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Selective partitioning of conidia of some Penicillium and Aspergillus species in aqueous two-phase systems
Abstract:
Conidia of Aspergillus fumigatus, Aspergillus flavus, Aspergillus niger, Penicillium brevi-compactum, Penicillium frequentans, Penicillium spinulosum, and Penicillium verrucosum var. cyclopium were subjected to partition at varying pH values in an aqueous two-phase system containing charged polyethylene glycol. In the system, the partition behavior of the conidia of the Penicillium species varied when the pH was raised, while the conidia of the Aspergillus species seemed unaffected. P. brevi-compactum was separated from P. verrucosum var. cyclopium after only 10 transfers when subjected to stepwise partitioning. In the same way, 10 transfers were needed to separate P. verrucosum var. cyclopium from a mixture of conidia of three Aspergillus species. The partition behavior was influenced by the culture media used.
Insights
This study demonstrates that pH-dependent partitioning in charged polyethylene glycol systems can effectively separate Penicillium conidia from Aspergillus conidia. This method shows promise for fungal species differentiation and purification.
Area of Science:
- Mycology
- Biotechnology
- Separation Science
Background:
- Fungal conidia, such as those from Aspergillus and Penicillium species, are important in various fields.
- Effective separation techniques are crucial for studying and utilizing these fungi.
- Aqueous two-phase systems offer a potential method for bioparticle separation.
Purpose of the Study:
- To investigate the partition behavior of Aspergillus and Penicillium conidia in a charged polyethylene glycol aqueous two-phase system.
- To evaluate the efficacy of pH manipulation for separating different fungal species.
- To determine the feasibility of using stepwise partitioning for isolating specific fungal conidia.
Main Methods:
- Conidia from Aspergillus fumigatus, A. flavus, A. niger, Penicillium brevi-compactum, P. frequentans, P. spinulosum, and P. verrucosum var. cyclopium were partitioned.
- Partitioning was performed in an aqueous two-phase system with charged polyethylene glycol at varying pH values.
- Stepwise partitioning was employed for species separation, and the influence of culture media was assessed.
Main Results:
- The partition behavior of Penicillium conidia varied significantly with changes in pH.
- Aspergillus conidia showed minimal changes in partition behavior across different pH values.
- P. brevi-compactum was successfully separated from P. verrucosum var. cyclopium in 10 transfers.
- P. verrucosum var. cyclopium was separated from a mixture of three Aspergillus species in 10 transfers.
- Culture media composition influenced the partition behavior of the conidia.
Conclusions:
- pH-dependent partitioning in charged polyethylene glycol systems is a viable method for differentiating and separating Penicillium conidia from Aspergillus conidia.
- Stepwise partitioning offers an efficient approach for isolating specific fungal species based on their differential partition behavior.
- The findings highlight the potential of this technique for fungal purification and analysis.