Related Experiment Video
Updated: Mar 18, 2026
08:21
Isolation and Screening from Soil Biodiversity for Fungi Involved in the Degradation of Recalcitrant Materials
Published on: May 16, 2022
6.0K
Isolation, Identification and Characterization of Two Aluminum-Tolerant Fungi from Acidic Red Soil
Genhe He1, Xiaodong Wang2, Genhong Liao1
1School of Life Sciences, Key Laboratory of Biology Diversity and Ecological Engineering of Jiangxi Province, Jinggangshan University, Ji'an, China.
Indian Journal of Microbiology
|July 14, 2016
Summary
Two fungal strains isolated from acidic soil exhibit extreme aluminum tolerance. These microbes may resist aluminum by preventing cellular uptake and chelating it externally with secreted metabolites.
Area of Science:
- Microbiology
- Environmental Science
- Biochemistry
Background:
- Acidic soils often contain high aluminum (Al) concentrations, limiting plant growth.
- Microbial resistance to aluminum is crucial for understanding soil ecosystems and developing biotechnological applications.
Purpose of the Study:
- To isolate and characterize aluminum-resistant fungi from acidic red soil.
- To investigate the mechanisms of aluminum resistance in selected fungal strains.
Main Methods:
- Isolation of fungi from aluminum-rich acidic soil.
- Determination of fungal tolerance to varying aluminum concentrations and pH levels.
- Morphological and molecular (26S rDNA) identification of fungal strains.
- Analysis of aluminum accumulation and distribution within fungal cells and the surrounding medium.
Main Results:
- Eight fungal strains were isolated, with two (S4 and S7) showing extreme tolerance to 550 mmol L(-1) aluminum at pH 3.11-3.20.
- Strain S4, identified as Eupenicillium, accumulated more aluminum and showed greater growth limitation than strain S7 (unclassified Trichocomaceae).
- Evidence suggests external chelation of aluminum by secreted metabolites and prevention of cellular uptake as resistance mechanisms.
Conclusions:
- Fungi from acidic soils possess significant aluminum resistance capabilities.
- Strain S4 and S7 demonstrate distinct aluminum resistance strategies, involving external metabolite secretion and potentially reduced cellular uptake.
- These findings contribute to understanding microbial adaptation in metal-stressed environments and offer potential for bioremediation applications.
