Antimicrobial activities of an oxygenated cyclohexanone derivative isolated from Amphirosellinia nigrospora JS-1675 against various plant pathogenic bacteria and fungi

2019 ◽  
Vol 126 (3) ◽  
pp. 894-904 ◽  
Author(s):  
H.T. Nguyen ◽  
S. Kim ◽  
N.H. Yu ◽  
A.R. Park ◽  
H. Yoon ◽  
...  
Keyword(s):  
Pathogenic Bacteria ◽  
Antimicrobial Activities ◽  
Plant Pathogenic Bacteria ◽  
Bacteria And Fungi ◽  
Cyclohexanone Derivative

scholarly journals Antimicrobial Activities of Marine Sponge-Associated Bacteria

2021 ◽  
Vol 9 (1) ◽  
pp. 171
Author(s):  
Yitayal S. Anteneh ◽  
Qi Yang ◽  
Melissa H. Brown ◽  
Christopher M. M. Franco
Keyword(s):  
Pathogenic Bacteria ◽  
South Australia ◽  
Multidrug Resistant ◽  
Antimicrobial Activities ◽  
Marine Sponges ◽  
Bioactive Metabolites ◽  
Human Pathogens ◽  
Sponge Associated Bacteria ◽  
Microbial Symbionts ◽  
Bacteria And Fungi

The misuse and overuse of antibiotics have led to the emergence of multidrug-resistant microorganisms, which decreases the chance of treating those infected with existing antibiotics. This resistance calls for the search of new antimicrobials from prolific producers of novel natural products including marine sponges. Many of the novel active compounds reported from sponges have originated from their microbial symbionts. Therefore, this study aims to screen for bioactive metabolites from bacteria isolated from sponges. Twelve sponge samples were collected from South Australian marine environments and grown on seven isolation media under four incubation conditions; a total of 1234 bacterial isolates were obtained. Of these, 169 bacteria were tested in media optimized for production of antimicrobial metabolites and screened against eleven human pathogens. Seventy bacteria were found to be active against at least one test bacterial or fungal pathogen, while 37% of the tested bacteria showed activity against Staphylococcus aureus including methicillin-resistant strains and antifungal activity was produced by 21% the isolates. A potential novel active compound was purified possessing inhibitory activity against S. aureus. Using 16S rRNA, the strain was identified as Streptomyces sp. Our study highlights that the marine sponges of South Australia are a rich source of abundant and diverse bacteria producing metabolites with antimicrobial activities against human pathogenic bacteria and fungi.

In vitro assessment of N-(benzyl)chitosan derivatives against some plant pathogenic bacteria and fungi

2009 ◽  
Vol 45 (1) ◽  
pp. 237-245 ◽  
Author(s):  
Entsar I. Rabea ◽  
Mohamed E.I. Badawy ◽  
Walter Steurbaut ◽  
Christian V. Stevens
Keyword(s):  
Pathogenic Bacteria ◽  
Chitosan Derivatives ◽  
Plant Pathogenic Bacteria ◽  
In Vitro Assessment ◽  
Bacteria And Fungi

scholarly journals Draft Genome Sequence of Amphirosellinia nigrospora JS-1675, an Endophytic Fungus from Pteris cretica

2019 ◽  
Vol 8 (20) ◽  
Author(s):  
Jongbum Jeon ◽  
Sook-Young Park ◽  
Jung A. Kim ◽  
Nan Hee Yu ◽  
Ae Ran Park ◽  
...  
Keyword(s):  
Genome Sequence ◽  
Endophytic Fungus ◽  
Pathogenic Bacteria ◽  
Draft Genome ◽  
Draft Genome Sequence ◽  
Content Type ◽  
Plant Pathogenic Bacteria ◽  
Pteris Cretica ◽  
Bacteria And Fungi ◽  
First Time

The fungus Amphirosellinia nigrospora strain JS-1675 has been reported to exert antimicrobial effects against various plant-pathogenic bacteria and fungi. Here, we report the draft genome sequence of A. nigrospora for the first time.

scholarly journals Isolation and Identification of Saccharomyces cerevisiae from Caterpillar Frass and their Probiotic Characterization

2019 ◽  
Vol 16 (1) ◽  
pp. 179-186 ◽  
Author(s):  
Ujwala Vinayak Khisti ◽  
Suyash Arun Kathade ◽  
Mayur Arjun Aswani ◽  
Pashmin Kaur Anand ◽  
Nirichan Kunchirman Bipinraj
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Pathogenic Bacteria ◽  
Antimicrobial Activities ◽  
Yeast Cells ◽  
Isolation And Identification ◽  
Yeast Cultures ◽  
Isolation And Characterization ◽  
Wide Range ◽  
Probiotic Yeast ◽  
Bacteria And Fungi

Probiotics are live microorganisms which upon ingestion confer health benefits to the host and are widely applied for human and animal welfare. The present study reports the isolation of yeast cells from caterpillar frasses and its probiotic characterization. Out of four yeast cultures isolated, all found to be non-hemolytic and cultures designated as CV-I, CV-II CV-III and CV-IV showed good bile tolerance at 1.2%. These cultures possessed the ability to grow pH range of 1.5 – 10, exhibited auto-aggregation and co-aggregation capabilities, which are essential for growth in alimentary canal and reduction of pathogen adherence on the intestinal epithelial cells. All cultures exhibited good tolerance to temperature up to 42°C. Isolate CV-I showed wide range of antimicrobial activities against pathogenic bacteria and fungi. This study is the first report of isolation and characterization of probiotic yeast from caterpillar frass. The isolate CV-I has been identified as Saccharomyces cerevisiae by molecular methods. This culture is an ideal candidate for further probiotic exploration.

In-Vitro Cytotoxicity, Antimicrobial activities and DNA binding studies, of Novel Copper (II) complex with Heterocyclic base

2021 ◽  
pp. 3051-3055
Author(s):  
Shalini V. ◽  
Deepika R. ◽  
Arumugham M. N
Keyword(s):  
Dna Binding ◽  
Pathogenic Bacteria ◽  
Spectroscopic Method ◽  
Antimicrobial Activities ◽  
In Vitro Cytotoxicity ◽  
Binding Studies ◽  
Heterocyclic Base ◽  
Heterocyclic Ligand ◽  
Bacteria And Fungi

A novel ternary copper (II) complex have been synthesized by the addition of N, N-heterocyclic ligand with L-amino acid. The copper (II) complex, [Cu(1,10-phen) (L-Thr) Br] (where phen=1,10-phenanthroline and Threo=Threonine) characterized by various spectroscopic method. The intense UV band around 271nm was due to π-π* transition. The DNA binding study of these copper (II) complex are examined by UV–Visible, Emission spectroscopic, cyclic voltammetric and viscosity method. The results revealed that complex shown to be a intercalation mode of binding into DNA. The anticancer activity of Cu (II) complexes has capability to the kill HepG2 liver cancer cell as assessed by the MTT method, The Ic50value was found 21.50µg/ml The biological activity of the complex tested against certain pathogenic bacteria and fungi results revealed it was found to be potent antibacterial agent.

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