Genus Buchnera
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Enterobacterales, Family Erwiniaceae, Genus Buchnera, Buchnera
aphidicola
Munson et al. 1991, single species of the genus.
Gram-negative, round or slightly oval cells, 2-5 µm in diameter. Non-motile (lack
flagella). Cells divide by binary fission.
Endospores are not formed.
Cannot be cultivated outside the host.
Has been found in various species of aphids: Schizaphis graminum, Rhopalosiphum maides, Rhopalosiphum padi, Myzus persicae,
Uroleucon sonchi, Acyrthosiphon pisum, Diuraphis noxia, Chaitophorus viminalis, Mindarus victoria, Pemphigus betae, and Melaphis
rhois.

Generally susceptible to penicillin, streptomycin, chloramphenicol, neomycin, and tetracycline.
Endosymbiont. Found  in the mycetocytes of aphids in vesicles derived from the host membranes. Essential for the survival of the
aphid.
All aphids have specialized organs, the mycetomes,  which consist of cells (mycetocytes) containing the endosymbionts.
  1. Munson MA, Baumann P, Kinsey MG. Buchnera gen. nov. and Buchnera aphidicola sp. nov., a taxon consisting of the mycetocyte-
    associated, primary endosymbionts of aphids. Int. J. Syst. Bacteriol. 1991; 41:566-568.
Undetermined.
(c) Costin Stoica
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