Definitions for actinobacteria
acti·nobac·te·ri·a

WiktionaryRate this definition:0.0 / 0 votes

1. actinobacterianoun

   Plural form of actinobacterium.

WikipediaRate this definition:0.0 / 0 votes

1. Actinobacteria

   The Actinomycetota (or Actinobacteria) are a phylum of all gram-positive bacteria. They can be terrestrial or aquatic. They are of great economic importance to humans because agriculture and forests depend on their contributions to soil systems. In soil they help to decompose the organic matter of dead organisms so the molecules can be taken up anew by plants. While this role is also played by fungi, Actinomycetota are much smaller and likely do not occupy the same ecological niche. In this role the colonies often grow extensive mycelia, like a fungus would, and the name of an important order of the phylum, Actinomycetales (the actinomycetes), reflects that they were long believed to be fungi. Some soil actinomycetota (such as Frankia) live symbiotically with the plants whose roots pervade the soil, fixing nitrogen for the plants in exchange for access to some of the plant's saccharides. Other species, such as many members of the genus Mycobacterium, are important pathogens. Beyond the great interest in Actinomycetota for their soil role, much is yet to be learned about them. Although currently understood primarily as soil bacteria, they might be more abundant in fresh waters. Actinomycetota is one of the dominant bacterial phyla and contains one of the largest of bacterial genera, Streptomyces. Streptomyces and other actinomycetota are major contributors to biological buffering of soils. They are also the source of many antibiotics. The Actinomycetota genus Bifidobacterium is the most common bacteria in the microbiome of human infants. Although adults have fewer bifidobacteria, intestinal bifidobacteria help maintain the mucosal barrier and reduce lipopolysaccharide in the intestine.Although some of the largest and most complex bacterial cells belong to the Actinomycetota, the group of marine Actinomarinales has been described as possessing the smallest free-living prokaryotic cells.Some Siberian or Antarctic Actinomycetota is said to be the oldest living organism on Earth, frozen in permafrost at around half a million years ago. The symptoms of life were detected by CO2 release from permafrost samples 640 kya or younger.

WikidataRate this definition:1.0 / 1 vote

1. Actinobacteria

   Actinobacteria are a group of Gram-positive bacteria. They were all believed to have high guanine and cytosine content in their DNA. However, recently it has been shown that several freshwater Actinobacteria actually have low G+C content. The G+C content of freshwater Actinobacteria can be as low as 42%. In view of this, continued use of the epithet high G+C Gram positive organisms to refer to Actinobacteria must now be discontinued. They can be terrestrial or aquatic. Although understood primarily as soil bacteria, they might be more abundant in freshwaters. Actinobacteria is one of the dominant bacterial phyla and contains one of the largest of bacterial genera, Streptomyces. Analysis of glutamine synthetase sequence has been suggested for phylogenetic analysis of Actinobacteria.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Actinobacteria

   Class of BACTERIA with diverse morphological properties. Strains of Actinobacteria show greater than 80% 16S rDNA/rRNA sequence similarity among each other and also the presence of certain signature nucleotides. (Stackebrandt E. et al, Int. J. Syst. Bacteriol. (1997) 47:479-491)

How to pronounce actinobacteria?

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Numerology

1. Chaldean Numerology

   The numerical value of actinobacteria in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of actinobacteria in Pythagorean Numerology is: 4

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References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Actinobacteria
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Actinobacteria
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=actinobacteria