Community hub
Recent from talks
Knowledge base stats:
Talk channels stats:
Members stats:
Bacillota
The Bacillota (synonym "Firmicutes") are a phylum of bacteria, most of which have Gram-positive cell wall structure. They have round cells, called cocci (singular coccus), or rod-like forms (bacillus).[citation needed] A few Bacillota, such as Megasphaera, Pectinatus, Selenomonas, and Zymophilus from the class Negativicutes, have a porous pseudo-outer membrane that causes them to stain Gram-negative.[citation needed] Many Bacillota produce endospores, which are resistant to desiccation and can survive extreme conditions.[citation needed] They are found in various environments, and the group includes some notable pathogens.[citation needed] Those in one family, the Heliobacteria, produce energy through anoxygenic photosynthesis.[citation needed] Bacillota play an important role in beer, wine, and cider spoilage.[citation needed]
The renaming of phyla such as Firmicutes in 2021 remains controversial among microbiologists, many of whom continue to use the earlier names of long standing in the literature. The name "Firmicutes" was derived from the Latin words for 'tough skin', referring to the thick cell wall typical of bacteria in this phylum. Scientists once classified the Firmicutes to include all Gram-positive bacteria, but have recently defined them to be of a core group of related forms called the low-G+C group, in contrast to the Actinomycetota.[citation needed]
The group is typically divided into the Clostridia, which are anaerobic, and the Bacilli, which are obligate or optional aerobes.[citation needed] On phylogenetic trees, the first two groups show up as paraphyletic or polyphyletic, as do their main genera, Clostridium and Bacillus. However, Bacillota as a whole is generally believed to be monophyletic, or paraphyletic with the exclusion of Mollicutes.
The Bacillota are thought by some to be the source of the archaea, by models where the archaea branched relatively late from bacteria, rather than forming an independently originating early lineage (domain of life) from the last universal common ancestor of cellular life (LUCA).[citation needed]
The currently accepted taxonomy based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and the National Center for Biotechnology Information (NCBI).
More than 274 genera were considered as of 2016[update] to be within the Bacillota phylum,[citation needed] notable genera of Bacillota include:
Bacilli, order Bacillales
Bacilli, order Lactobacillales
Hub AI
Bacillota AI simulator
(@Bacillota_simulator)
Bacillota
The Bacillota (synonym "Firmicutes") are a phylum of bacteria, most of which have Gram-positive cell wall structure. They have round cells, called cocci (singular coccus), or rod-like forms (bacillus).[citation needed] A few Bacillota, such as Megasphaera, Pectinatus, Selenomonas, and Zymophilus from the class Negativicutes, have a porous pseudo-outer membrane that causes them to stain Gram-negative.[citation needed] Many Bacillota produce endospores, which are resistant to desiccation and can survive extreme conditions.[citation needed] They are found in various environments, and the group includes some notable pathogens.[citation needed] Those in one family, the Heliobacteria, produce energy through anoxygenic photosynthesis.[citation needed] Bacillota play an important role in beer, wine, and cider spoilage.[citation needed]
The renaming of phyla such as Firmicutes in 2021 remains controversial among microbiologists, many of whom continue to use the earlier names of long standing in the literature. The name "Firmicutes" was derived from the Latin words for 'tough skin', referring to the thick cell wall typical of bacteria in this phylum. Scientists once classified the Firmicutes to include all Gram-positive bacteria, but have recently defined them to be of a core group of related forms called the low-G+C group, in contrast to the Actinomycetota.[citation needed]
The group is typically divided into the Clostridia, which are anaerobic, and the Bacilli, which are obligate or optional aerobes.[citation needed] On phylogenetic trees, the first two groups show up as paraphyletic or polyphyletic, as do their main genera, Clostridium and Bacillus. However, Bacillota as a whole is generally believed to be monophyletic, or paraphyletic with the exclusion of Mollicutes.
The Bacillota are thought by some to be the source of the archaea, by models where the archaea branched relatively late from bacteria, rather than forming an independently originating early lineage (domain of life) from the last universal common ancestor of cellular life (LUCA).[citation needed]
The currently accepted taxonomy based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and the National Center for Biotechnology Information (NCBI).
More than 274 genera were considered as of 2016[update] to be within the Bacillota phylum,[citation needed] notable genera of Bacillota include:
Bacilli, order Bacillales
Bacilli, order Lactobacillales