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Bacteria produce a single endospore internally. The spore is sometimes surrounded by a thin covering known as the exosporium, which overlies the spore coat. The spore coat, which acts like a sieve that excludes large toxic molecules like lysozyme, is resistant to many toxic molecules and may also contain enzymes that are involved in germination.
In trilete spores, each spore shows three narrow lines radiating from a center pole. [8] This shows that four spores shared a common origin and were initially in contact with each other forming a tetrahedron. [3] A wider aperture in the shape of a groove may be termed a colpus. [8] The number of colpi distinguishes major groups of plants.
The spore-forming bacteria can again be divided based on their respiration: Bacillus is a facultative anaerobe, while Clostridium is an obligate anaerobe. [18] Also, Rathybacter , Leifsonia , and Clavibacter are three gram-positive genera that cause plant disease.
The genus Bacillus was named in 1835 by Christian Gottfried Ehrenberg, to contain rod-shaped (bacillus) bacteria. He had seven years earlier named the genus Bacterium. Bacillus was later amended by Ferdinand Cohn to further describe them as spore-forming, Gram-positive, aerobic or facultatively anaerobic bacteria. [14]
As a model organism, B. subtilis is commonly used in laboratory studies directed at discovering the fundamental properties and characteristics of Gram-positive spore-forming bacteria. [29] In particular, the basic principles and mechanisms underlying formation of the durable endospore have been deduced from studies of spore formation in B ...
Endospore-forming bacteria can cause disease; for example, anthrax can be contracted by the inhalation of Bacillus anthracis endospores, and contamination of deep puncture wounds with Clostridium tetani endospores causes tetanus, which, like botulism, is caused by a toxin released by the bacteria that grow from the spores. [101]
These bacteria are both spore-forming and biofilm-forming, ... Below is a list of differential techniques and results that can help to identify B. cereus from other ...
Bacillus – a genus of spore-forming rod shaped bacteria first described in 1835 [13] Spirochaeta – thin spiral shaped bacteria first described in 1835 [13] Spirillum – spiral shaped bacteria first described in 1832 [14] etc. die Lepomoneren (with envelope) Protomonas – now classed as a eukaryote and not a bacterium.