SERIES AND SPECIES OF GENUS STREPTOMYCES 1 »!) 



Eighl of the cultures produced straighl to black. On organic media, soluble pigmenl 



sporophores and II formed spiral-shaped is brown to deep brown to olive or purple or 



sporophores. The color of the aerial myce- black. 



limn of the substrate growth varied from The sporophores form spirals. 



yellow to reddish-brown. Some produced a This series is widely represented in nature 



melanin pigmenl and others did not, thus by a number of species, namely: S. virido- 



automatically excluding the lasl as members chromogenes, S. chartrensis, and S. cyaneus. 

 of the Lavi ndulcu series. They varied greatly 



in their antagonistic properties, some in- XIV. Series Cinnamomeus 

 hibiting the growth of all bacteria and fungi 



tested, and others having no effect either on Characteristic Properties 



gram-negative bacteria or on certain fungi. a. Sporophores produced in verticils. 



The following antibiotics were listed a- b. Aerial mycelium white, yellow, or 



product- of the Lavendulat series, thus sug- pinkish. 



gesting the possible specific differences in c. Substrate growth yellowish to pinkish. 



the series: streptothricin, streptin, ant ismeg- d. Melanin-negative, 



matis factor, antibiotic L36, lavendulin. This series is characterized by the forma- 



actinorubin, pleocidin, ehrlichin, actithiazic tion of verticil-bearing sporophores. The 



acid, antibiotic MD 2428, and grasseriomy- verticils are both primary and secondary. 



cin. Spirals usually are not produced, although 



occasionally some spirals are formed. The 



XII. Series Erythrochr onto genes species within this series are melanin-nega- 



tive, although a purplish pigmenl may be 

 produced on certain organic media. The 



This is a large melanin-positive series oi 



organisms. The aerial mycelium is usually 



. •, ,, li • i 'i 111/ aerial mycelium is white to pinkish to cin- 



white with a yellowish or brownish shade to " . , _, ' 



• ., iii • i i i •. • namon-colored. Ihe substrate growth is 



gray with a bluish or greenish shade; it is ,, • , , 



,.' ,,., . , ,,,, , . yellowish to brown to pmkisl 



often reddish to brown. Ihe substrate ..„ . .... 



The species included in this series can be 

 listed here: S. hachijoensis, S. fervens, and 

 S. cinnamorm us. 



growth is colorless to orange to red or even 

 brown to black. Certain species placed in 

 this group often produce a greenish-yellow 

 or reddish-brown to almost black soluble 

 pigmenl on synthetic media, d he sporo- 

 phores are straight or produce spirals. Characteristic Pro-pi Hi 



This melanin-positive series comprises a 

 large number of species, such as represented 



\A . Series Reticuli 



Sporophores produced in verticils 

 Tt or spiral-shaped, on the primary oi 



by the following: S. erythrochr omoaenes, S. 



,'.,. . a . ' secondary aerial hyphae. 



booiliae. and 6. cinereoruber . , . . . .: 



o. Aerial mycelium white to era\ 



XIII. Series \ iridochromoiU'iies 



c. Melanin-positive. 



This is one of the two series within the 

 This melanin-positive series of organisms genus Streptomyces which are differentiated 

 is characterized by an ash-gray to greenish from the other members of the genus pri- 

 to olive-green to bluish aerial mycelium, marily by their morphology. Species within 

 The substrate growth is cream-colored to tin- series are characterized by the radial 

 brown to greenish to black. Soluble pigmenl arrangement of the sporophores, whereby 

 on inorganic media is yellowish to greenish three or more branches originate from ;| 



