Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 26, Issue 8, Pages 7863-7872Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-019-04255-6
Keywords
Bioaccumulation efficacy; Cadmium toxicity; Growth pattern; Removal capacities; Spore germination
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Funding
- Ramin Agricultural and Natural Resources University (Ahvaz, Iran)
- Genetics and Agricultural Biotechnology Institute of Tabarestan (GABIT)
- Sari Agricultural Sciences and Natural Resources University (Sari, Iran)
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Six strains of Trichoderma spp. and Piriformospora indica have been studied for cadmium tolerance and bioaccumulation capacities by the poisoned food technique. A quantitative assay for Trichoderma spp. and P. indica was conducted in broth cultures supplemented with different cadmium concentrations (0-500mg/l). In addition, the growth pattern of P. indica was determined by growing the fungus in a solid medium amended with eight concentrations of cadmium (0-200mg/l). Generally, an increasing cadmium gradient in the culture medium suppressed the ability of fungi for cadmium accumulation. However, a negative relation was observed between the biomass production of fungi and cadmium uptake (q: mg/g biomass). Results showed that Trichoderma spp., especially T. simmonsii [UTFC 10063], are tolerant to cadmium toxicity and have a high ability to cadmium bioaccumulation. The biomass production of T. simmonsii [UTFC 10063] was significantly stimulated and increased by 46.1% when cadmium concentration increased from 0 to 125mg/l. Moreover, 91.7 and 31.2% of cadmium removal was observed at 10 and 500mg/l of the cadmium concentration, respectively. P. indica, however, showed a lower tolerance and removal efficiency for cadmium as compared with Trichoderma spp. Therefore, Trichoderma spp., especially T. simmonsii [UTFC 10063], can be exploited as potent bio-removal agents in cadmium-polluted aqueous solutions.
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