Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Science 22 September 1967:
Vol. 157. no. 3795, pp. 1436 - 1438
DOI: 10.1126/science.157.3795.1436
Prev | Table of Contents | Next

Articles

Insect Hormones: Alpha Ecdysone and 20-Hydroxyecdysone in Bracken Fern

J. N. Kaplanis 1, M. J. Thompson 1, W. E. Robbins 1, and B. M. Bryce 1

1 Insect Physiology Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Beltsville, Maryland 20705

The two major molting hormones of insects, alpha ecdysone and 20-hydroxyecdysone, were isolated in crystalline form from dry pinnae of the bracken fern, Pteridium aquilinum (L.) Kuhn. Three unidentified substances with molting hormone activity were also detected. Bracken is the first plant found to contain both of the major insect ecdysones, and it is the first known plant source of alpha ecdysone.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Biosynthesis of agr-Ecdysone by Prothoracic Glands in vitro.
H. Chino, S. Sakurai, T. Ohtaki, N. Ikekawa, H. Miyazaki, M. Ishibashi, and H. Abuki (1974)
Science 183, 529-530
   Abstract »    PDF »
Butterfly Feeding on Lycopsid.
M. C. Singer, P. R. Ehrlich, and L. E. Gilbert (1971)
Science 172, 1341-1342
   Abstract »    PDF »
Allelochemics: Chemical Interactions between Species.
R. H. Whittaker and P. P. Feeny (1971)
Science 171, 757-770
   PDF »
Ecdysone Analog: Conversion to Alpha Ecdysone and 20-Hydroxyecdysone by an Insect.
J. N. Kaplanis, W. E. Robbins, M. J. Thompson, and A. H. Baumhover (1969)
Science 166, 1540-1541
   Abstract »    PDF »
Photoperiod, Endocrinology and the Crustacean Molt Cycle.
D. E. Aiken (1969)
Science 164, 149-155
   PDF »
Ecdysones and Analogs: Effects on Development and Reproduction of Insects.
W. E. Robbins, J. N. Kaplanis, M. J. Thompson, T. J. Shortino, C. F. Cohen, and S. C. Joyner (1968)
Science 161, 1158-1160
   Abstract »    PDF »
Bracken and Locust Ecdysones: Their Effects on Molting in the Desert Locust.
D. B. Carlisle and P. E. Ellis (1968)
Science 159, 1472-1474
   Abstract »    PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)