FAMILY PSEUDOMONADACEAE 



161 



20a. Xanthomonasphaseoli var. sojensis 

 (Hedges) Starr and Burkholder. {Bac 

 terium phaseoli var. sojense Hedges 

 Science, 56, 1922, 11; Jour. Agr. Res. 

 ^9, 1924, 229; Phytomonas phaseoli var 

 sojense Burkholder, Phytopath., 20 

 1930, 7; Starr and Burkholder, Phyto- 

 path., 32, 1942, 600.) From M. L. the 

 soy bean, Soja, a generic name; M. L. 

 sojensis, of the soybean. 



Synonyms : Pseudomonas glycines Na- 

 kano. Jour. Plant Protect. Tokyo, 6, 1919, 

 39 {Bacterium glycines Elliott, Manual 

 Bact. Plant Path., 1928, 133; Phytomonas 

 glycines IVIagrou, in Hauduroy et al., 

 Diet. d. Bact. Path., 1937, 358). (See 

 Takimoto, Jour. Plant Protect. Tokyo, 

 18, 1931, 29; and Okabe, Jour. Trop. 

 Agr. Formosa, 4, 1932, 473.) 



Distinctive character: Differs from 

 Xanthomonas phaseoli in that it infects 

 the soy bean, Glycine max. 



Source : Isolated from pustules on the 

 leaves and pods of soy bean, both in 

 America and in Japan. 



Habitat : Pathogenic on the soy bean. 

 Glycine max and the common bean, 

 Phaseolus vulgaris. 



20b. Xanthomonas phaseoli var. fus- 

 cans (Burkholder) Starr and Burkholder. 

 {Phytomonas phaseoli vslt. fuscans Burk- 

 holder, Cornell Agr. Exp. Sta. Mem. 126, 

 1930, 22; Phytopath., 22, 1932, 699; 

 Bacterium phaseoli var. fuscans Okabe, 

 Jour. Soc. Trop. Agr. Formosa, 5, 1933, 

 161 ; Pseudomonas phaseoli var. fuscans 

 Stapp, Bot. Rev., 1, 1935, 407; Starr and 

 Burkholder, Phytopath., 32, 1942, 600.) 

 From L. fuscans, producing a brown 

 color. 



Distinctive characters: Differs from 

 Xantlwmonas phaseoli in that it produces 

 a deep brown color in beef-extract-pep- 

 tone media and in tyrosine media. 

 Action on maltose negative or feeble. 



Source : Two cultures isolated ; one 

 from a diseased bean leaf (1924) and a 

 diseased pod (1927) collected in Switz- 

 erland. 



Habitat: Pathogenic on beans, Phase- 

 olus vulgaris, and related plants. 



21. Xanthomonas plantaginis (Thorn- 

 berry and Anderson) comb. nov. {Phy- 

 tomonas plantaginis Thornberry and 

 Anderson, Phytopath., 27, 1937, 947.) 

 From Latin, Plantago (-agrzms), plantain; 

 1\I. L. Plantago, a generic name. 



Rods: 0.6 to 1.0 by 1.0 to 1.8 microns. 

 Occurring singly or in chains. Capsules. 

 Motile with 1 to 2 polar flagella. Gram- 

 negative. 



Gelatin : Slight liquefaction. 



Glucose agar slant : Growth moderate, 

 filiform, raised, opaque, yellow and 

 A-iscid. 



Broth: Moderately turbid with ring. 



Milk: Slight acidity, nt) reduction of 

 litmus. Peptonization. 



Nitrites not produced from nitrates. 



Indole not formed. 



Hydrogen sulfide not produced. 



No appreciable amount of gas from 

 carbohydrates. 



Starch is hydrolyzed. 



Optimum temperature 25°C. Mini- 

 mum 12°C. Maximum 35°C. Thermal 

 death point 50°C. 



Aerobic. 



Source : From diseased leaves of Plan- 

 tago lanceolata in Illinois. 



Habitat: Pathogenic on Plantago spp. 



22. Xanthomonas ricinicola (Elliott) 

 Dowson. {Bacterium ricini Yoshi and 

 Takimoto, Jour. Plant Protect. Tokyo, 

 15, 1928, 12; Bacterium ricinicola Elliott, 

 Man. Bact. Plant Path., 1930, 193; Phijto- 

 monas ricinicola Burkholder, in Manual, 

 5th ed., 1939, 152; Dowson, Cent. f. 

 Bakt., II Abt., 100, 1939, 190; Xantho- 

 monas ricini Dowson, ibid.) From L. 

 living on the castor bean ; M. L. Ricinus, 

 a generic name. 



Rods: 0.4 to 0.9 by 1.3 to 2.6 microns. 

 Capsules. Short chains. Motile with 

 polar flagella. Gram-negative. 



Gelatin : Liquefaction. 



Nutrient agar colonies : Lemon yellow, 

 changing to brown. 



