good filiform growth, glistening, primuline-yellow. Develops in 24 hours.
Broth: Turbid in 24 hours. No pellicle but a moderate sediment.
Milk: Becomes clear with a heavy casein precipitate. Peptonization with crystal formation.
Nitrates reduced to ammonia.
Indole not produced.
Hydrogen sulfide produced.
Lipolytic (Starr and Burkholder, Phytopath., 32, 1942, 600).
Acid from glucose, galactose, fructose, xylose, rhamnose, lactose, sucrose, raffinose and glycerol. Alkaline reaction from salts of citric, malic, malonic and succinic acids. No growth in arabinose or formic, hippuric, maleic or tartaric acids.
Starch not hydrolyzed.
Pectate medium liquefied.
Aerobic.
Distinctive characters: Pathogenic on Geranium spp., not on the house geranium, Pelargonium hortorum.
Relationship to other species: Similar in culture to Xanthomonas pelargonii.
Source: Three cultures isolated from Geranium sanguineum.
Habitat: Pathogenic on Geranium sanguineum, G. maculatum, G. pratense and G. sylvaticum.
46. Xanthomonas antirrhini (Takimoto, 1920) Dowson, 1943. (Pseudomonas antirrhini Takimoto, Bot. Mag. Tokyo, 34, 1920, 257; Dowson, Trans. Brit. Mycol. Soc, 26, 1943, 11.)
an.tir.rhi'ni. Gr. antirrhinum the plant snapdragon; M.L. gen.noun antirrhini of the snapdragon.
Description from Elliott (Man. Bact. Plant Path., 1930, 93).
Rods 0.3 to 0.4 by 0.8 to 1.2 microns. Encapsulated. Motile with polar flagella. Gram-negative.
Gelatin: Liquefied.
Agar colonies: Circular, glistening, white, later yellow.
Milk: Coagulated and casein digested.
Nitrites produced from nitrates.
No gas produced.
Aerobic.
Temperature relations: Optimum, between 26° and 27° C. Maximum, 34° C.
Habitat: Causes a leaf spot of Antirrhinum majus.
47. Xanthomonas heterocea (Vzoroff, 1930) Săvulescu, 1947. (Phytomonas heterocea Vzoroff, Bull. North Caucasian Plant Prot. Sta. Roztoff-on-Don, 6–7, 1930, 263; Săvulescu, Anal. Acad. Romane, III, 22, 1947, 11.)
he.te.ro'ce.a. Gr. adj. heterus another, different.
Description taken from Rev. App. Myc., 10, 1931, 628.
Rods 0.4 to 0.6 by 1.0 to 2.0 microns. Motile. Gram-negative.
Gelatin: Slow liquefaction.
Agar colonies: Circular, 2 mm in diameter, convex, smooth, semi-transparent, glistening, yellow to amber. Pitted surface.
Milk: No coagulation. At first acid, later alkaline.
Nitrites produced from nitrates.
Indole not produced.
Hydrogen sulfide produced.
Acid from glucose, galactose, arabinose, xylose, sucrose, maltose, salicin, glycerol and mannitol. Does not ferment lactose, inulin, ethyl alcohol, esculin, adonitol or dulcitol.
Optimum temperature, between 25° and 30° C.
Source: Isolated from diseased tobacco in the North Caucasus.
Habitat: Pathogenic on Nicotiana tabacum.
48. Xanthomonas badrii Patel et al., 1950. (Patel, Kulkarni and Dhande, Indian Phytopath., 3, 1950, 104.)
bad'ri.i. From the given name of Badri Uppal, Indian plant pathologist; M.L. gen. noun badrii of Badri.
Rods, 0.7 to 1.0 by 1.4 to 1.8 microns, occurring singly and rarely in chains. Motile with a single polar flagellum. Gram-negative.
Gelatin: Liquefied.
Nutrient agar colonies: Smooth, glistening, entire, empire-yellow; growth slow.
Milk: Cleared in 8 days. Litmus reduced.
Loeffler's blood serum: Liquefied.
