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Soil fungi for mycoremediation of arsenic pollution in agriculture soils
Author(s) -
Singh M.,
Srivastava P.K.,
Verma P.C.,
Kharwar R.N.,
Singh N.,
Tripathi R.D.
Publication year - 2015
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1111/jam.12948
Subject(s) - bioaccumulation , biology , fusarium , arsenate , arsenic , bioremediation , soil contamination , soil water , soil microbiology , botany , contamination , chemistry , ecology , organic chemistry
Aims Soil arsenic (As) contamination of food‐chains and public health can be mitigated through fungal bioremediation. To enumerate culturable soil fungi, soils were collected from the As‐contaminated paddy fields (3–35 mg kg −1 ) of the middle Indo‐Gangetic Plains. Methods and Results Total 54 fungal strains were obtained and identified at their molecular level. All strains were tested for As tolerance (from 100 to 10 000 mg l −1 arsenate). Fifteen fungal strains, tolerant to 10 000 mg l −1 arsenate, were studied for As removal in‐vivo for 21 days by cultivating them individually in potato dextrose broth enriched with 10 mg l −1 As. The bioaccumulation of As in fungal biomass ranged from 0·023 to 0·259 g kg −1 . The biovolatilized As ranged from 0·23 to 6·4 mg kg −1 . Conclusions Higher As bioaccumulation and biovolatilization observed in the seven fungal strains, Aspergillus oryzae FNBR _L35; Fusarium sp. FNBR _B7, FNBR _ LK 5 and FNBR _B3; Aspergillus nidulans FNBR _ LK 1; Rhizomucor variabilis sp. FNBR _B9; and Emericella sp. FNBR _ BA 5. These fungal strains were also tested and found suitable for significant plant growth promotion in the calendula, withania and oat plants in a greenhouse based pot experiment. Significance and Impact of Study These fungal strains can be used for As remediation in As‐contaminated agricultural soils.