In vitro toxic effects of heavy metals on fungal growth and phosphate-solubilising abilities of isolates obtained from Phragmites australis rhizosphere
| Autor: | Wilberth Chan-Cupul, Octavio Loera, Refugio Rodríguez Vázquez, Jose Roberto Zúñiga-Silva, Beatriz Xoconostle-Cázares, Ricardo Aguilar-López |
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| Rok vydání: | 2015 |
| Předmět: |
0301 basic medicine
Rhizosphere Ecology Metal ions in aqueous solution 030106 microbiology Biology Phosphate Penicillium italicum Phragmites 03 medical and health sciences chemistry.chemical_compound Horticulture medicine.drug_formulation_ingredient chemistry Penicillium dipodomyicola Botany medicine General Earth and Planetary Sciences Ecotoxicology Ecology Evolution Behavior and Systematics Mycelium General Environmental Science |
| Zdroj: | Chemistry and Ecology. 32:49-67 |
| ISSN: | 1029-0370 0275-7540 |
| DOI: | 10.1080/02757540.2015.1111876 |
| Popis: | In this research, we evaluated the toxic effect of metal ions on mycelial growth and phosphate-solubilising activity of soil-borne micromycetes isolated from the Phragmites australis rhizosphere using Pikovskaya-agar plates supplemented with four metal concentrations. The diameter growth rate (DGR) decreased as the metal concentration rise for all tested fungi. Trichoderma atroviride had the fastest growth rate (1.48 cm2 day−1) and was the least susceptible to Al3+, Cd2+, Cr3+, Cu2+ and Pb2+ with a median effective concentration (MEC50) of 12.19, 0.48, 4.51, 11.44 and 50.05 mM, respectively. Aspergillus japonicus was the most tolerant to Co2+, Ni2+ and Zn2+, with MEC50 values of 3.36, 1.095 and 2.34 mM, respectively. Penicillium italicum was the most tolerant to Cr6+ (MEC50 = 0.677 mM). The ability to solubilise phosphate remained, despite the decrease in the DGR, and P. italicum and Penicillium dipodomyicola had the highest Phosphate Solubilisation Indexes (PSIs) at 1.97 and 2.12, respectively. I... |
| Databáze: | OpenAIRE |
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