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Determination of the Glycogen Content in Cyanobacteria

Determination of the Glycogen Content in Cyanobacteria

Published on: July 17, 2017

Physiological and transcriptomic responses of Synechococcus to silicate availability.

Yueying Zhao¹, Xiaofang Liu¹, Yabo Han¹

¹Tianjin University of Science and Technology, Research Centre for Indian Ocean Ecosystem, Tianjin 300457, China.

Journal of Applied Microbiology

|April 22, 2026

Summary

This summary is machine-generated.

Marine Synechococcus shows sensitivity to silicate availability, influencing silicon accumulation and cellular processes. Different strains exhibit unique acclimation strategies, advancing our understanding of silicon

Keywords:

Synechococcus biogenic silica marine silicon-carbon cycle photosynthetic physiology transcriptome

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Area of Science:

Marine microbiology
Biogeochemical cycles
Trace element metabolism

Background:

Silicon (Si) accumulation in marine Synechococcus is increasingly recognized.
The physiological and regulatory mechanisms of Si accumulation in marine environments are poorly understood.
Synechococcus growth rates are typically insensitive to silicate levels, yet Si accumulation occurs.

Purpose of the Study:

To investigate the physiological and molecular responses of Synechococcus to varying silicate availability.
To elucidate the mechanisms underlying silicon accumulation in marine Synechococcus strains.
To compare the acclimation strategies of coastal and marine Synechococcus strains to silicate.

Main Methods:

Integrated physiological, biochemical, and transcriptomic analyses were performed.
Two Synechococcus strains (coastal and marine) were cultured under silicate-depleted and silicate-repleted conditions.
Gene expression and cellular changes were analyzed in response to silicate addition.

Main Results:

Silicate addition increased biogenic silica (BSi) in both strains.
Photosynthetic parameters were enhanced in one strain, while carotenoid content decreased in the other.
Transcriptomic analysis revealed silicate-modulated photosynthesis, oxidative phosphorylation, ribosomal gene expression, and membrane transport, with strain-specific patterns.

Conclusions:

Synechococcus exhibits significant physiological and molecular sensitivity to environmentally relevant silicate concentrations.
Strain-specific acclimation strategies to silicate availability are linked to ecological origins.
This study provides initial insights into silicon accumulation mechanisms in Synechococcus, highlighting the need for further kinetic studies.