162 



ORDER I. PSEUDOMONADALES 



citric, acetic or formic acids. No growth 

 when asparagine is used as carbon-nitrogen 

 source. 



Starch hydrolyzed. 



Temperature relations: Optimum, be- 

 tween 25° and 30° C. Slight growth at 11° C. 

 No growth at 38° C. 



Chemical tolerance: Optimum pH, be- 

 tween 6.8 and 7.3. No growth at pH 8.5; 

 slight growth at pH 3.2. 



Aerobic. 



Source: From diseased Desmodium dif- 

 fusum in India. 



Habitat: Pathogenic on Desmodium dif- 

 fusum, not on D. gangeticum. 



17. Xanthonionas desmodiigangeticii 



Uppal et al., 1948. {Xanthomonas desmodii- 

 gangeticii (sic) Uppal, Patel and Moniz, in 

 Patel and Moniz, Indian Phytopath., 1, 

 1948, 140; also see Patel and Moniz, Curr. 

 Sci., 17, 1948, 268.) 



des.mo'di.i.gan.ge'ti.ci.i. M.L. neut.n. 

 Desmodium gangeticum name of host species; 

 M.L. gen. noun desmodiigangeticii of Des- 

 )iiodium gangeticum. 



Rods 0.7 to 1.4 by 1.5 to 2.5 microns. 

 Motile with a single flagellum. Gram-nega- 

 tive. 



Gelatin: Liquefied. 



Nutrient agar slants: Growth fair, dull, 

 flat, opalescent, lemon-chrome. 



Nutrient broth: Moderately turbid. No 

 pellicle. 



Milk: Litmus reduced. No tyrosine. 



Nitrites not produced from nitrates. 



Hydrogen sulfide produced. 



Indole not produced. 



Non-lipolytic. 



Uschinsky's solution: Growth. 



Acetylmethjdcarbinol not produced. 



Arabinose, xylose, glucose, galactose, 

 fructose, maltose, sucrose, raffinose, manni- 

 tol, salicin and sodium citrate are utilized. 

 Asparagine utilized as carbon-nitrogen 

 source. 



Starch hydrolyzed. 



Salt tolerance: Growth retarded by 3 per 

 cent salt; inhibited by 4 per cent salt. 



Temperature relations: Optimum, be- 

 tween 20° and 25° C. Minimum, 5°C. Maxi- 

 mum, 35° C. 



Aerobic. 



Source: From a disease of Desmodium 

 gangeticum found in India. 



Habitat: Pathogenic on Desmodium gange- 

 ticum but not on D. diffusum. 



18. Xanthomonas diefFenbachiae (Mc- 

 Culloch and Pirone, 1939) Dowson, 1943. 

 {Phytomonas dieffenbachiae McCulloch and 

 Pirone, Phytopath., 29, 1939, 962; Dowson, 

 Trans. Brit. Mycol. Soc, 26, 1943, 12.) 



dief .fen.bach'i.ae. Dieffenbach patro- 

 nymic; M.L. fem.n. Dieffenbachia generic 

 name; M.L. gen. noun dieffenbachiae oi Dief- 

 fenbachia. 



Rods 0.3 to 0.4 by 1.0 to 1.5 microns. 

 Encapsulated. Motile with a single polar 

 flagellum. Gram-negative. 



Gelatin: Liquefied. 



Beef -infusion peptone agar colonies: 

 Slow growing, circular, flat, smooth, trans- 

 lucent, butyrous, massicot- to Naples- 

 yellow. 



Broth: Turbid. Yellow rim or slight 

 pellicle. 



Milk: Slow peptonization and formation 

 of tyrosine crystals. Litmus reduced. 



Nitrites not produced from nitrates. 



Indole not produced. 



Hydrogen sulfide produced. 



Acid from glucose, sucrose, lactose, 

 galactose, fructose and glycerol. Growth 

 but no acid in maltose and mannitol. 



Starch moderately hydrolyzed. 



Temperature relations: Optimum, be- 

 tween 30° and 31° C. Minimum, 5° C. Maxi- 

 mum, between 37° and 38° C. 



Aerobic. 



Source: Seven isolates from diseased 

 leaves of Dieffenbachia picta. 



Habitat: Pathogenic on Dieffenbachia 

 picta. Artificial infection of Dracaena fra- 

 grans. 



19. Xanthomonas hemmiana (Yama- 

 moto, 1951) Burkholder, comb. nov. (Phyto- 

 monas hemmianus (sic) Yamamoto, Forsch. 

 auf dem Gebiet d. Pflanzenkr., 4, 1951, 163.) 



hem.mi.a'na. Named for T. Hemmi, a 

 Japanese plant pathologist; M.L. adj. 

 hemmianus of Hemmi. 



Rods, 0.3 to 0.7 by 1.3 to 2.2 microns, 

 occurring singly or in pairs. Motile with 1 to 

 3 polar flagella. Gram-negative. 



