SERIES AND SPECIES OF GENUS STREPTOMYCES 



117 



2. It did qo1 form any dark brown pig- 

 menl . 



3. It was now able to utilize fructose, 

 mannitol, rhamnose, xylose. 



1. It showed no or very weak antagonistic 

 action. 



Od the basis of the above properties, 

 Okami divided the S. lavendulcu series into 

 10 subgroups ( Table 26). 



Table 24 



Antibacterial activity of different strains of 



Streptomyces lavendulae (Okami, 1050 i 



Baldacci considered S. lavendulae as a 

 distinct group. Krassilnikov, however, 

 looked upon these organisms as members of 

 the "chromogt nus" group. Gause et al. 

 created a series under the name "lavt minim - 

 roseus" and subdivided it into three sub- 

 groups, based upon the formation of a solu- 

 ble pigmenl in organic media: (1) The first 

 included cultures that formed no soluble 

 pigment, such as S. virginiae; (2) The second 

 included S. venezuelae, S. lavendulae, and S. 

 circulatus, as well as a variety of others, all 

 of which formed a brown to black pigmenl 

 in organic media; (3) The third produced a 

 yellow pigment. As the requirements for the 

 group S. lavendulae presented above indicate, 

 neither the first nor the third of these sub- 

 groups belong to this group. 



Sanchez-Marroquin (1958) found that 

 three related species of Streptomyces produc- 

 ing a pink to lavender aerial mycelium on 

 synthetic media could be distinguished from 

 one another as follows: (a) S. fradim pro- 

 duces spirals on short branches; (b) S. 

 lavendulae forms spirals at the tip of long 

 straight branches; (<•) S. venezuelat forms no 

 spirals, but only straight sporophores; the 

 first is nonchromogenic and the lasl two 

 are chromogenic. The Lavendulm series was 



T \ki.k 25 

 Effect of composition of medium on reciprocal antagonism between different strains of 

 Streptomyces lavendulae (Okami, 1956) 



VGA = yeast extract-glucose; ASP = asparagine -glucose. 



