Pseudonocardia oroxyli

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Pseudonocardia oroxyli
Scientific classification
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P. oroxyli
Binomial name
Pseudonocardia oroxyli
Gu, 2006

Pseudonocardia oroxyli is a soil-dwelling actinomycete that was isolated from the roots of the South-East Asia tree Oroxylum indicum . [1]

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Pseudonocardia is the type genus of the bacteria family Pseudonocardiaceae. Members of this genus have been found living mutualistically on the cuticle of the leafcutter ants because the bacteria has antibiotic properties that protect the fungus grown by the ants. When they are grooming, their legs are passed over their mouth gland that produces the antibiotic and then their legs touch the fungi while they are walking around. The ants have metapleural glands that produce the antimicrobial components to eliminate the Escovopsis fungi. The bacteria may also be found in crypts on the propleural plate. Pseudonocardia is found to have antibiotic properties provided to the leaf-cutter ant to inhibit the growth of Escovopsis, which is a black yeast that parasitizes the leaf-cutter ant. Pseudonocardia can be found in both aquatic and terrestrial ecosystems. Pseudonocardia belongs to the phylum Actinobacteria. Most Actinobacteria grow in soils that are of a neutral pH. Actinobacteria are also important in plant-associated microbial communities are referred to as "free-living." This means that they are not dependent on another organism to live. For example: A non-free-living organism would be a parasite that depends on a host as a food source and a place for shelter. "Free-living" also allows these organisms to require less energy and food for survival. Pseudonocardia is a catalase-positive, non-motile, aerobic and a non-acid-fasting bacteria and produces a gram positive reaction. Under the microscope they exhibit branching, rod-shaped organisms.
There are many different strains of Pseudonocardia and a good portion of these strains have been found in China, in soils of the forest and in Eucalyptus trees of Australia.

Pseudonocardia asaccharolytica is a dimethyl disulfide-degrading actinomycete, with type strain DSM 44247T.

Pseudonocardia sulfidoxydans is a dimethyl disulfide-degrading actinomycete, with type strain DSM 44248T.

Pseudonocardia antarctica is a bacterium from the genus of Pseudonocardia which has been isolated from soil from the McMurdo Dry Valleys from the Antarctica.

Pseudonocardia antitumoralis is a bacterium from the genus of Pseudonocardia which has been isolated from deep-sea sediments from the South China Sea. Pseudonocardia antitumoralis produces deoxynyboquinone, pseudonocardian A, pseudonocardian B, and pseudonocardian C.

Pseudonocardia carboxydivorans is a bacterium from the genus of Pseudonocardia which has been isolated from soil in Seoul in Korea. Pseudonocardia carboxydivorans has the ability to oxidize carbon monoxide.

Pseudonocardia chloroethenivorans is a trichloroethene degrading bacterium from the genus of Pseudonocardia.

Pseudonocardia dioxanivorans is a Gram-positive bacterium from the genus of Pseudonocardia which has been isolated from industrial sludge which was contaminated with 1,4-dioxane in the United States.

Pseudonocardia hispaniensis is a bacterium from the genus of Pseudonocardia which has been isolated from a wastewater treatment plant in Palos de la Frontera in Spain.

Pseudonocardia nantongensis is a bacterium from the genus of Pseudonocardia which ash been isolated from the leaves of the plant Tamarix chinensis from Nantong in China.

Pseudonocardia rhizophila is a bacterium from the genus of Pseudonocardia which has been isolated from rhizosphere soil from the plant Tripterygium wilfordii in Yunnan in China.

Pseudonocardia sichuanensis is a bacterium from the genus of Pseudonocardia which has been isolated from the roots of the plant Jatropha curcas in Panzhihua in China.

Pseudonocardia tropica is a bacterium from the genus of Pseudonocardia which has been isolated from the stem of the tree Maytenus austroyunnanensis in Xishuangbanna in China.

Pseudonocardia xishanensis is a Gram-positive and non-motile bacterium from the genus of Pseudonocardia which has been isolated from the roots of the plant Artemisia annua from the Xishan Mountains in China.

References

  1. Pseudonocardia oroxyli sp. nov., a novel actinomycete isolated from surface-sterilized Oroxylum indicum root. Gu, Q., Luo, H., Zheng, W., Liu, Z., and Huang, Y., Int. J. Syst. Evol. Microbiol. (2006), vol. 56, pp. 2193-2197 doi : 10.1099/ijs.0.64385-0