Waksman 



58 



Actinomycetes 



Reproduction can also occur by the vegetative process, namelv, 

 through the growth of pieces of mycehum, and by the formation of 

 buds, which gradually grow into branches, as well as by means of the 

 chlamydospores. The germination of these spores is similar to that of 

 the other reproductive bodies, independent of the hyphae in which they 

 are produced (234). 



Fig. 14.— Aerial mycelium of a Streptomyces, showing zonation or "fairy ring" 

 formation Qrom Lieske, 260). 



Sporulation of the Microvionospora is distinct from that of the other 

 genera. The monopodially branched mycelium is similar to that of the 

 other actinomycetes. The conidia are formed on special branches, 

 which are straight and short— 5-1 OiJ. long— and which frequently give 

 rise to other branches, thus producing group-like structures similar to 

 bunches of grapes. Each branch bears at the end a single spore, pro- 



