FAMILY IV. PSEUDOMONADACEAE 



175 



Hydrogen sulfide not produced. 



Non-Iipolytic. 



Tyrosine in a caseinate medium: Growtli 

 slight; no color reaction. 



Carbohj'drate utilization difficult to 

 determine because of meager growth. Glu- 

 cose, sucrose and trehalose probably uti- 

 lized. Lactose, maltose, raffinose, dulcitol, 

 gl,ycerol, mannitol, sorbitol, dextrin, inulin, 

 aesculin and salicin utilization doubtful. 



Starch hydrolyzed. 



Pectate medium not liquefied. 



Temperature relations: Optimum, 30° C. 

 Minimum, 5° C. Maximum, 37° C. 



Moderate growth in broth plus 1 per cent 

 NaCl; no growth with 1.5 per cent NaCl. 



Chemical tolerance: Optimum pH be- 

 tween 6.6 and 7.6. Minimum, 5.8. 



Source: Isolated from diseased grass, 

 Axonopus scoparius, in Colombia. 



Habitat: Pathogenic on Axonopvs spp. 



52. Xanthonionas oryzae (Uyeda and 

 Ishiyama, 1926) Dowson, 1943. (Pseudo- 

 monas oryzae Uyeda and Ishiyama, Proc. 

 Third Pan-Pacific Sci. Congr., Tokyo, 2, 

 1926, 2112; Dowson, Trans. Brit. Mycol. 

 Soc, 26, 1943, 12.) 



o.ry'zae. Gr. oryza rice; M.L. fem.n. 

 Oryza generic name of rice; M.L. gen. noun 

 oryzae of Oryza. 



Rods 0.5 to 0.8 by 1.0 to 2.0 microns. 

 Motile with a single polar flagellum. Gram- 

 negative. 



Gelatin: No liquefaction. 



Nutrient agar colonies: Circular, smooth, 

 glistening, wax-j-ellow. 



Milk: Slightly acid. 



Nitrites not produced from nitrates. 



Hydrogen sulfide produced. 



Acid but no gas from glucose, lactose and 

 sucrose. 



Optimum temperature, between 26° and 

 30° C. 



Strict aerobe. 



Source: Isolated from a leaf blight of rice. 



Habitat: Pathogenic on rice, Oryza saliva. 



53. Xanthonionas celebensis (Giiu- 

 mann, 1923) Dowson, 1943. {Fseiidomonas 

 celebensis Gaumann, Ztschr. f. Pflanzen- 

 krank., SS, 1923, 11; Meded. Inst, voor 

 Plantenziek., Buitenzorg, 59, 1923, 17; 



Dowson, Trans. Brit. Mycol. Soc, 26, 1943, 

 11.) 



ce.le.ben'sis. Celebes, an island name; 

 M.L. adj. celebensis of Celebes. 



Rods 0.9 by 1.5 microns. Motile by a 

 single polar flagellum. Gram-negative. 



Agar colonies: Graj'ish yellow. 



Broth: Thin pellicle. 



Milk: Coagulated and cleared. 



Nitrites not produced from nitrates. 



Sodium selenite: Brick red. 



Starch hydrolyzed. 



Source: From vascular bundles of dis- 

 eased bananas from the Celebes. 



Habitat: Causes the blood disease of 

 banana. 



54. Xanthonionas panici (Elliott, 1923) 

 Savulescu, 1947. (Bacterium panici Elliott, 

 Jour. Agr. Res., 26, 1923, 157; Sivulescu, 

 Anal. Acad. Romane, III, 22, 1947, 11.) 



pa'ni.ci. L. panicum Italian panic grass; 

 M.L. neut.n. Panicum generic name; M.L. 

 gen. noun panici of Panicum. 



Rods 0.69 by 1.66 microns. Encapsu- 

 lated. Motile with 1, rarely 2, polar flagella. 

 Gram-negative. 



Gelatin: Liquefaction slow. 



Beef agar colonies: Circular, white, 

 smooth, glistening, margins at first entire, 

 later undulate. 



Broth: Moderate turbidity in 24 hours. 

 Thin pellicle. Medium brownish. 



Milk: Alkaline and clears. 



Nitrites produced from nitrates. 



Indole not produced. 



Hydrogen sulfide produced. 



No acid or gas from carbohydrates. 



Starch: Hydrolysis moderate. 



Temperature relations: Optimum, 33° C. 

 Minimum, 5° C. Maximum, 45° C. 



pH range for growth, pH 5.4 to 10.0. 

 Optimum pH, between 6.15 and 6.3. 



Aerobic. 



Distinctive characters: Differs from 

 Pseudomonas andropogoni in that it liquefies 

 gelatin, produces nitrites from nitrates and 

 does not infect sorghum and broom corn. 



Source: Isolation from water-soaked le- 

 sions on leaves, sheaths and culms of millet 

 collected in Wisconsin and in S. Dakota. 



Habitat: Pathogenic on i)roso millet, 

 Panicum miliaceum. 



