| Autor: |
Nyamsanjaa, Khulan, Genseki, Akira, Hatano, Tomohiro, Oyuntsetseg, Bolormaa, Narisawa, Kazuhiko, Watanabe, Makiko |
| Předmět: |
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| Zdroj: |
Chemistry & Ecology; Apr2024, Vol. 40 Issue 3, p276-291, 16p |
| Abstrakt: |
Aluminium toxicity may increase under low soil pH, and an increase in arsenic concentration in the soil may inhibit inorganic P uptake and influence fungal growth. This study investigated metals/metalloids accumulation in Cenococcum geophilum sclerotia collected from highly polluted forest soils affected by mining activities and smoke hazards. The Al and As concentrations in sclerotia were 11,700 ± 823 and 10.0 ± 1.29 mg kg−1, respectively. TOF-SIMS ion mapping confirmed the predominant presence of Al as Al oxalate, acetate, and hydroxides, and the segregation of As showed higher intensities for organic As ions than inorganic As. Ion fragments of Al and As compounds were widely observed in sclerotial medulla and were generally elevated towards the central part coexisting with phosphoric acid ions. The mechanism of Al and As accumulation has been discussed to involve two biotransformation pathways in terms of sclerotial development using 14C dating. Because the sclerotia were significantly older than the historical smoke hazard and Al and As concentrations in sclerotia were high regardless of age, their accumulation were more likely to be promoted in the mature stage. This study provides insight into the contribution of ectomycorrhizal fungi and their sclerotia to soil ecosystems under metals/metalloids toxicity. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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