Milk: Turns alkaline and clears, litmus reduced.
Nitrites not produced from nitrates.
Indole produced in 14 days.
Hydrogen sulfide not produced.
Acid but no gas from glucose, sucrose, lactose and glycerol.
Temperature: No growth at 35° C.
Aerobic, obligate.
Source: Isolated from Erodium texanum and 4 varieties of Pelargonium.
Habitat: Causes a leaf spot of Erodium texanum and Pelargonium spp.
83. Pseudomonas lapsa (Ark, 1940) Starr and Burkholder, 1942. (Phytomonas lapsa Ark, Phytopath., 30, 1940, 1; Starr and Burkholder, Phytopath., 32, 1942, 601.)
lap'sa. L. v. labor to fall down, slip; L. part.adj. lapsus fallen down.
Rods 0.56 by 1.55 microns. Motile, with 1 to 4 polar flagella. Gram reaction not reported; presumably Gram-negative.
Produces fluorescence in Uschinsky's, Fermi's and Cohn's solutions.
Gelatin: Liquefied (Burkholder).
Nitrites produced from nitrates (Burkholder and Starr, Phytopath., 38, 1948, 498).
Acid but no gas from glucose, sucrose, maltose, lactose, glycerol, arabinose, xylose, galactose, raffinose and mannitol.
Slight growth in broth plus 5 per cent salt (Burkholder).
Relationship to other species: Resembles Pseudomonas desaiana.
Source: Isolated from stalk rot of field corn in California; also from Diabrotica beetles.
Habitat: Pathogenic on corn and sugar cane.
84. Pseudomonas martyniae (Elliott, 1924) Stapp, 1928. (Bacterium martyniae Elliott, Jour. Agr. Res., 29, 1924, 490; Stapp, in Sorauer, Handbuch der Pflanzenkrankheiten, 2, 5 Aufl., 1928,278.)
mar.tyn'i.ae. M.L. Martynia genus of flowering plants; M.L. gen.fem. martyniae of Martynia.
Rods, 0.59 to 1.68 microns, occurring in chains. Encapsulated. Motile with one to several bipolar flagella. Gram-negative.
Green fluorescent pigment produced.
Gelatin: Liquefied.
Beef agar colonies: White, round, smooth, glistening, raised.
Broth: Clouding in bands. Thin pellicle. Small crystals.
Milk: Soft acid curd with peptonization.
Nitrites produced from nitrates after 2 weeks.
Indole not produced.
Hydrogen sulfide production slight.
Acid but no gas from glucose, galactose, arabinose and sucrose. No acid from rhamnose, lactose, maltose, raffinose, mannitol or glycerol.
Starch hydrolysis none or feeble.
Temperature relations: Optimum, 26° C. Minimum, 1.5° C. Maximum, 37° C.
Chemical tolerance: Optimum pH, 6.0 to 6.7. pH range, 5.4 to 8.9.
Aerobic.
Source: Isolated from diseased leaves of the unicorn plant from Kansas.
Habitat: Pathogenic on Martynia louisiana.
85. Pseudomonas matthiolae (Briosi and Pavarino, 1912) Dowson, 1943. (Bacterium matthiolae Briosi and Pavarino, Atti della Reale Accad. dei Lincei Rend., 21, 1912, 216; Dowson, Trans. Brit. Mycol. Soc, 26, 1943, 10.)
mat.thi'o.lae. Mattioli patronymic; M.L. fem.noun Matthiola generic name of stock; M.L. fem.gen.noun matthiolae of Matthiola.
Rods 0.4 to 0.6 by 2.0 to 4.0 microns. Gram-positive. Gram-negative (Mushin, Proc. Roy. Soc. Victoria, 53, 1941, 201).
Green fluorescent pigment produced in culture.
Gelatin: Liquefied.
Beef agar colonies: White, circular, slightly elevated, margins smooth.
Broth: Slightly turbid. Becomes pale green.
Milk: Coagulation with acid reaction.
Nitrites produced from nitrates (Mushin, Proc. Trans. Brit. Mycol. Soc, 26, 1943, 10).
Hydrogen sulfide not produced.
Acid from glucose, galactose, fructose, mannose, rhamnose, glycerol, mannitol, acetic acid, citric acid, formic acid, lactic acid, malic acid and succinic acid. Feeble acid from maltose. No acid or gas from lac-
