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1. Assessment of phenolic herbicide toxicity and mode of action by different assays

Author:
Marchetto, Davide,   et al.   ; Bettiol, Cinzia; De Vettori, Stefania; Minervini, Giovanni; Zuccon, Elisa; Ghirardini, Annamaria Volpi; Argese, Emanuele;     Show all 7 Authors
Source:
Environmental science and pollution research international 2016 v.23 no.8 pp. 7398-7408
ISSN:
0944-1344
Subject:
2,4-dinitrophenol; Lepidium sativum; Vibrio fischeri; bromoxynil; chloroxynil; dimethyl sulfoxide; dinoterb; hydrogen bonding; hydrophobicity; ioxynil; mechanism of action; oxidative phosphorylation; phytotoxicity; quantitative structure-activity relationships; root growth; seed germination; solvents; toxic substances
Abstract:
... A phytotoxicity assay based on seed germination/root elongation has been optimized and used to evaluate the toxic effects of some phenolic herbicides. The method has been improved by investigating the influence of experimental conditions. Lepidium sativum was chosen as the most suitable species, showing high germinability, good repeatability of root length measurements, and low sensitivity to seed ...
DOI:
10.1007/s11356-015-5958-5

2. A Rapid Electrochemical Procedure for the Detection of Hg(0) Produced by Mercuric-Reductase: Application for Monitoring Hg-resistant Bacteria Activity.

Author:
Marchetto, Davide,   et al.   ; Battistel, Dario; Baldi, Franco; Gallo, Michele; Daniele, Salvatore;     Show all 5 Authors
Source:
Environmental Science & Technology 2012 v.46 no.19 pp. 10675-10681
ISSN:
1520-5851
Subject:
NADP (coenzyme); Pseudomonas putida; Ruditapes philippinarum; aqueous solutions; bacteria; clams; electrochemistry; electrodes; gold; mercury; mercury(II) reductase; monitoring; nitric acid; potassium nitrate; sediments; tissues; traps; volatilization; Adriatic Sea; Italy
Abstract:
... In this work, gold microelectrodes are employed as traps for the detection of volatilized metallic mercury produced by mercuric reductase (MerA) extracted from an Hg-resistant Pseudomonas putida strain FB1. The enzymatic reduction of Hg (II) to Hg (0) was induced by NADPH cofactor added to the samples. The amount of Hg(0) accumulated on the gold microelectrode surface was determined by anodic stri ...
DOI:
10.1021/es301444a

3. Manila clams from Hg polluted sediments of Marano and Grado lagoons (Italy) harbor detoxifying Hg resistant bacteria in soft tissues

Author:
Marchetto, Davide,   et al.   ; Baldi, Franco; Gallo, Michele; Faleri, Claudia; Maida, Isabel; Fani, Renato;     Show all 6 Authors
Source:
Environmental Research 2013 v.125 pp. 188-196
ISSN:
0013-9351
Subject:
Actinobacteria; Bacillus (bacteria); Enterobacter; Enterococcus; Jeotgalicoccus; Raoultella; Ruditapes philippinarum; Staphylococcus; Stenotrophomonas; Vibrio; acclimation; bacteria; bioaccumulation; clams; endosymbionts; fluorescence in situ hybridization; genes; gills; glass; hepatopancreas; mercuric chloride; mercury; plasmids; ribosomal DNA; sediments; sequence analysis; spring; tissues; winter; Italy
Abstract:
... A mechanism of mercury detoxification has been suggested by a previous study on Hg bioaccumulation in Manila clams (Ruditapes philippinarum) in the polluted Marano and Grado lagoons and in this study we demonstrate that this event could be partly related to the detoxifying activities of Hg-resistant bacteria (MRB) harbored in clam soft tissues. Therefore, natural clams were collected in six statio ...
DOI:
10.1016/j.envres.2012.11.008

4. Bio-generated metal binding polysaccharides as catalysts for synthetic applications and organic pollutant transformations

Author:
Marchetto, Davide,   et al.   ; Baldi, Franco; Paganelli, Stefano; Piccolo, Oreste;     Show all 4 Authors
Source:
New biotechnology 2011 v.29 no.1 pp. 74-78
ISSN:
1871-6784
Subject:
Acinetobacter venetianus; Klebsiella oxytoca; acetates; anaerobic conditions; bacteria; biotransformation; carbon; catalysts; citrates; dehalogenation; energy; exopolysaccharides; hydrogen peroxide; iron; oxidation; palladium; phenol; pollutants; sodium
Abstract:
... Iron and palladium binding an exopolysaccharide (EPS) were obtained and purified from cultures of bacterial cells of Klebsiella oxytoca BAS-10. The strain BAS-10 was able to grow under anaerobic conditions with Fe(III)-citrate as energy and carbon source, producing Fe(III)-EPS that was extracted and used as catalyst in the oxidation reaction of phenol with H₂O₂. The same bacterial strain was culti ...
DOI:
10.1016/j.nbt.2011.04.012

5. Diatom quantification and their distribution with salinity brines in coastal sediments of Terra Nova Bay (Antarctica)

Author:
Marchetto, Davide,   et al.   ; Baldi, Franco; Facca, Chiara; Nguyen, Thi Nhu Mai; Spurio, Roberto;     Show all 5 Authors
Source:
Marine environmental research 2011 v.71 no.4 pp. 304-311
ISSN:
0141-1136
Subject:
Bacillariophyta; DNA; DNA primers; anions; biodiversity; cations; penguins; pigments; polymerase chain reaction; ribosomal RNA; salinity; sediments; Antarctica
Abstract:
... Benthic diatoms represent an important element of global nutritional productivity; to raise attention on their role, which is often neglected due to analytical difficulties, surface (1 cm top layer) coastal sediments from Gerlache inlet to Penguin Bay at Terra Nova Bay were collected and stored at −20 °C. DNA amplification by real-time PCR, based on diatom-specific oligonucleotide primers designed ...
DOI:
10.1016/j.marenvres.2011.02.005
PubMed:
21414661