involved in resistance of cells against various toxicants such as drugs and effluxes cytotoxic compounds from cells. However, cadmium resistance-associated protein (CadD) has never been repor...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s00203-017-1462-2
更新日期：2018-04-01 00:00:00
abstract：:The morphogenesis of plasmodium in Didymium megalosporum was observed for the first time by hanging drop culture and 3 % oat-agar culture under controlled conditions. The development of plasmodium was characteristic formation process of phaneroplasmodium. The mature plasmodium was white yellow or yellow green in color...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s00203-014-0971-5
更新日期：2014-05-01 00:00:00
abstract：:In the fermentation of L-aspartate by a free-living Campylobacter spec., the products formed were acetate, succinate, carbon dioxide and ammonia. The oxidative part of the fermentation pathway yielded acetate, succinate, carbon dioxide and ammonia, and the reductive part gave rise to the formation of succinate and amm...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/BF00689359
更新日期：1978-04-27 00:00:00
abstract：:The effect of intestinal molecules produced by the host on the virulence of Pseudomonas fluorescens is poorly documented. In the present work, we evaluated the secretion of human β-defensin-2 (hBD-2) by enterocytes after infection with P. fluorescens (a species previously suggested to be involved in inflammatory bowel...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s00203-012-0865-3
更新日期：2013-03-01 00:00:00
abstract：:Two styrene monooxygenase types, StyA/StyB and StyA1/StyA2B, have been described each consisting of an epoxidase and a reductase. A gene fusion which led to the chimeric reductase StyA2B and the occurrence in different phyla are major differences. Identification of SMOA/SMOB-ADP1 of Acinetobacter baylyi ADP1 may enlig...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s00203-014-1022-y
更新日期：2014-12-01 00:00:00
abstract：:The diversity among 45 cyanobacterial isolates from 11 different Gunnera species originating from different geographical areas was examined. By means of polymerase chain reaction (PCR) fingerprinting with short tandemly repeated repetitive (STRR) sequences as primers, ten groups of symbiotic cyanobacteria and five uni...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s002039900113
更新日期：2000-02-01 00:00:00
abstract：:Upland rice is an ecotype crop resulting from the long-term domestication and evolution of rice in dry land without a water layer. Generally, the stems and leaves are thick and luxuriant, while the leaves also typically broad and light. The root system is developed with abundant root hair, and the osmotic pressure of ...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s00203-020-02058-9
更新日期：2020-09-29 00:00:00
abstract：:An alkaliphilic actinobacterial strain, designated Hz 6-5T, was isolated from saline-alkaline soil from Songnen Plain in north-eastern China. The isolate formed light yellow-colored colonies and its cells were Gram-staining positive, non-motile, and non-spore-forming short rods. The strain was aerobic with optimal gro...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s00203-020-02073-w
更新日期：2020-10-26 00:00:00
abstract：:Calcium is essential for the growth of rhizobia and the formation of nitrogen-fixing root-nodules on legumes, but its precise role in these processes remains unknown. We have found that Rhizobium fredii USDA208 accumulates a major 38 kDa protein when grown in media supplemented with 0.3-2 microM Cacl2. We have purifie...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/BF00248480
更新日期：1993-01-01 00:00:00
abstract：:NAD-linked lactate dehydrogenases specific for the D- and L-lactate have been demonstrated in a number of strains of unicellular cyanobacteria. The D-lactate dehydrogenase of one strain (Synechococcus 6716) was partially purified and its properties were studied. The enzyme has a molecular weight of ca. 115000-120000...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/BF00447300
更新日期：1975-06-20 00:00:00
abstract：:The induction of the enzyme activities involved in butane metabolism in Pseudomonas butanovora was characterized. P. butanovora was grown on butane or its metabolites, both singly and in mixtures with other growth substrates. Cells grown in each of the butane metabolites readily consumed the growth substrate and downs...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s002030100304
更新日期：2001-07-01 00:00:00
abstract：:Pseudomonas cepacia grew rapidly using a mixture of all three branched chain amino acids as carbon source, but failed to use individual branched chain amino acids as sole carbon source. Extracts of bacteria grown on branched chain amino acids had between 2- and 3-fold higher levels of alpha-ketoglutarate-dependent bra...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/BF00423069
更新日期：1979-03-12 00:00:00
abstract：:A highly efficient method of transposon mutagenesis was developed for genetic analysis of Xanthobacter autotrophicus Py2. The method makes use of a transposon delivery vector that encodes a hyperactive Tn 5 transposase that is 1,000-fold more active than the wild-type transposase. In this construct, the transposase is...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s00203-002-0442-2
更新日期：2002-09-01 00:00:00
abstract：:A monoclonal antibody obtained by immunization of mice with heat-killed cells of Listeria monocytogenes serotype 4d showed reactivity towards a protein (P45) from L. monocytogenes with an apparent molecular mass of 45 kDa. This protein was detected in the culture supernatant and at the cell surface of L. monocytogenes...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s002030050003
更新日期：2000-01-01 00:00:00
abstract：:Aquaspirillum magnetotacticum MS-1 cells cultured microaerobically (dissolved O2 tension 1% of saturation), expressed proteins with superoxide dismutase (SOD) activity. The majority (roughly 95%) of total cell superoxide dismutase activity was located in the cell periplasm with little or no activity in the cell cytopl...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/BF00425171
更新日期：1989-01-01 00:00:00
abstract：:Many pathogenic bacteria express filamentous appendages, termed pili, on their surface. These organelles function in several important bacterial processes, including mediating bacterial interaction with, and colonization of the host, signalling events, locomotion, DNA uptake, electric conductance, and biofilm formatio...
journal_title：Archives of microbiology
pub_type： 杂志文章,评审
doi：10.1007/s00203-015-1117-0
更新日期：2015-08-01 00:00:00
abstract：:An Arthrobacter sp. growing on 4-Chlorobenzoic acid as its sole source of carbon excretes 4-hydroxygenzoic acid and protocatechuic acid into the culture medium. Protocatechuic acid is further attacked by "meta"-cleavage. During growth of the Arthrobacter sp. on benzoic acid cis-cis muconic acid can be isolated from th...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/BF00690235
更新日期：1976-11-02 00:00:00
abstract：:Photosynthetic, nitrogen-fixing Anabaena strains play an important role in the carbon and nitrogen cycles in tropical paddy fields although they are salt sensitive. Improvement in salt tolerance of Anabaena cells by expressing glycine betaine-synthesizing genes is an interesting subject. Due to the absence of choline ...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/s00203-012-0824-z
更新日期：2012-11-01 00:00:00
abstract：:For the low molecular weight laccases II and III of Podospora anserina the kinetic parameters Michaelis constant (KM) and maximum reaction velocity (V) were determined polarographically under pH optimum conditions for representative substrates of different substitution patterns. Laccase II showed two peaks in its pH o...
journal_title：Archives of microbiology
pub_type： 杂志文章
doi：10.1007/BF00446663
更新日期：1977-02-04 00:00:00
