Variability of Coordination Complexes of Copper Accumulated Within Fungal Colony in the Presence of Copper-Containing Minerals

Фомiна, М. О.

doi:10.15407/biotech7.02.063

Cited by 2 publications

(4 citation statements)

References 20 publications

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Section: Resultsmentioning

confidence: 64%

“…Our findings about the darker central zone observed in the colony could be due to variable coordination of accumulated copper within the fungal colony, which depended on the age and physiological/reproductive state of the fungal mycelium . Fomina reported that the central part of A. niger colonies with mature aging mycelium and abundant conidiophores had darker coloring. The X‐ray absorption spectroscopy demonstrated that copper, accumulated within the outer zone of the fungal colony with immature vegetative mycelium, was coordinated with sulfur‐containing ligands, in contrast to copper coordination with phosphate ligands within the mature mycelium with profuse conidia in the central zone of the colony.…”

Section: Resultsmentioning

confidence: 64%

“…In general, the published results show an increased level of SOD and CAT activities in fungal cultures grown under Cu or Zn treatment . Apparently, the trend of changes in the antioxidant enzyme activity in A. fumigatus 3 2 cells exposed to Cu and Zn ions is concentration‐dependent: Their activity increases at low concentrations and decreases at higher concentrations.…”

Section: Resultsmentioning

confidence: 92%

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Cellular Response to Cu‐ and Zn‐Induced Oxidative Stress in Aspergillus fumigatus Isolated From Polluted Soils in Bulgaria

Krumova

Kostadinova

Miteva‐Staleva

et al. 2016

CLEAN Soil Air Water

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The fungal strain Aspergillus fumigatus 3 2 isolated from the tailings pond at the copper mine "Vlaykov vruh," Bulgaria, showed high tolerance to Cu 2þ and Zn 2þ . This study was designed to explore the relationship between Cu 2þ and Zn 2þ tolerance and cellular response to oxidative stress. The model strain was identified to species level by morphological and molecular methods. Fungal cultures were exposed to enhanced concentrations of metal ions. The effect of Cu 2þ and Zn 2þ was evaluated by the changes in fungal growth and morphology, the level of oxidative stress biomarkers, and the antioxidant activities of enzymes such as superoxide dismutase (SOD) and catalase (CAT). Two different cellular responses occurred: The concentrations of up to 500 mg/mL caused enhanced levels of oxidative stress biomarkers (glycogen and trehalose accumulation and oxidatively damaged protein content), as well as an increase in SOD and CAT activities. The treatment with concentrations from 500 to 2000 mg/mL led to enhanced glycogen consumption, accelerated proteolysis, and a decrease in SOD and CAT activities. The present results provide additional information about the participation of oxidative stress and antioxidant defense in enhanced tolerance of fungi isolated from metal-polluted soils. Probably, survival at extremely high concentrations also requires the participation of other defense mechanisms. Furthermore, the enhanced understanding of these processes will provide essential tools for efficient remediation practices.

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Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 92%

See 1 more Smart Citation

Cellular Response to Cu‐ and Zn‐Induced Oxidative Stress in Aspergillus fumigatus Isolated From Polluted Soils in Bulgaria

Krumova

Kostadinova

Miteva‐Staleva

et al. 2016

CLEAN Soil Air Water

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“…3b Studies have also shown that A. niger is widely distributed in soil and comprises an important component of the microbial population. This bacterium is capable of weathering black and micas, common feldspar, phosphate ore, olivine and copper ore tailings (Li, 2015a;Lian, 2008;Sun et al, 2014;Li et al, 2015b, c;Diao et al, 2015;Fomina, 2014), and can corrode P2O5, K2O and other elements to promote the growth of crops (Dong and Lian, 2014). We show that A. niger can also efficiently weather granite in this analysis, and the dissolution quantity of SiO2 in the fermentation broth on day 30 was 7.05 times more than the control group (without A. niger) (Table 2).…”

Section: Sem Observations Of Granite Surface Changesmentioning

confidence: 99%

The Influence of Environmental Factors on Aspergillus Niger Granite Weathering

Wu¹,

Hu²

2019

Appl. Ecol. Env. Res.

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In order to explore the effects and influence of environmental factors on microbial restoration of waste rock, an efficient rock-weathering strain Aspergillus niger XF-1 was isolated from a granite face. Concentrations of SiO2 in nutrient solution at different temperatures, pH values, generation cycles, and vaccination quantities were measured using shake flask leaching and inductively coupled plasma optical emission spectrometer (ICP-OES) to analyze the grey correlation degree of weathering. The results reveal that the A. niger XF-1 strain can be used as a good fungal source for the restoration of degraded habitats in abandoned granite areas, and can also be used to promote the release of more Si elements in granite. Moreover, pH is the dominant factor affecting the weathering of granite by A. niger, followed by vaccination quantity and temperature, while generation cycle is the least important factor. The optimum temperature at which granite is weathered by A. niger was 28°C, the most appropriate pH value was 3, the most suitable generation was the fifth, and the optimum vaccination quantity was 10 7 (spore numbers mL -1 ).

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Variability of Coordination Complexes of Copper Accumulated Within Fungal Colony in the Presence of Copper-Containing Minerals

Cited by 2 publications

References 20 publications

Cellular Response to Cu‐ and Zn‐Induced Oxidative Stress in Aspergillus fumigatus Isolated From Polluted Soils in Bulgaria

Cellular Response to Cu‐ and Zn‐Induced Oxidative Stress in Aspergillus fumigatus Isolated From Polluted Soils in Bulgaria

The Influence of Environmental Factors on Aspergillus Niger Granite Weathering

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