GROUPS AM) SPECIES OF GENUS STREPTOMYCES 



b 1 . Cultures green. 

 a 2 . Saprophytes. 



Actinomya s i iridis 

 l) 2 . Planl parasites. 



Actinomya s cr< taceus 

 c'. Cultures brown. 



Actinomyces globosus 

 I). Spores cylindrical or elongated. 

 a 1 . Cult ures colorless. 



Actinomyces candidxis 

 b 1 . Cultures pigmented. 



Actinomya s cylindrosporus 

 2. Spores produced by means of segmenta 



linn of aerial hypliae. 



a. Cultures colorless. 



Actinomyces farinosus 



b. ( 'ult ures pigmented red. 



Actinomyces oidiosporus 

 Actinomyces rectus 



c. < lultures yellow orange. 



.1 ctinomyces longissimus 



d. ( lultures blue. 



Actinomya s cm ruh us 

 o. Cultures brown. 



Actinomya s fumosus 

 B. Sporophores produced in verticils. 

 I. Sporophores s1 raighl . 



Actinomyces vi rticillatus 

 1 1 . Sporophores spiral -shaped. 

 I . Spores spherical, oval. 



Actinomyces reticuli 

 Actinomyces reticulus ruin >■ 

 •_'. Spores cylindrical . elongated. 



Actinomyces circulatus 



9] 



faint brown 



a. figmeni absenl 



only. 



1). Pigmenl blue. 



c Pigmenl at first green, becoming 

 brown, etc. 

 "_'. Soluble pigmenl on organic media 



brown. 

 •'!. No soluble pigmenl produced in or- 



ganic media. 



a. Proteolyl i<- action strong. 



I). Proteolyl ic act ion limited. 



c. Proteolytic ael ion very weak. 



B. Saprophytes; thermophilic. 



1. Yellowish growth on potato; dia- 

 static. 



2. Dark-colored abundant growth on 

 potato; nondiastatic. 



3. Thermotoleranl cultures. 



C. Plant parasites oi cultures isolated from 



diseased plants or from soil in which 

 diseased plants were grown. 



1. Isolated from potato scab or from 

 soil in which scabby potatoes were 

 grown. 



2. drown on or isolated from sweet 

 potatoes. 



3. Isolated from scat) on mangels and 



)f the larger groups of the genus, notably 

 o the Albus and Flavus groups, as will lie 

 shown in ( Ihapter ('». 



sugar beets. 

 Detailed consideration was given to some D. Isolates from animal tissues; in the 



animal body, hyphae often show clavate 

 enlargements at the ends. 



1. Limited proteolytic action. 



2. St rone; proteolytic action. 

 I-]. Produce only substrate growth and no 



aerial mycelium. 

 The last system, like the earlier ones, may 

 now be considered as of purely historic in- 

 terest, lor the purpose of this treatise, it 

 has been considerably modified. It has been 

 greatly enlarged to include all newly <\c- 

 scribed organisms belonging to the genus 



."). WAKSMAN AND HENRICJ SYSTEM (1943 



This system was used in the last two edi- 

 tions of Bergey's Manual of Determinative 

 Bacteriology I L948, L957). It may be listed 

 here among the earlier systems. It was 

 based primarily upon the ecology of the 



organisms, product] >f soluble pigments 



in organic and synthetic media, and proteo- 

 lyl ic proper! ies. 



A. Saprophytes; psychophilic to mesophilic. Streptomyces. Some of the feature- of the 

 I. Soluble pigmenl on organic media older system, notably those pertaining to 



other than brown, or faint brown. ecology, have been left out altogether. 



