FAMILY PSEUDOMOXADACEAE 



171 



Habitat : Pathogenic on sugar cane, 

 Johnson's grass and sorghum. 



45. Xanthomonas cannae (Bryan) 

 comb. nov. {Bacterium cannae Bryan, 

 Jour. Agr. Res.,^i, 1921, \b2;Phytomonas 

 cannae Bergey et al., Manual, 1st ed., 

 1923, 188; Pseudomonas cannae Stapp, in 

 Sorauer, Handb. d. Pflanzenkrank., 2, 

 5 Aufl., 1928, 65.) From Gr. canna, a 

 reed; M. L. Canna, a generic name. 



Rods: 0.5 to 0.7 by 1.0 to 2.0 microns. 

 Motile with 1 to 3 polar flagella. Cap- 

 sules. Gram -negative. 



Gelatin: Slow liquefaction. 



Agar streaks: Filiform, white, moist, 

 with thin margins and granular centers. 



Broth: Turbid, heavy sediment. 



Milk: Alkaline and clears. 



Nitrites are produced from nitrates. 



Indole not produced. 



Hydrogen sulfide produced. 



Optimum temperature 35°C. Maxi- 

 mum 40°C. Minimum 5°C. 



Aerobic. 



Source : Isolated from diseased canna 

 leaves collected in Washington, D. C. 

 and in Illinois. 



Habitat : Causes disease in Canna 

 indica. 



46. Xanthomonas zingiberi (LVeda) 

 comb. nuv. (Uyeda, Cent. f. Bakt., II 

 Abt., 17, 1907, 383; Pseudomonas zingi- 

 beri Uyeda, Rept. Imp. Agr. Exp. Sta., 

 Japan, No. 35, 1908, 114; Bacterium 

 zingiberi Nakata, see Elliott, Man. Bact. 

 Plant Path., 1930, 266; Phytomonas zingi- 

 beri Magrou, in Hauduroy, et al., Diet. d. 

 Bact. Path., Paris, 1937, 437.) From L. 

 zingiberis, ginger; M. L. Zingiber, a 

 generic name. 



Description from Stapp, in Sorauer, 



Handb. d. Pflanzenkrank., 2, 5 Aufl., 

 1928, 65. 



Rods : 0.5 to 1.1 by 0.75 to 1.8 microns. 

 Non-motile at first, later a polar flagel- 

 lum. Gram-negative. 



Gelatin: Liquefaction. 



Agar colonies : White. 



Milk: Coagulation and peptonization of 

 the casein. 



Nitrites are produced from nitrates. 



Indole not formed. 



Hydrogen sulfide is formed. 



No gas from glucose. 



Optimum temperature 28°C. Maxi- 

 mum 40°C. Minimum 5°C. 



Source : Isolated from ginger plant 

 showing a rot at the base of the sprouts. 



Habitat: Pathogenic on ginger, Zingi- 

 ber officinale. 



47. Xanthomonas conjaci (Uyeda) 

 comb. nov. (Pseudomonas conjac Uyeda, 

 Bot. Mag. Tokyo, 24, 1910, 182; Bac- 

 terium conjac Elliott, Man. Bact. Plant 

 Path., 1930, 121; Phytomonas conjac 

 Magrou, in Hauduroy et al., Diet. d. 

 Bact. Path., Paris, 1937, 347.) From 

 M. L. conjac, the specific name of the 

 plant which this species attacks. 



Description from Elliott (loc.cit.). 



Rods: 0.75 to 1.0 by 1.5 microns. 

 Motile with 1 to 4 polar flagella. Gram- 

 positive. 



Gelatin colonies : Circular to irregular, 

 light yellow. 



Broth: Pellicle formed. 



Milk: Coagulation. 



Conjac: Liquefied. 



Nitrites produced from nitrates. 



Indole produced. 



Hydrogen sulfide produced. 



Gas from glucose. 



Favorable temperature 24°C. 



Habitat : Pathogenic on Amorphophal- 

 lus konjac. 



Appendix I:* The following organisms placed in the genus Psei^domottas apparently 

 belong in Xanthomonas. Some may even be plant pathogens although they were 



* Prepared by Prof. Robert S. Breed, New York State Experiment Station, Geneva, 

 New York, July, 1943. 



