Analytical electron microscopy of Bacterionema matruchotii calcification

Area of Science:

• Microbiology
• Biomineralization
• Microbial Calcification

Background:

• Bacterionema matruchotii is a filamentous bacterium known to undergo calcification.
• Understanding the initial stages of microbial calcification is crucial for various applications, including biomaterials and understanding pathological calcification.

Purpose of the Study:

• To investigate the early morphological and elemental characteristics of calcification in Bacterionema matruchotii.
• To determine the sequence of mineral phases during the initial stages of calcification.

Main Methods:

• Analytical electron microscopy was employed to study calcification.
• Elemental analyses were performed to identify the composition of mineral deposits.

Main Results:

• Early electron densities were observed in association with metachromatic granules and bacterial cell membranes.
• Amorphous calcium phosphate was identified as the initial mineral phase.
• Apatite formation was detected subsequent to the appearance of amorphous calcium phosphate.

Conclusions:

• The initial phase of calcification in Bacterionema matruchotii involves electron-dense structures linked to cellular components.
• The biomineralization process in this bacterium proceeds through amorphous calcium phosphate before forming crystalline apatite.