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186 Phytologia (August 2010) 92(2) CHEMOSYTEMATICS OF JUNIPERUS: EFFECTS OF LEAF
 

Summary: 186 Phytologia (August 2010) 92(2)
CHEMOSYTEMATICS OF JUNIPERUS: EFFECTS OF LEAF
DRYING ON ESSENTIAL OIL COMPOSITION
Robert P. Adams
Biology Department, Baylor University, Box 97388, Waco, TX
76798, USA
email Robert_Adams@baylor.edu
ABSTRACT
The essential oils of leaves of J. pinchotii and J. virginiana
tree were collected and analyzed as fresh vs. air dried then stored at
ambient conditions (21 C) for various periods before extraction. The
leaf oils of both species proved to be remarkably stable. For J.
virginiana, ANOVA of the 58 components revealed only 9 significant
and 4 highly significant differences among the 7 sample sets. PCO of
the samples showed some clustering by length of storage, but
considerable intermixing of samples. Drying J. virginiana leaves under
extreme conditions (fresh vs. 30 C, 60 C, 100 C) revealed
considerable changes in the oils at the highest drying temperature (100
C) with the loss of more volatile monoterpenes, and a relative increase
(on a % total oil basis) of the diterpenes. Surprisingly, there was little

  

Source: Adams, Robert P. - Department of Biology, Baylor University

 

Collections: Biology and Medicine