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Biotype Selection in Erigeron annuus During Old Field Succession
J. F. Hancock, Jr. and R. E. Wilson
Bulletin of the Torrey Botanical Club
Vol. 103, No. 3 (May - Jun., 1976), pp. 122-125
Published by: Torrey Botanical Society
Stable URL: http://www.jstor.org/stable/2484887
Page Count: 4
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Individuals of Erigeron annuus were collected from adjacent old fields in various stages of ecological succession. The biotype of each individual was determined using gel electrophoresis and the zymogram technique. Starch gels were used for the separation of malic dehydrogenase, acid phosphatase and peroxidase isozymes; acrylamide gels were used for the separation of chlorogenic acid oxidase isozymes. Biotype frequencies were calculated for each of the field populations. Significant differences in biotype frequency were found among the populations, suggesting the species is made up of a complex of differentially adapted biotypes.
Bulletin of the Torrey Botanical Club © 1976 Torrey Botanical Society