ABIS Encyclopedia

Pantoea stewartii

Taxonomy

Morphology

Cultural characteristics

Biochemical characters

Ecology

Pathogenicity

References

Phylum Pseudomonadota (Proteobacteria), Class Gammaproteobacteria, Order Enterobacterales, Family Erwiniaceae, Genus
Pantoea, species:
- Pantoea stewartii subsp. stewartii (Smith 1898) Mergaert et al. 1993, basonym: Erwinia stewartii, Dye 1963;
- Pantoea stewartii subsp. indologenes Mergaert et al. 1993;

Gram-negative, nonsporing rods, 0.5-1.3 x 1.0-3.0 μm, motile by peritrichous flagella.

Colonies on nutrient agar are yellow, smooth, translucent, and more or less convex
with entire margins. Facultatively anaerobic, growth temperature 30-37 ºC. Weak
growth at 4 or 41 ºC. Subsp. indologenes can grow up to 44 ºC.

Pantoea (Erwinia) stewartii subsp. stewartii was isolated from maize (sweet corn). Pantoea stewartii subsp. indologenes was isolated
from foxtail millet (Setaria italica), pearl millet (Pennisetum americanum), pineaple (Ananas comosus) and cluster bean (Cyamopsis
tetragonolobus).

Pantoea stewartii subsp. stewartii causes ‘Stewart’s bacterial wilt and leaf blight disease in corn (insects vectors).
Pantoea stewartii subsp. indologenes causes leaf spot on foxtail millet (Setaria italica), pearl millet (Pennisetum americanum) and rot
of pineaple (Ananas comosus).

J. G. Holt et al., 1994. Facultatively Anaerobic Gram-Negative Rods. Subgroup 1. Family Enterobacteriaceae. In: Begey’s Manual of
Determinative Bacteriology, 9th-edition, Williams & Wilkins, pp 175-189.
Mergaert J.et al.: Transfer of Erwinia ananas (synonym Erwinia uredovora) and Erwinia stewartii to the genus Pantoea emend. as
Pantoea ananas (Serrano 1928) comb. nov. and Pantoea stewartii (Smith 1898) comb. nov., respectively, and description of
Pantoea stewartii subsp. indologenes subsp. nov. Int. J. Syst. Bacteriol., 1993, 43, 162-173.
Kageyama B., Nakae M., Yagi S. & Sonoyama T.: Pantoea punctata sp. nov., Pantoea citrea sp. nov., and Pantoea terrea sp. nov.
isolated from fruit and soil samples. Int. J. Syst. Bacteriol., 1992, 42, 203-210.
Don J. Brenner and J.J. Farmer III, 2001. Family I. Enterobacteriaceae. In: Bergey’s Manual of Systematic Bacteriology, Second
edition, Vol two, part B, George M. Garrity (Editor-in-Chief), pp 587-897.
Adeolu M, Alnajar S, Naushad S, S Gupta R. Genome-based phylogeny and taxonomy of the 'Enterobacteriales': proposal for
Enterobacterales ord. nov. divided into the families Enterobacteriaceae, Erwiniaceae fam. nov., Pectobacteriaceae fam. nov.,
Yersiniaceae fam. nov., Hafniaceae fam. nov., Morganellaceae fam. nov., and Budviciaceae fam. nov. Int J Syst Evol Microbiol
2016; 66:5575-5599.

Positive results for catalase, DN-ase, acid production from glucose, D-mannitol, L-arabinose, D-mannose, trehalose and D-xylose.

Negative results for oxidase, arginine dihydrolase, lysine decarboxylase, ornithine decarboxylase, urea hydrolysis, phenylalanine
deaminase, acid production from: dulcitol, alpha-methyl-D-glucoside and D-adonitol.