Abstract:
:Antimicrobial activity of silver nanoparticles (AgNPs) has been well documented in earlier studies. As their efficient role in combating phytopathogens has begun recently, there is a huge scope to explore their effectiveness in agriculture. Considering the strong antifungal activity of biosynthesized AgNPs (as reported in our previous study), our main aim is to elucidate their antibacterial activity against bacterial plant pathogens to authenticate their wide range of agricultural applications. The present manuscript highlights the potential role of biosynthesized AgNPs against Xanthomonas oryzae pv. oryzae (Xoo) causing disastrous sheath blight disease of rice worldwide. We observed strong antibacterial activity of biosynthesized AgNPs (size ~ 12 nm) against Xoo at 20, 30 and 50 µg/mL concentrations. The significant inhibitory impact of AgNPs on biofilm formation by Xoo was noted even at the lower dose of 5 µg/mL (p = 0.001). Maximum biofilm inhibition (p = 0.000) was caused at 50 µg/mL concentration of AgNPs in comparison to control. Furthermore, disease suppression by biosynthesized AgNPs was authenticated under greenhouse conditions. Foliar spray of AgNPs significantly reduced the blight symptoms in rice sheaths as shown by 9.25% DLA (% Diseased leaf area) as compared to 33.91% DLA in Xoo inoculated rice plants. Altogether, our data suggest that biosynthesized AgNPs based nanoformulation can be applied for successful management of blight disease of rice. In addition, the antibiofilm strategies instigated by AgNPs can be exploited against a wide range of bacterial phytopathogens. In light of rapidly emerging antibiotic-resistant microbial strains, the current work provides an alternate effective platform for the application of nanoformulation for augmenting sustainability in the agriculture.
journal_name
World J Microbiol Biotechnoljournal_title
World journal of microbiology & biotechnologyauthors
Mishra S,Yang X,Ray S,Fraceto LF,Singh HBdoi
10.1007/s11274-020-02826-1subject
Has Abstractpub_date
2020-03-16 00:00:00pages
55issue
4eissn
0959-3993issn
1573-0972pii
10.1007/s11274-020-02826-1journal_volume
36pub_type
杂志文章abstract::Of three molecular forms of polygalacturonases synthesized by Aspergillus alliaceus on glucose media, two were exopolygalacturonases (exoPG1 and exoPG2) and one was an endopolygalacturonase (endoPG). Low-methoxylated beet pectin was the preferred substrate for the endoPG and exoPG2 whereas pectic acid was the optimal ...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF00367111
更新日期:1995-05-01 00:00:00
abstract::Bacillus subtilis, isolated from tannery waste, produced an alkaline protease at optimal activity when grown in a casein/gelatine medium in a stirred tank fermenter at 37°C with the dissolved oxygen tension at 40% air saturation. Optimum protease activity (223 U ml(-1)) was at pH 8.5 and was stable for 1 h up to 45°C ...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF00360930
更新日期:1996-05-01 00:00:00
abstract::Here, three different suicide vectors were evaluated for the possibility of performing gene mutagenesis in strain OH11 using the chiA gene (accession number: DQ888611) as a new reporter. Suicide vector pEX18GM was selected, and it was successfully applied for disruption and in-frame deletions in the chiA gene in strai...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-011-0846-8
更新日期:2012-02-01 00:00:00
abstract::Tandem repeats of single short peptide sequences are useful for many purposes. Here we describe a method called ligation-PCR to construct DNA sequences encoding numerous tandem peptide repeats that can stably produce such repeats in both prokaryotic and eukaryotic cells. The method employs double-strand target monomer...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-012-1023-4
更新日期:2012-05-01 00:00:00
abstract::The rare actinomycetes strain 2EPS was isolated from soil and analysis of cultural, morphological characteristics, diaminopimelic acid content of its cell wall, and 16S rRNA gene sequence indicates that 2EPS belongs to genus Actinomadura. In addition, neighbor-joining phylogenetic tree also confirmed the relationships...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-014-1792-z
更新日期:2015-02-01 00:00:00
abstract::Paclitaxel is a highly toxic anticancer agent which is used in a wide range against ovarian, breast, lung, and prostate cancers. Paclitaxel is manufactured recently in the north of Iran which may lead to the introduction of the drug into the environment via pharmaceutical wastewater. To our knowledge, Paclitaxel degra...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-016-2087-3
更新日期:2016-08-01 00:00:00
abstract::The present study was conducted for optimization of in vitro substrates under aseptic conditions for interaction of Piriformospora indica with the medicinal plant Coleus forskohlii. It aims to test the effects of different substrates on P. indica colonization as well as growth parameters of the in vitro raised C. fors...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-013-1526-7
更新日期:2014-03-01 00:00:00
abstract::The present study deals with membrane-bound efflux pumps, MexAB-OprM and MexXY and their respective regulatory genes mexR, nalC, nalD and mexZ in multidrug resistant (MDR) Pseudomonas aeruginosa. Following antibiotic sensitivity testing and detection of various beta-lactamases, hyperexpression of efflux pump genes, me...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-018-2465-0
更新日期:2018-05-30 00:00:00
abstract::In this study, fennel oil was isolated by hydrodistillation, and the chemical composition was determined by gas chromatography/mass spectral analysis. The antimicrobial activity of fennel oil against Staphylococcus aureus was evaluated by broth microdilution. A haemolysis assay, tumour necrosis factor (TNF) release as...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-011-0939-4
更新日期:2012-04-01 00:00:00
abstract::An efficient expression-secretion system for heterologous protein production in food-grade hosts, Lactobacillus plantarum and Bacillus subtilis, is still required to broaden their applications. The optimal signal peptide compatible with both the desired protein and the target host is important for the system. Here, we...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-020-02932-0
更新日期:2020-09-19 00:00:00
abstract::Trichoderma asperellum parasitizes a large variety of phytopathogenic fungi. The mycoparasitic activity of T. asperellum depends on the secretion of complex mixtures of hydrolytic enzymes able to degrade the host cell wall and proteases which are a group of enzymes capable of degrading proteins from host. In this stud...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-013-1373-6
更新日期:2013-11-01 00:00:00
abstract::Identification of Clostridium botulinum is usually based on toxin detection of broth culture by mouse bioassay and requires 7 to 10 days to complete. Here, we describe an alternative in vitro procedure for direct identification of C. botulinum (types A and B) colonies which can be completed in 48 h. The method is base...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF00357557
更新日期:1994-01-01 00:00:00
abstract::A mixed culture of a chlorobenzoate-(3-CBA)-degradingPseudomonas aeruginosa, strain 3mT, and a phenol/cresols-degradingPseudomonas sp., strain CP4, simultaneously and efficiently degraded mixtures of 3-CBA and phenol/cresols. However, strains 3mT and CP4 usedortho- andmeta-ring cleavage pathways, respectively. Degrada...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF00704636
更新日期:1995-03-01 00:00:00
abstract::The fermentation of industrial bacteria encounters a serious problem in continuous culture, i.e. the production traits lose. However, current research on the mechanism of strain degeneration is not clear enough, and there are few methods to effectively control the degeneration. Under growth restriction, the mutation r...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章,评审
doi:10.1007/s11274-020-02901-7
更新日期:2020-07-18 00:00:00
abstract::Bacillus amyloliquefaciens strain WF02, isolated from soil collected at Wufeng Mountain, Taiwan, has siderophore-producing ability and in vitro antagonistic activity against bacterial wilt pathogen. To determine the impact of plant genotype on biocontrol effectiveness, we treated soil with this strain before infecting...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-016-2143-z
更新日期:2016-11-01 00:00:00
abstract::Anaerobic degradation of organic matter follows similar pathways in digesters and anaerobic freshwater sediments. The responsible microorganisms are linked in a complex food web, where short chain fatty acids and H2 are important intermediates. Degradation of short-chain fatty acids is endothermic under standard condi...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF00419463
更新日期:1996-09-01 00:00:00
abstract::Biotransformations have gained extensive importance in practical use as a support for chemical synthesis or in the conversion of natural products. Biotransformations may present an enlargement, a sequential degradation or a specific modification of synthetic or natural compounds. The tools for biotransformations are p...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF02421497
更新日期:1992-12-01 00:00:00
abstract::Polychlorinated biphenyls (PCBs) are typical lasting organic pollutants. Persistence and recalcitrance to biodegradation of PCBs have hampered the transformation of PCB congeners from the environment. Biological transformation of polychlorinated biphenyls could take place through anaerobic dechlorination, aerobic micr...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章,评审
doi:10.1007/s11274-020-02922-2
更新日期:2020-08-30 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::This work reports the production of MEL-A using coconut water as the carbon source. Proximate analysis of coconut water indicated the presence of nutrients necessary for growth of the organism and production of desired metabolite. The amount of MEL produced using coconut water was 3.85 g/L (± 0.35) with 74% of it bein...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-020-02857-8
更新日期:2020-06-05 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::The phenoloxidase (POx) activities of 1059 strains and species of micromycetes were determined on malt/agar medium. Overall, 600 (57%) of the isolates produced one or more POx. The sensitivity and specificity of the POx activities towards various substrates were used to group the isolates. Some 187 strains (31% of tho...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF00286360
更新日期:1995-09-01 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::The induction of laccase isoforms in Trametes versicolor HEMIM-9 by aqueous extracts (AE) from softwood and hardwood was studied. Samples of sawdust of Pinus sp., Cedrela sp., and Quercus sp. were boiled in water to obtain AE. Different volumes of each AE were added to fungal cultures to determine the amount of AE nee...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-013-1420-3
更新日期:2014-01-01 00:00:00
abstract::Opuntia ficus-indica Mill. (forage cactus) is farmed with relative success in the semi-arid region of the Brazilian northeast for commercial purposes, particularly as forage and food. Endophytic microorganisms are those that can be isolated inside plant tissues and can be a new source to production of enzymes with dif...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-011-1001-2
更新日期:2012-05-01 00:00:00
abstract::In this study, the carotenoids produced by the extremophile microorganisms Halococcus morrhuae, Halobacterium salinarium and Thermus filiformis were separated and identified by high-performance liquid chromatography connected to a diode array detector and a tandem mass spectrometer. The in vitro scavenging capacity of...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-011-0993-y
更新日期:2012-04-01 00:00:00
abstract::Cellulolytic fungi, 34 strains, were isolated from samples taken from palm oil mill residues and effluent, and high cellulase producers selected in comparison with nine known reference strains. Although 13 isolates showed good filter paper distintegration within 14 days, only eight isolates exhibited clearing zones ar...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF01238799
更新日期:1992-11-01 00:00:00
abstract::Biomass production of Cellulomonas was optimal with 1% (w/v) bagasse pith pre-treated with either 0.2 M NaOH for 1 h at 80°C or 0.4 M NaOH for 40 h at 28 to 30°C. Growth was similar to that obtained with a more severe treatment used as control and compared well with other reports for cellulolytic bacteria cultivated o...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF00327840
更新日期:1993-03-01 00:00:00
abstract::We studied the effects of quaternary bis-phosphonium and bis-ammonium salts of pyridoxine with lipophilic substituents on the survival and morphology of Staphylococcus aureus cells. We found that, while originating from the same base, they exhibit considerably different antimicrobial mechanisms. In the presence of Ca(...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/s11274-015-1969-0
更新日期:2016-01-01 00:00:00
abstract::Shewanella colwelliana, a marine bacterium isolated in association with the oyster Crassostrea virginica, produces an abundant exopolysaccharide with potential commercial value as an adhesive under aqueous conditions. Its utilization of glucose was modulated by stoichiometric concentrations of yeast extract. In Brain ...
journal_title:World journal of microbiology & biotechnology
pub_type: 杂志文章
doi:10.1007/BF00367663
更新日期:1994-09-01 00:00:00