Endospore Formation Stage 1- Axial Filament Formation

Endospore Formation Stage 1- Axial Filament Formation

Endospore Formation Stage 1- Axial Filament Formation -

The first visible change during sporulation is the fusion of the two compact nuclear bodies and redistribution of nuclear material from end to end to form an axial chromatin thread called the axial filament.

The axial DNA structure could result from changes in intracellular solute and ion levels.

Each chromosome may be attached to the cell membrane by a mesoSome.

The cell undergoes elongation, as if about to undergo fission. In Bacillus spp. granules of poly-β-hydroxybutyrjc acid PHSI appear.

These granules represent stored food material, and sporulation can be completed in distilled water (endotrophic sporulation).

In Clostridium species there are no internal food reserves, and exogenous sources of food material are required for sporulation (exotrophic sporulation).

Protein turnover begins in the cell during stage I. Synthesis of, the enzymes amylase, protease and ribosidase also takes place during this stage.

In many spore-forming bacteria, both aerobic and anaerobic, synthesis of antimicrobial substances (antibiotics) takes place at the onset of sporulation in this stage.

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