Biosorption of copper by endophytic fungi isolated from Nepenthes ampullaria

Letters in Applied Microbiology
C WongM Müller

Abstract

Copper (Cu) tolerance was observed by endophytic fungi isolated from the carnivorous plant Nepenthes ampullaria (collected at an anthropogenically affected site, Kuching city; and a pristine site; Heart of Borneo). The fungal isolates, capable of tolerating Cu up to 1000 ppm (11 isolates in total), were identified through molecular method [internal transcribed spacer 4+5 (ITS4+5); ITS1+NL4; β-tubulin region using Bt2a + Bt2b], and all of them grouped with Diaporthe, Nigrospora, and Xylaria. A Cu biosorption study was then carried out using live and dead biomass of the 11 fungal isolates. The highest biosorption capacity of using live biomass was achieved by fungal isolates Xylaria sp. NA40 (73·26 ± 1·61 mg Cu per g biomass) and Diaporthe sp. NA41 (72·65 ± 2·23 mg Cu per g biomass), NA27 (59·81 ± 1·15 mg Cu per g biomass) and NA28 (56·85 ± 4·23 mg Cu per g biomass). The fungal isolate Diaporthe sp. NA41 also achieved the highest biosorption capacity of 59·33 ± 0·15 mg g-1 using dead biomass. The living biomass possessed a better biosorption capacity than the dead biomass (P < 0·05) and the roadside fungal strains showed higher Cu biosorption capacities using live biomass compared to the jungle fungal strains (P < 0·05). Our stud...Continue Reading

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Citations

Feb 14, 2020·Environmental Science and Pollution Research International·Ana Gabriela Contreras-CortésMaribel Plascencia-Jatomea
Aug 14, 2020·Letters in Applied Microbiology·Kalu Ram SharmaRakesh Kumar Sharma

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