326 



GENERAL INDEX 



Population studies, methods 



microscopic, 20 



plate, 24 



selective culture, 25 

 Porphyrin biosynthesis, 194, 195 

 Potato scab 



biological control, 272 



causative organisms, 265 



control by Slreptomyces praecox, 210, 211 



environmental effect, 267-270, 272 



relation of host to parasite, 270 



treatment, effect of, 271 

 Preservation of cultures, methods, 26, 128 

 Prodigiosin pigments, 202 

 Progesterone metabolism, 152 

 Protease production, 140, 183, 185 

 Proteolytic activities, 153 

 Psychrophilic organisms, 134 

 Pyocyanase, 207 



Pyridoxine, production by Strcptoiiiyces oUvaceus, 

 194 



Relation of actinomycetes to bacteria and fungi, 

 1, 13, 53, 71 



Rennet production, 185 



Reproduction, methods, 75, 78, 84, 86 



Resistance to metabolic products and antimi- 

 crobial substances, 109 



Respiration of Nocardias, carbohydrates in, 151 



R-forms, 96 



Rhodomycin, 202 



Riboflavin production, 193, 194 



Rubber decomposition, 155, 247 



Saprophytic actinomycetes, 251, 255 

 Sarkomycin, effect on growth of broad beans, 196 

 Scab, see Potato scab, Sugar beet scab, Mangel 



scab 

 Sclerotia formation in a streptomyces, 81 

 Screening methods 



antifungal surveys, 215 



relation between antimicrobial activity and 

 ])igmentation, 217 



for specific antibiotic producers, 217 



in study of antagonistic properties, 211 



test organisms, 216, 219 

 Sectoring, 98, 107 

 Serological relations among actinomycetes, 166, 



167 

 Sexuality, 74 

 S-forms, 95 

 Soil 



actinomycetes 



antagonistic, 209, 211-215, 222 



factors controlling, 37 

 seasonal variation, 30, 34 

 variation with depth, 31 

 enrichment with pathogens, 222, 223 

 processes, role of actinomycetes in, 9 

 Spiromycin, 238 

 Spoilage, agents of, 250 

 Spores 

 chains, 85 

 distribution of types among groups of Strepto 



)in/ccs, 86 

 formation of different types, 71, 77, 79, 82, 84 

 germination, 19, 73 

 role in characterization of species, 85 

 Sporophores of Streptomyces , 54, 55, 58-60, 82, 83 

 Sporulation, as affected by cobalt, 143 

 Staining, 77 



Starch decomposition, 155 

 Steroid oxidation, 191 

 Stimulants, microbial, 137 

 Streptomycin 



antibacterial activity, 230 



biosynthesis, 163-166 



destruction by deguanidases, 186 



effect on Mycobacterium tuberculosis, 234 



production 



as affected by actinophage, 176, 177 



as affected by catalase activity, 190 



by Streptomyces bikiniensis , 141 



by Streptomyces griseus, 115, 119, 133, 138-141, 



145, 151 

 relation to autolysis, 171 

 properties, 230, 233 

 protective effect on potato plant, 276 

 Streptothricin, production and properties, 222 

 Streptothrix, historical significance of name, 51 

 Streptovaricin, production and properties, 238 

 Sugar beet scab, 274 

 Sweet potato pox, 275 

 Symbiosis with insects, 195 



Temperature, influence, 133 

 Tetracyclines 



pigment jjroduction in presence of metals, 206 



production and properties, 237 

 Thermophilic organisms, 134 

 Thiamin production, 193, 194 

 Thioaurin, 205 

 Thiolutin, 205 

 Triose phosphate dehydrogenase, production by 



Streptomyces coelicolor, 189 

 Triose phosphate isomerase, |)r(i(luction by Strcp- 



toDiyces coelicolor, 189 

 Tyrosinase, 191 



