158 



ORDER I. PSEUDOMONADALES 



Source: Isolated from red stripe lesions in 

 sugar cane. 



Habitat: Pathogenic on sugar cane. 



6. Xanthoinonas barbareae Burkholder, 

 1941. (Phytopath., 31, 1941, 348.) 



bar.ba're.ae. M.L. fem.n. Barbarea ge- 

 neric name of cress; M.L. gen. noun barbareae 

 of Barbarea. 



Rods 0.4 to 0.95 by 1.0 to 3.15 microns. 

 Motile with a single polar flagellum. Gram- 

 negative. 



Gelatin: Liquefied. 



Beef-extract peptone colonies: Circular, 

 yellow, smooth, butyrous, growth moderate. 



Potato glucose agar: Growth abundant, 

 pale 3'ellow. Mucoid. 



Broth: Turbid, j^ellow granular ring. 



Milk: Soft curd, with clearing and produc- 

 tion of tyrosine crystals. Litmus reduced. 



Nitrates utilized but no nitrites produced. 

 Asparagine and nitrites not utilized. 



Hydrogen sulfide produced. 



Indole not produced. 



Lipolytic (Starr and Burkholder, Phy- 

 topath., 32, 1942, 600). 



Acid from glucose, galactose, xylose, 

 maltose, sucrose and glycerol. Alkali pro- 

 duced from salts of malonic, citric, malic 

 and succinic acids. Rhamnose, salicin and 

 hippuric acid salts not utilized. 



Starch hydrolyzed. 



Pectate medium liquefied. 



Aerobic. 



Distinctive characters: Similar to 

 Xanthomonas campestris but does not infect 

 cabbage, cauliflower or horseradish. 



Source: From black rot of winter cress, 

 Barbarea vulgaris. 



Habitat: Pathogenic on leaves and stems 

 of Barbarea vulgaris. 



7. Xanthoinonas begoniae (Takimoto, 

 1934) Dowson, 1939. (Bacterium begoniae 

 Takimoto, Jour. Plant Protect., 21, 1934, 

 262; Dowson, Zent. f. Bakt., II Abt., 100, 

 1939, 190.) 



be.go'ni.ae. Named for B6gon; M.L. 

 fem.n. Begonia generic name; M.L. gen. 

 noun begoniae of Begonia. 



Translated by Dr. K. Togashi. 



Rods 0.5 to 0.6 by 1.2 to 2.0 microns. 



Motile with a polar flagellum. Gram- 

 negative. 



Gelatin: No liquefaction. Liquefaction 

 (Wieringa, Tidschr. Plantziekt., 4I, 1935, 

 312; McCulloch, Jour. Agr. Res., 54, 1937, 

 859; Dowson, op. cit., 1939, 190; Stapp, 

 Arbeiten Biol. Reichsanst. f. Land- u. 

 Forstw., 22, 1938, 392). 



Potato agar colonies: Circular, convex, 

 smooth, moist, shining, yellow. 



Broth: Turbid. Yellow pellicle and pre- 

 cipitation. 



Milk: No coagulation. Casein digested. 

 Alkaline. 



Nitrites not produced from nitrates. 



Indole not produced. 



Hydrogen sulfide produced. 



Lipolytic (Starr and Burkholder, Phy- 

 topath., 32, 1942, 600). 



No acid or gas in peptone broth from 

 glucose, sucrose, lactose or glycerol. Acid 

 from glucose, sucrose, lactose, mannitol and 

 glycerol in peptone-free medium (McCul- 

 loch, op. cit., 1937,859). 



Starch hydrolyzed (Dowson, Jour. Roy. 

 Hort. Soc.,6S, 1938,289). 



Pectate medium not liquefied. 



Temperature relations: Optimum, 27°C. 

 Minimum, between 1° and 3° C. Maximum, 

 37° C. 



Source: Isolated from leaf spot of tu- 

 berous begonia. 



Habitat: Pathogenic on Begonia spp. 



8. Xanthomonas betlicola Patel et al., 

 1951. (Patel, Kulkarni and Dhande, Curr. 

 Sci.,^0, 1951, 106.) 



bet.li'co.la. East Indian betle, the name 

 of the betel, a shrubby vine; L. v. colo to 

 dwell; M.L. fem.n. betlicola the betel- 

 dweller. 



Rods slender, occurring singly or in 

 pairs. Motile. Encapsulated. Gram-nega- 

 tive. 



Gelatin: Liquefied. 



Potato-glucose agar colonies: 11 mm in 

 diameter in 7 days, baryta-yellow, lobate, 

 striations at periphery. 



Broth: Turbid; yellow growth. 



Milk: Litmus reduced. Casein digested. 



Loeffler's blood serum liquefied. 



Indole not produced. 



Hydrogen sulfide produced. 



