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

@article{Kaplanis1967InsectHA,
  title={Insect Hormones: Alpha Ecdysone and 20-Hydroxyecdysone in Bracken Fern},
  author={John N. Kaplanis and M. J. Thompson and William E. Robbins and B. M. Bryce},
  journal={Science},
  year={1967},
  volume={157},
  pages={1436 - 1438}
}
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. 
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  • Biology, Medicine
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TLDR
In the present review, the distribution, biosynthesis, biological significance and potential applications of phytoecdysteroids are summarized. Expand
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A sesquiterpenoid ester with high juvenile hormone activity for Pyrrhocoris apterus (L.) was isolated from balsam fir, Abies balsamea (L.) Miller, and identified as the methyl ester of todomatuicExpand
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After submitting the manuscript, we found that 20-hydroxyecdysone has also been isolated from another fern
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[Structure of beta-ecdysone (1)].
Adsorbents used were Woelm neutral grade-I alumina deactivated with 20 percent water and silicic acid (Unisil, 100 to 200 mesh
  • Chromatography on silica gel previously used in fractionating insect material (5) was omitted
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