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Distribution of Miserotoxin in Varieties of Astragalus miser Dougl. ex Hook.

Published online by Cambridge University Press:  12 June 2017

M. Coburn Williams  and
Frank A. Norris
M. Coburn Williams
Affiliation:
Crops Research Division, Agr. Res. Serv., U. S. Dep. of Agr., in cooperation with the Utah Agricultural Experiment Station, Logan, Utah
Frank A. Norris
Affiliation:
Department of Chemistry, Utah State University, Logan
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Abstract

A method was developed for quantitative determination of miserotoxin, a poison in timber milkvetch (Astragalus miser Dougl. ex Hook.). The presence and concentration of miserotoxin was determined in eight varieties of timber milkvetch. The seasonal variation in the concentration of the poison was followed in variety oblongifolius (Rydb.) Cron. Miserotoxin occurred primarily in the leaves with smaller amounts in the roots, flowers, and seeds. The poison level in leaves and stems decreased rapidly after seed dispersal. Miserotoxin was found in varieties oblongifolius (Rydb.) Cron., serotinus (Gray) Barneby, and hylophilus (Rydb.) Barneby, but was not found in varieties miser Dougl. ex Hook., tenuifolius (Nutt.) Barneby, crispatus (Jones) Cron., praeteritus Barneby, and decumbens (Nutt.) Cron. The three varieties containing miserotoxin were poisonous to 1-week-old chicks (Gallus domesticus, Arbor Acre 50 × Vantress hybrids); the other five varieties were not poisonous.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 2 , April 1969 , pp. 236 - 238
Copyright
Copyright © 1969 Weed Science Society of America 

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References

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