Page:Bergey's manual of determinative bacteriology.djvu/189

 plant; M.L. mas.n. Ricinus generic name of the castor bean; L. v. colo to dwell; M.L. fem.n. ricinicola, Ricinus dweller.

Rods, 0.4 to 0.9 by 1.3 to 2.6 microns, occurring in short chains. Encapsulated. Motile with polar flagella. Gram-negative.

Gelatin: Liquefied.

Nutrient agar colonies: Lemon-yellow, changing to brown.

Milk: Slightly acid. No coagulation. Peptonization.

Nitrites not produced from nitrates.

Acid but no gas from lactose.

Starch hydrolyzed.

Temperature relations: Optimum, between 29° and 30° C. Minimum, 2.5° C. Maximum, 39° C.

Aerobic.

Comment: Elliott (loc. cit.) renamed this species to avoid confusion with Phytomonas ricini Archibald.

Source: Isolated from leaf-spot of castor bean.

Habitat: Pathogenic on Ricinus communis.

30. Xanthomonas sesbaniae Patel et al., 1952. (Patel, Kulkarni and Dhande, Curr. Sci., 21, 1952, 74.)

ses.ba'ni.ae. M.L. fem.n. Sesbania generic name of the plant host; M.L. gen.noun sesbaniae of Sesbania.

Rods, 0.7 by 1.3 microns, occurring singly or in chains. Encapsulated. Gram-negative.

Gelatin: Liquefied.

Potato-glucose agar colonies: Circular, 2 cm in diameter in 7 days, with striations starting 5 mm away from the center up to the periphery. Barium-yellow.

Litmus milk: Slightly peptonized with casein digested. Litmus slowly reduced.

Hydrogen sulfide produced.

Nitrites not produced from nitrates.

Acid but no gas from glucose, sucrose and lactose. Salicin not attacked.

Starch hydrolyzed.

Temperature relations: Optimum, 31° C. Thermal death point, 51° C.

Source: Isolated from leaf spots on Sesbania aegyptiaca.

Habitat: Pathogenic on Sesbania aegyptiaca.

31. Xanthomonas stizolobiicola Patel et al., 1951. (Patel, Kulkarni and Dhande, Curr. Sci., 20, 1951, 106.)

sti.zo.Io.bi.i'co.la. M. L. neut.n. Stizolobium generic name of host; L. v. colo to inhabit; M.L. fem.n. stizolobiicola the Stizolobium dweller.

Rods. Mostly single. Encapsulated. Motile. Gram-negative.

Gelatin: Liquefied.

Nutrient agar colonies: 8 mm in diameter in 4 days, flat, entire, glistening, creamy to pinard-yellow.

Broth: Good growth.

Synthetic asparagine medium: No growth.

Loeffller's blood serum: Liquefied in 10 days.

Hydrogen sulfide produced.

Nitrites not produced from nitrates.

Methyl red negative; acetylmethylcarbinol not produced.

Indole not produced.

Acid but no gas from glucose, lactose and sucrose. Salicin not attacked.

Starch and casein hydrolyzed.

Lipolytic.

Salt tolerance: Up to 3 per cent.

Optimum temperature, between 28° and 30° C.

Aerobic.

Relationship to other species: Elliott (Man. Bact. Plant Path., 2nd ed., 1951, 129) lists Xanthomonas phaseoli on Stizolobium deeringianum. The two pathogens appear similar.

Source: Isolated from leaves, stems and petioles of Stizolobium deeringianum in India.

Habitat: Pathogenic on Stizolobium deeringianum.

32. Xanthomonas taraxaci Niederhauser, 1943. (Phytopath., 33, 1943, 961.)

ta.ra.x'a.ci. M.L. neut.n. Taraxacum generic name of host; M.L. gen.noun taraxaci of Taraxacum.

Rods, 0.7 to 1.2 by 1.4 to 3.3 microns, occurring singly or in pairs. Motile with a single polar flagellum. Gram-negative.

Gelatin: Rapid liquefaction.

Beef-extract peptone agar colonies: Circular, smooth, bright yellow. Growth moderate.