Kosakonia
| Kosakonia | |
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| Genus: | Kosakonia Brady et al. 2013
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| Type species | |
| Kosakonia cowanii | |
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Kosakonia is a genus of Gram-negative bacteria in the family Enterobacteriaceae. Members of this genus are rod-shaped, motile, and typically associated with plants. They are often isolated as endophytes or rhizosphere bacteria and have shown potential for plant growth promotion and nitrogen fixation.[1]
Taxonomy and etymology
[edit]Kosakonia was established in 2013 as part of a reclassification of species formerly placed in the genus Enterobacter. The genus is named in honor of microbiologist Yoshimasa Kosako. Phylogenetic analyses based on multilocus sequence analysis (MLSA) led to the creation of this distinct genus within the Gammaproteobacteria.[1]
Description
[edit]Members of Kosakonia are facultative anaerobic, rod-shaped organisms. They are motile by means of peritrichous flagella and typically produce smooth, convex colonies on nutrient-rich agar. Kosakonia species are oxidase-negative and catalase-positive, and ferment a variety of sugars.[1]
Ecology and significance
[edit]Kosakonia species are frequently found in association with agricultural crops, including rice and maize. They can live as endophytes within plant tissues or as rhizobacteria in the surrounding soil. Their ecological roles may include biocontrol,[plant growth promotion, and nutrient cycling. Some strains have been shown to fix atmospheric nitrogen and produce phytohormones such as indole-3-acetic acid (IAA), contributing to improved plant health and yield.[1]
Species
[edit]Recognized species within the genus Kosakonia include:
- Kosakonia arachidis
- Kosakonia cowanii
- Kosakonia oryzae
- Kosakonia radicincitans
- Kosakonia sacchari
- Kosakonia pseudosacchari
- Kosakonia quasisacchari
References
[edit]- ^ a b c d Brady, Carrie; Cleenwerck, Ilse; Venter, Stephanus; Coutinho, Teresa; De Vos, Paul (2013). "Taxonomic evaluation of the genus Enterobacter based on multilocus sequence analysis (MLSA): proposal to reclassify E. nimipressuralis and E. amnigenus into Lelliottia gen. nov. as Lelliottia nimipressuralis comb. nov. and Lelliottia amnigena comb. nov., respectively, E. gergoviae and E. pyrinus into Pluralibacter gen. nov. as Pluralibacter gergoviae comb. nov. and Pluralibacter pyrinus comb. nov., respectively, E. cowanii, E. radicincitans, E. oryzae and E. arachidis into Kosakonia gen. nov. as Kosakonia cowanii comb. nov., Kosakonia radicincitans comb. nov., Kosakonia oryzae comb. nov. and Kosakonia arachidis comb. nov., respectively, and E. turicensis, E. helveticus and E. pulveris into Cronobacter as Cronobacter zurichensis nom. nov., Cronobacter helveticus comb. nov. and Cronobacter pulveris comb. nov., respectively, and emended description of the genera Enterobacter and Cronobacter". Systematic and Applied Microbiology. 36 (5): 309–319. Bibcode:2013SyApM..36..309B. doi:10.1016/j.syapm.2013.03.005. PMID 23623229.