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Sexual hormones in Achlya. V. Hormone A', a male-secreted augmenter or activator of hormone A

Raper, John R. (1942) Sexual hormones in Achlya. V. Hormone A', a male-secreted augmenter or activator of hormone A. Proceedings of the National Academy of Sciences of the United States of America, 28 (12). pp. 509-516. ISSN 0027-8424.

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The role of specific sexual hormones in the sexual reaction of two heterothallic species of Achlya has been described in earlier papers of this series.(1) Four specific substances were postulated, two secreted by the ♀, bringing about specific reactions in the ♂ , and two secreted by the ♂, inducing specific responses in the ♀. On the basis of evidence available at that time it seemed that the entire sexual reaction was initiated with the secretion of hormone A by the vegetative mycelium of the ♀, which induced the formation of sexual organ initials, antheridial branches, on the ♂. In the course of a more detailed analysis of the response of the ♂ plant to hormone A from the ♀, (2) it was found that the vegetative mycelium of the ♂ secreted some factor which profoundly influenced its response to hormone A from the ♀. This factor, produced by the vegetative ♂ plant independently of any response to the ♀, will hereafter be referred to as hormone A' (A prime).

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Additional Information:© 1942 by the National Academy of Sciences. Communicated November 2, 1942. The early portions of this work were conducted in the Kerckhoff Biological Laboratories of the California Institute of Technology, Pasadena, Calif., during the tenure of a National Research Fellowship in Botany. Report of work carried out with the aid of Works Progress Administration, official project No. 165-1-07-172, Work Project No. N-12165. The author wishes to express his indebtedness to Mr. Harvey W. Tomlin for his invaluable assistance.
Issue or Number:12
Record Number:CaltechAUTHORS:RAPpnas42
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7266
Deposited By: Tony Diaz
Deposited On:25 Jan 2007
Last Modified:02 Oct 2019 23:40

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