Cross Index	Derxia gummosa
SuperSet	Prokaryote, Eubacteria Gram-Negative Aerobic/ Microaerophilic Rods and Cocci
Compare	Acetobacter, Acidiphilium, Acidomonas methanolica, Acidothermus cellulolyticus, Acidovorax, Acinetobacter, Afipia, Agrobacterium, Agromonas oligotrophica, Alcaligenes, Alteromonas, Aminobacter, Aquaspirillum, Azomonas, Azorhizobium caulinodans, Azotobacter, Bacteroides, Beijerinckia, Bordetella, Bradyrhizobium japonicum, Brucella, Chromohalobacter marismortui, Chryseomonas luteola, Comamonas, Cupriavidus necator, Deleya, Derxia gummosa, Ensifer adherans, Erythrobacter longus, Flavobacterium, Flavomonas oryzihabitans, Francisella, Frateuria aurantica, Gluconobacter, Halomonas, Hydrogenophaga, Janthinobacterium lividum, Kingella, Lampropedia hyalina, Legionella, Marinobacter hydrocarbonoclasticus, Marinomonas, Mesophilobacter marinus, Methylobacillus glycogenes, Methylobacterium, Methylococcus, Methylomonas, Methylophaga, Methylophilus, Methylovorus glucosotrophus, Moraxella, Morococcus cerebrosus, Neisseriaceae, Neisseria, Oceanospirillum, Ochrobactrum anthropi, Oligella, Paracoccus, Phenylobacterium immobile, Phyllobacterium, Pseudomonas, Psychrobacter immobilis, Rhizobacter daucus, Rhizobium, Rhizomonas suberifaciens, Rochalimaea, Roseobacter, Rugomonas rubra, Serpens, Sinorhizobium, Sphingobacterium, Taylorella equigenitalis, Thermoleophilum, Thermomicrobium, Thermus, Variovorax paradoxus, Volcaniella eurhalina, Weeksella, Wolinella, Xanthobacter, Xanthomonas, Xyella fastidiosa, Xylophilus ampelinus, Zoogloea ramigera
Contrast	Archaea

 

Morphology

Derxia gummosa

CELLULAR

Staining	Gram-negative..
Morphology	Rod-shaped cells with rounded ends, 1.0-1.2 um x 3.0-6.0 um, occurring singly or in short chains. Cells are rather pleomorphic, depending on age and the medium. In aging culturescells often remain together forming long filaments of sometimes locally swollen or distorted cells. Some cells may assume enormous sizes (up to 30 um).
Motility	Motile by a short polar flagellum; motile cells are numerous in liquid glucose media containing combined nitrogen, but rare on nitrogen-deficient solid media
Specialized structures	Young cells have a homogeneous cytoplasm; older cells show typical large refractile bodies throughout the whole cell. Resting stages are not known.

Division

COLONIAL

Solid surface

Colonies on agar media are at first slimy and semitransparent, later massive and opaque, highly raised with a wrinkled surface. Older colonies develop a dark mahogany-brown colour

Liquid

Broth cultures turn into a gelatinous mass, but growth near the surface is more luxuriant and forms a thick tough pellicle.

 

Growth Parameters

Derxia gummosa

PHYSIOLOGICAL

Tropism	Can grow as a facultative hydrogen autotroph.
Oxygen	Aerobic, having a strictly respiratory type of metabolism with oxygen as the terminal electron acceptor. Molecular nitrogen is fixed under aerobic conditions and also under decreased oxygen pressures (microaerophilic conditions).
pH	Growth occurs between pH 5.5 and 9.0; no growth at pH 4.4.
Temperature	Optimum, 25-35`C; growth is slow at 15`C, feeble at 40`C; no growth at 50'C.
Requirements
Products	A wide range of sugars, alcohols and organic acids are oxidized mostly to CO2 and a small amount of acid, probably acetic, when growing in an alkaline medium
Enzymes	Catalase- negative
Unique features

ENVIRONMENTAL

Habitat	Found in tropical soils (Asia, Africa, South America).
Lifestyle
Pathogenicity

Distribution

 

Genome

Derxia gummosa

G+C Mol %

69.2-72.6

 

Reference

Derxia gummosa

First citation	Jensen,H.L., E.J. Petersen ,P.K. De and R. Bhattacharya (1960) A new nitrogen fixing bacterium: Derxia gummosia nov. gen. Nov. spec. Arch Mikrobiol. 36: 182-195
The Prokaryotes	p
Bergey's Systematatic	p 321 J-H. Becking
Bergey's Determinative	p 81

References