FAMILY IV. PSEUDOMONADACEAE 



129 



at.ro.fa'ci.ens. L. ater black; L. facio to 

 make;M.L. part. adj. atrofaciens blackening. 



Rods 0.6 by 1.0 to 2.7 microns. Long 

 chains formed in culture. Encapsulated. 

 Motile with 1 to 4 polar or bipolar flagella. 

 Gram-negative 



Green fluorescent pigment produced in 

 culture. 



Gelatin: Liquefied. 



Beef-peptone-agar colonies: Circular, 

 shining, translucent, white. 



Broth: Growth never heavy, slight rim, 

 and a delicate pellicle. 



Milk: Becomes alkaline and clears. 



Nitrites produced from nitrates (Burk- 

 holder and Starr, Phytopath., 38, 1948, 498). 



Indole: Slight production. 



Hydrogen sulfide: Slight production. 



Acid but no gas from glucose, galactose 

 and sucrose. 



Starch is slightly hydrolyzed. 



Temperature relations : Optimum between 

 25° and 28° C. Minimum below 2° C. Maxi- 

 mum between 36° and 37° C. 



Aerobic. 



Source: Isolated from diseased wheat 

 grains collected throughout the United 

 States and Canada. 



Habitat: Causes a basal glume-rot of 

 wheat. 



80. Pseudomonas cuniini (Kovachev- 

 ski, 1936) Dowson, 1943. {Phytomonas cumini 

 Kovachevski, Bull. Soc. Bot. Bulgarie, 7, 

 1936, 27; Dowson, Trans. Brit. Mycol. Soc, 

 m, 1943, 10.) 



cu'mi.ni. Gr. cuminum cumin; M.L. 

 neut.noun Cuminum generic name of cu- 

 min; M.L. neut. gen. noun cumini of cumin. 



Rods, 0.5 to 0.7 by 1.0 to 3.0 microns, oc- 

 curring in chains and filaments. Motile with 

 1 to 3 polar fiagella. Gram-negative. 



Green fluorescent pigment formed in cul- 

 ture. 



Gelatin: Rapidly liquefied. 



Potato agar colonies: Grayish white, cir- 

 cular, glistening, smooth, butyrous. 



Broth: Moderate turbidity. Pseudozoo- 

 gloea. 



Milk: Not coagulated. Casein peptonized. 



Nitrites not produced from nitrates. 



Indole not produced. 



Hydrogen sulfide not produced. 



Acid but no gas from glucose and sucrose. 

 No acid from lactose or glycerol. Starch not 

 hydrolyzed. 



Temperature range, 5° to 31° C. 



Aerobic. 



Source: Isolated from blighted cumin 

 (Cuminian). 



Habitat: Pathogenic on cumin and dill. 



81. Pseudomonas desaiana (Burk- 

 holder, 1939) Savulescu, 1947. (B. pyo- 

 cyaneiis saccharum Desai, Ind. Jour. Agr. 

 Sci., 5, 1935, 391; Phytomonas desaiana Burk- 

 holder, in Bergey et al., Manual, 5th ed., 

 1939, 174; Savulescu, Anal. Acad. Romane, 

 III, 22, 1947 11.) 



de.sai.a'na. M.L. adj. desaianus. Named 

 for Prof. Desai of India. 



Rods 0.6 to 1.2 by 1.2 to 2.2 microns. Mo- 

 tile with a polar flagellum. Gram-negative. 



Green fluorescent pigment produced in 

 culture. 



Gelatin: Liquefied. 



Agar colonies: Grayish blue. Raised. 



Broth: Light clouding. Pellicle. 



Milk: Peptonized without coagulation. 



Nitrites not produced from nitrates. 



Indole not produced. 



Glucose, sucrose, lactose and gh'cerol fer- 

 mented without gas. 



Starch: Hydrolysis present. 



Optimum temperature, 30° C. 



Aerobic. 



Source: Isolated from stinking rot of 

 sugar cane in India and associated with a 

 white non-pathogenic bacterium. 



Habitat: Pathogenic on sugar cane, Sac- 

 char u m officinaru tn . 



82. Pseudomonas erodii Lewis, 1914. 

 (Phytopath.,.^, 1914,231.) 



e.ro'di.i. Gr. erodius the heron; M.L. 

 neut.noun Erodium generic name of heron- 

 bill; M.L. neut. gen. noun erodii of Erodium. 



Rods 0.6 to 0.8 by 1.2 to 1.8 microns. 

 Motile with 1 to 3 polar flagella. Gram- 

 negative. 



Green fluorescent pigment produced in 

 culture. 



Gelatin: Liquefied. 



Agar streak: Heavy, smooth, cream- 

 colored growth in 24 hours. 



Broth: Dense clouding in 24 hours. 



