Premium
DIURNAL VARIATION IN THE TERPENOIDS OF JUNIPERUS SCOPULORUM (CUPRESSACEAE)—SUMMER VERSUS WINTER
Author(s) -
Adams Robert P.
Publication year - 1979
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1979.tb06310.x
Subject(s) - cupressaceae , biology , diurnal temperature variation , botany , juniper , terpenoid , horticulture , atmospheric sciences , pollen , geology
Samples of Juniperus scopulorum taken in January, 1977, were compared to samples of July, 1975. Only one significant difference was found in the winter sample compared to thirteen in the summer, 1975 sample. Five compounds showed significant changes from day to day in the winter compared to eleven in the summer. Thirty‐two compounds showed significant differences among trees in the winter in contrast to thirty‐six significant differences in the summer. Diurnal variation can apparently be minimized by sampling during the most dormant period and is strongly encouraged for chemosystematic studies.