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Hormonal Interactions in Mucor mucedo and Blakeslea trispora
Authors:H. Van Den Ende   A. H. C. A. Wiechmann   D. J. Reyngoud     T. Hendriks
Abstract:Evidence is presented that progametangia in both the plus and the minus mating types of Mucor mucedo can be induced by one substance, namely (-)-trisporic acid B. A method is described for the determination of the concentration of the sex factors (trisporone, trisporic acid B, trisporic acid C) in mated cultures of Mucorales by polarography. It can be demonstrated that the amount of plus mycelium is limiting for the production of the sex factors in Blakeslea trispora. It is shown that the minus type of this organism is able to synthesize the sex factors when incubated in the filtered medium of a mated culture. Cycloheximide and 5-fluorouracil inhibit strongly the sex factor production in a mated culture of B. trispora at any time. This result suggests that sexual activity comprises the synthesis of proteins which are involved in the production of the sex factors.
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