Asexual Reproduction: Spore Forming Bacteria

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Spore forming bacteria

Introduction

The spore formation is kind of asexual reproduction which happens when the environmental conditions around the Bactria become not suitable for it and for protection too.

Spores all the time haploid and unicellular and are generated by meiosis in the sporangium of a diploid sporophyte. Under convenient conditions the spore can use mitotic division to promote into a new organism, which produce a multicellular gametophyte, which eventually goes on to produce gametes. Zygote been formed from Two gametes, which develops into a new sporophyte. This cycle is known as alternation of generations.

Type of bacterial spores

Endospores

Endospores, are powerful against harsh chemical and physical conditions. This gives the ability to the bacteria to resist disinfectants, radiation, desiccation and heat. Bacillus are a big reason for food and medical contamination and are often difficult to get rid of them. endosporulation process start When a bacterium detects unfavorable environmental conditions, which takes eight hours long. The DNA is replicated and a membrane wall known as a spore septum begins to form between it and the rest of the cell. The plasma membrane of the cell surrounds this wall and pinches off to leave a double membrane around the DNA, and the developing structure is now known as a forespore. Calcium dipicolinate, is a molecule of calcium and dipicolinic acid, that is incorporated into the forespore during this time. The dipicolinic acid helps stabilize the proteins and DNA in the endospore. Next the peptidoglycan cortex forms between the two layers and the bacterium adds a spore coat to the outside of the forespore. In the final stages of endospore formation the newly f...

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... B. cereus and other aerobic endospore formers are introduced via vegetables, fruits, or herbs and spices, while anaerobic spore formers like nonproteolytic Clostridium botulinum and Clostridium estertheticum pose safety and spoilage risks in chilled packaged foods, respectively.

References

microbeonline. Available at: http://microbeonline.com/bacterial-spores-structure-importance-and-examples-of-spore-forming-bacteria/ (Accessed: 24 April 2014).

Microbiology Books and Molecular Biology Books. Available at: http://www.horizonpress.com/spores (Accessed: 24 April 2014).

Cornell University Department of Microbiology. Available at: https://micro.cornell.edu/research/epulopiscium/bacterial-endospores (Accessed: 24 April 2014).

microbeworld. Available at: http://archives.microbeworld.org/know/spore.aspx (Accessed: 24 April 2014).

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