Studies in carotenogenesis. 5. Carotene production by various mutants of Phycomyces blakesleeanus and by Phycomyces nitens

Publisher Website
Google Scholar
Abstract
The growth, lipid and carotene production of the following were compared with those of P. blakesleeanus (-): P. blakesleeanus var. piloboloides (+ and - strains), P. blakesleeanus mutant gracilis (+). P. blakesleeanus mutant pallens (-). and P. nitens (+). Lipid production was the same in all; growth was the same in all but P. nitens, which produced about 70% as much dry substance as the others. Carotene synthesis in all the (-) strains was the same; in all the (+) strains except gracilis (+), carotene synthesis was about half of that in the (-) strain. The gracilis (+) mutant produced as much as a normal (-) strain. The rate of synthesis of carotene was the same in all except gracilis (+), in which it was much more rapid. The same polyenes occurred in all the mutants and in the same relative amts.