Rethinking Phage Ecology by Rooting it Within an Established Plant Framework

Area of Science:

• Microbiology
• Ecology
• Bioinformatics

Background:

• Bacteriophages are crucial to microbial ecosystems, yet lack a comprehensive ecological classification system.
• Existing frameworks do not capture phage ecological strategies or interactions with bacterial hosts.
• Plant ecological strategies are classified using the Competitiveness-Stress-Ruderal (CSR) framework.

Purpose of the Study:

• To establish a broad ecological framework for bacteriophages.
• To classify bacteriophage ecological strategies based on transcriptional profiles.
• To provide a foundation for understanding phage roles in ecosystems and applications.

Main Methods:

• Repurposed the plant CSR framework for bacteriophage analysis.
• Hypothesized that phage transcription phases (early, middle, late) correlate with C, S, and R strategies.
• Analyzed 42 published phage transcriptomes to categorize phages based on gene expression profiles.

Main Results:

• Bacteriophages were successfully categorized into discrete CSR types based on their transcriptional profiles.
• Early gene expression correlated with competitive strategies (host defense suppression).
• Mid-phase expression linked to stress tolerance (resource management).
• Late-phase expression associated with ruderal strategies (regeneration after disturbance).

Conclusions:

• The adapted CSR framework provides a novel ecological classification for bacteriophages.
• Phage transcriptional patterns offer insights into their ecological strategies and functions.
• This framework has implications for phage therapy and microbial community manipulation.