Microbiology Procedure
  Home  Link to us  Resources  Site map  Search  Language

Index >> Bacterial Structure >> Endospore Formation

Endospore Formation

Endospore Formation - Sporulation in Bacillus takes place only under aerobic conditions, while in Clostridium it is strictly anaerobic.

The morphological and biochemical events characterising sporulation are brought about when an essential growth metabolite goes down below a certain level.

Vegeta­tive growth and division cease during sporulation. An asymmetric cell division which brings about spore formation occurs, producing a forespore within the mother cell.

Endospores show no detectable metabo­lism. They can remain in a state of extreme dormancy for long periods, and are tolerant td heat, radiation and bactericidal agents.

Sporulation has been divided into a number of stages (Ryter, Ionesco and Schaeffer, 1961; Schaeffer, Ionesco, Ryter and Balassa,1963; Ryter. 1965)

Fitz-James. 1965). In Bacillus 8ubti/i$ the vegetative cell is represented as stage 0, and the different stages of sporulation as stages I to VII (Figs. 11.27 and 11.28).

In the following description the figures given after each stage represent the time in hours.

Home | Site map | Submit Article | Resources | Search