302 



INORGANIC NUTRITION AND METABOLISM 



the early stages of growth and is converted in the cells to organic com- 

 pounds (69, 134). Absorption is dependent upon oxygen and a respir- 

 able substrate and is inhibited if respiration is poisoned (79, 134, 205). 

 The rate of absorption is retarded if available carbon or nitrogen is 



Table 1. Phosphatases of Fungi and Actinomycetes 



Substrate 

 Beta-glycerophosphate, 

 sugar phosphates, 

 /;-nitrophenyl phos- 

 phate, etc. 



Beta-glycerophosphate 



Glucosamine-6-phosphate 

 Adenosine triphosphate 



Adenosine monophos- 

 phate 



Monoallyl phosphate 



Colloidal polymetaphos- 

 phate 



Low molecular weight 

 metaphosphate 



Pyrophosphate 



Action 

 Hydrolysis at 

 acid pH 



Hydrolysis at 

 alkaline pH 



Hydrolysis 

 Hydrolysis 



Hydrolysis 



Hydrolysis 

 Depolymeriza- 



tion 

 Hydrolysis 



Hydrolysis 



Organisms 



Actinomyces Israeli (90), Aspergillus 

 flavus* (251), A. niger (132, 134), 

 A. oryzae (39, 41, 42, 179), Can- 

 dida albicans, f Cryptococcus spp.,f 

 Geotrichum candidum,\ and Torula 

 cremoris\ (16), Streptomyces coeli- 

 color (38), Torulopsis utilis (193) 



Allomyces javanicus\ (248), Aspergillus 

 flavus* (251), A. oryzae* (7), Can- 

 dida albicans^ (16), Microsporum 

 canis (34), Penicillium chrysogenum 

 (206,207), Torula cremoris\, (16). 

 Trichophyton rubrum\ (172) 



Neurospora crassa (24) 



Aspergillus niger (112, 134), Penicil- 

 lium chrysogenum (110, 111) 



Aspergillus niger (132, 134), Penicil- 

 lium chrysogenum (206) 



Aspergillus niger (8) 



Aspergillus spp., Penicillium spp. J 

 (95, 96, 97, 98, 111, 132) 



Aspergillus spp. (105, 106, 111, 112, 

 135) 



Aspergillus spp. (109, 132, 135, 159, 

 160, 164, 179), Penicillium chryso- 

 genum (109, 206) 



Aspergillus niger (132), A. oryzae § 

 (159, 160, 161) 



Aspergillus niger (111, 112, 113) 



Aspergillus niger (50, 134), Penicillium 

 chrysogenum (206) 



Aspergillus spp. (56) 



Triphosphate Hydrolysis 



Polyphosphates Hydrolysis 



Phytic acid Hydrolysis 



Thionophosphate Hydrolysis 



* Two pH optima. 



f Histochemical method. 



t No depolymerization by extracts from Phycomyces blakesleeanus, Rhizopus nigri- 

 cans, Collybia velutipes, Marasmius spp., Merulius domesticus, Polyporus betulinus, or 

 Tricholoma equestre. 



§ Two enzymes. 



