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Effect of Cd⁺² on phosphate solubilizing abilities and hydrogen peroxide production of soil-borne micromycetes isolated from Phragmites australis-rhizosphere.
Zúñiga-Silva, Jose Roberto; Chan-Cupul, Wilberth; Kuschk, Peter; Loera, Octavio; Aguilar-López, Ricardo; Rodríguez-Vázquez, Refugio.
Affiliation
  • Zúñiga-Silva JR; Department of Biotechnology and Bioengineering, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Avenida Instituto Politécnico Nacional 2508, San Pedro Zacatenco, 07360, México, DF, Mexico.
  • Chan-Cupul W; Laboratorio de Fitopatología y Micología Aplicada, Facultad de Ciencias Biológicas y Agropecuarias, Universidad de Colima, Autopista Colima-Manzanillo km 40, C. P. 28100, Tecomán, Colima, México.
  • Kuschk P; Department of Environmental Biotechnology, Centre for Environmental Research Leipzig-Halle UFZ, Permoserstrasse15, 04318, Leipzig, Germany.
  • Loera O; Department of Biotechnology, Universidad Autónoma Metropolitana Iztapalapa, San Rafael Atlixco No. 186, Col. Vicentina, Iztapalapa, 09340, México, DF, Mexico.
  • Aguilar-López R; Department of Biotechnology and Bioengineering, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Avenida Instituto Politécnico Nacional 2508, San Pedro Zacatenco, 07360, México, DF, Mexico.
  • Rodríguez-Vázquez R; Department of Biotechnology and Bioengineering, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Avenida Instituto Politécnico Nacional 2508, San Pedro Zacatenco, 07360, México, DF, Mexico. rrodrig@cinvestav.mx.
Ecotoxicology ; 25(2): 367-79, 2016 Mar.
Article in En | MEDLINE | ID: mdl-26646403
The aims of this work were to evaluate the phosphate-solubilization and hydrogen peroxide (H2O2) production by the soil-borne micromycetes, Aspergillus japonicus, Penicillium italicum and Penicillium dipodomyicola, isolated from Phragmites australis rhizosphere and to study the effect of several concentrations of Cadmium (Cd(2+)) on both variables. Our results showed that P. italicum achieved a higher P-solubilization and H2O2 production than A. japonicus and P. dipodomyicola, as only P. italicum showed a positive correlation (R(2) = 0.71) between P-solubilization and H2O2 production. In dose-response assays, P. italicum was also more tolerant to Cd(2+) (0.31 mM) in comparison to A. japonicus (0.26 mM). Analysis of the 2(4) factorial experimental design showed that P-solubilization by P. italicum was negatively affected by increases in Cd(2+) (p = 0.04) and yeast extract (p = 0.02) in the culture medium. The production of H2O2 was positively affected only by glucose (p = 0.002). Fungal biomass production was reduced significantly (p = 0.0009) by Cd(2+) and increased (p = 0.0003) by high glucose concentration in the culture medium. The tolerance and correlation between P-solubilization and H2O2 production in the presence of Cd(2+) was strain and species dependent. The effects of Cd(2+), glucose, ammonium sulfate and yeast extract on those variables were evaluated through a two-level factorial design. P. italicum is promising for P-solubilization in soils contaminated with Cd(2+) and may be an alternative for manufacture of biofertilizers to replace chemical fertilizers.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Penicillium / Phosphates / Aspergillus / Soil Microbiology / Soil Pollutants / Cadmium / Poaceae / Hydrogen Peroxide Country/Region as subject: Mexico Language: En Journal: Ecotoxicology Journal subject: SAUDE AMBIENTAL / TOXICOLOGIA Year: 2016 Document type: Article Affiliation country: Mexico Country of publication: United States

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Penicillium / Phosphates / Aspergillus / Soil Microbiology / Soil Pollutants / Cadmium / Poaceae / Hydrogen Peroxide Country/Region as subject: Mexico Language: En Journal: Ecotoxicology Journal subject: SAUDE AMBIENTAL / TOXICOLOGIA Year: 2016 Document type: Article Affiliation country: Mexico Country of publication: United States