We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effect of Cd on phosphate solubilizing abilities and hydrogen peroxide production of soil-borne micromycetes isolated from Phragmites australis-rhizosphere.
- Authors
Zúñiga-Silva, Jose; Chan-Cupul, Wilberth; Kuschk, Peter; Loera, Octavio; Aguilar-López, Ricardo; Rodríguez-Vázquez, Refugio
- Abstract
The aims of this work were to evaluate the phosphate-solubilization and hydrogen peroxide (HO) 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) on both variables. Our results showed that P. italicum achieved a higher P-solubilization and HO production than A. japonicus and P. dipodomyicola, as only P. italicum showed a positive correlation (R = 0.71) between P-solubilization and HO production. In dose-response assays, P. italicum was also more tolerant to Cd (0.31 mM) in comparison to A. japonicus (0.26 mM). Analysis of the 2 factorial experimental design showed that P-solubilization by P. italicum was negatively affected by increases in Cd ( p = 0.04) and yeast extract ( p = 0.02) in the culture medium. The production of HO was positively affected only by glucose ( p = 0.002). Fungal biomass production was reduced significantly ( p = 0.0009) by Cd and increased ( p = 0.0003) by high glucose concentration in the culture medium. The tolerance and correlation between P-solubilization and HO production in the presence of Cd was strain and species dependent. The effects of Cd, 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 and may be an alternative for manufacture of biofertilizers to replace chemical fertilizers.
- Subjects
PHYSIOLOGICAL effects of cadmium; SOLUBILIZATION; HYDROGEN peroxide; PHOSPHATES analysis; MICROFUNGI; PHRAGMITES australis
- Publication
Ecotoxicology, 2016, Vol 25, Issue 2, p367
- ISSN
0963-9292
- Publication type
Article
- DOI
10.1007/s10646-015-1595-5