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Updated: May 31, 2025

Methods for Characterizing the Co-development of Biofilm and Habitat Heterogeneity

Methods for Characterizing the Co-development of Biofilm and Habitat Heterogeneity

Published on: March 11, 2015

Biofilm Formation, Modulation, and Transcriptomic Regulation Under Stress Conditions in Halomicronema sp.

Marina Caldara^1,2, Henk Bolhuis³, Marta Marmiroli^1,2

¹Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy.

International Journal of Molecular Sciences

|January 25, 2025

Summary

This study characterized Halomicronema sp. biofilms, identifying key genes (wza1, wzt, luxR-05665) for extracellular polymeric substances (EPS) production and biofilm monitoring. The cyanobacterium exhibits stress tolerance and antioxidant properties.

Keywords:

EPS Halomicronema sp.biofilm formation cyanobacteria stress resilience transcriptomics

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Last Updated: May 31, 2025

Methods for Characterizing the Co-development of Biofilm and Habitat Heterogeneity

Methods for Characterizing the Co-development of Biofilm and Habitat Heterogeneity

Published on: March 11, 2015

Microtiter Dish Biofilm Formation Assay

Microtiter Dish Biofilm Formation Assay

Published on: January 30, 2011

A Semi-quantitative Approach to Assess Biofilm Formation Using Wrinkled Colony Development

A Semi-quantitative Approach to Assess Biofilm Formation Using Wrinkled Colony Development

Published on: June 7, 2012

Area of Science:

Microbiology
Environmental Science
Biotechnology

Background:

Bacteria form biofilms, complex matrices crucial for survival and environmental interaction.
Cyanobacteria biofilms possess unique traits like photosynthesis, nitrogen fixation, and stress adaptability.
Halomicronema sp. from brackish environments presents an interesting model for biofilm research.

Purpose of the Study:

To characterize the cyanobacterium Halomicronema sp. from a brackish environment.
To identify biomarkers for extracellular polymeric substances (EPS) production and biofilm formation.
To assess the cyanobacterium's resilience to abiotic stress and its antioxidant capabilities.

Main Methods:

Microscopic imaging
Phenolic content and antioxidant capacity determination
Chemical screening for biofilm inhibitors
Transcriptomic analysis (RNA sequencing, real-time PCR) focusing on EPS and transcription factors.

Main Results:

Identified wza1 and wzt genes as EPS biomarkers.
Identified luxR-05665 and TetR/AcrR, LysR family genes as potential biofilm monitoring biomarkers.
Demonstrated Halomicronema sp. tolerance to high salt and other abiotic stresses.
Confirmed significant antioxidant properties of the cyanobacterium.

Conclusions:

Halomicronema sp. biofilms are robust and adaptable.
Specific genes (wza1, wzt, luxR-05665) can serve as biomarkers for EPS and biofilm dynamics.
The cyanobacterium's stress tolerance and antioxidant capacity offer potential biotechnological applications.