{{Short description|Genus of bacteria}} {{Automatic_taxobox | taxon = Kosakonia | authority = Brady et al. 2013 | type_species = ''Kosakonia cowanii'' | subdivision_ranks = Species | subdivision = * ''Kosakonia arachidis'' * ''Kosakonia cowanii'' * ''Kosakonia oryzae'' * ''Kosakonia radicincitans'' * ''Kosakonia sacchari'' * ''Kosakonia pseudosacchari'' * ''Kosakonia quasisacchari'' }}
'''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.<ref name="Brady2013" />
== Taxonomy and etymology == ''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.<ref name="Brady2013" />
== Description == 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.<ref name="Brady2013" />
== Ecology and significance == ''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.<ref name="Brady2013" />
== Species == Recognized species within the genus ''Kosakonia'' include: * ''Kosakonia arachidis'' * ''Kosakonia cowanii'' * ''Kosakonia oryzae'' * ''Kosakonia radicincitans'' * ''Kosakonia sacchari'' * ''Kosakonia pseudosacchari'' * ''Kosakonia quasisacchari''
==References== <references> <ref name="Brady2013">{{cite journal | last1 = Brady | first1 = Carrie | last2 = Cleenwerck | first2 = Ilse | last3 = Venter | first3 = Stephanus | last4 = Coutinho | first4 = Teresa | last5 = De Vos | first5 = Paul | title = 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'' | journal = Systematic and Applied Microbiology | volume = 36 | issue = 5 | pages = 309–319 | year = 2013 | doi = 10.1016/j.syapm.2013.03.005 | pmid = 23623229 | bibcode = 2013SyApM..36..309B }}</ref> </references>
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Category:Enterobacteriaceae Category:Bacteria genera Category:Gram-negative bacteria