Confocal Raman Microscopy Quantitatively Reveals Subcellular Metabolic Adaptation Mechanisms of Deep-Sea Mussels to...

Area of Science:

• Marine Biology
• Biogeochemistry
• Ecosystem Dynamics

Background:

• Methane hydrates are a potential energy source, but their extraction poses risks to deep-sea ecosystems.
• Understanding biological responses to methane fluctuations in cold seeps is limited due to challenges in real-time metabolic monitoring.
• Deep-sea mussels harbor symbionts and rely on methane from cold seeps.

Purpose of the Study:

• To investigate subcellular metabolic adaptations in deep-sea mussels under methane deficiency.
• To assess the impact of methane fluctuations on the metabolic and structural homeostasis of these organisms.
• To demonstrate a novel method for real-time, noninvasive metabolic tracking in deep-sea environments.

Main Methods:

• Application of confocal Raman microscopy combined with full-spectrum normalization.
• Label-free, nondestructive, high-resolution quantitative analysis of biomolecules in gill tissues.
• Monitoring subcellular metabolic dynamics and structural reorganization in response to methane deficiency.

Main Results:

• Methane deficiency induced significant metabolic reprogramming and structural reorganization in mussel gill tissues.
• Energy metabolism was disrupted, while proteolysis and lipolysis were enhanced.
• Spatial heterogeneity in cellular recovery and degradation indicated differential resilience among cells.

Conclusions:

• Methane is crucial for maintaining metabolic and structural homeostasis in deep-sea mussels.
• Findings provide insights into adaptation strategies under methane deficiency and ecological impacts of methane extraction.
• The methodology offers broad potential for real-time metabolic monitoring and evaluating environmental disturbance effects.