citric, acetic or formic acids. No growth when asparagine is used as carbon-nitrogen source.
Starch hydrolyzed.
Temperature relations: Optimum, between 25° and 30° C. Slight growth at 11° C. No growth at 38° C.
Chemical tolerance: Optimum pH, between 6.8 and 7.3. No growth at pH 8.5; slight growth at pH 3.2.
Aerobic.
Source: From diseased Desmodium diffusum in India.
Habitat: Pathogenic on Desmodium diffusum, not on D. gangeticum.
17. Xanthomonas desmodiigangeticii Uppal et al., 1948. (Xanthomonas desmodiigangeticii (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 Desmodium gangeticum.
Rods 0.7 to 1.4 by 1.5 to 2.5 microns. Motile with a single flagellum. Gram-negative.
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.
Acetylmethylcarbinol not produced.
Arabinose, xylose, glucose, galactose, fructose, maltose, sucrose, raffinose, mannitol, 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, between 20° and 25° C. Minimum, 5°C. Maximum, 35° C.
Aerobic.
Source: From a disease of Desmodium gangeticum found in India.
Habitat: Pathogenic on Desmodium gangeticum but not on D. diffusum.
18. Xanthomonas dieffenbachiae (McCulloch 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 patronymic; M.L. fem.n. Dieffenbachia generic name; M.L. gen.noun dieffenbachiae of Dieffenbachia.
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, translucent, 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, between 30° and 31° C. Minimum, 5° C. Maximum, between 37° and 38° C.
Aerobic.
Source: Seven isolates from diseased leaves of Dieffenbachia picta.
Habitat: Pathogenic on Dieffenbachia picta. Artificial infection of Dracaena fragrans.
19. Xanthomonas hemmiana (Yamamoto, 1951) Burkholder, comb. nov. (Phytomonas 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.
