Essential oil variations among the natural populations of Francoeuria undulata

Document Type : Original Research Papers


1 Department of Horticulture, Jahrom Branch, Islamic Azad University, Jahrom, Iran

2 Department of Biology, Jahrom Branch, Islamic Azad University, Jahrom, Iran


Francoeuria undulata (L.) LACK is often synonymous with two species of the genus Pulicaria,
i.e. Pulicaria undulata (L.) C.A. Mey and Pulicaria crispa (Forssk.) olive, which are often
included under the genus Francoeuria. The essential oil yield and compositions in the five
natural populations of Francoeuria undulata from Fars Province in southern Iran were
determined by GC and GC/MS analysis. The essential oil yields ranged between 0.34 and
0.52% (w/w) with a mean of 0.42%, in the five populations studied. Fifty-six compounds were
identified in the oil samples, representing 92.9% of the total oil. Eighteen major compounds
detected in the oil samples at an average concentration of about 1% of the total oil in the five
populations have been considered for statistical analyses. The main components included 1,8-
cineol (21.1%), alloaromadendrene epoxide (16.9%), eudesma-4(15),7-dien-1-ß-ol (15.7%), α-
terpineol (8.1%), α-pinene (5.0%) and terpinen-4-ol (5.0%). By evaluating the changes in the
essential oil components, we have concluded the existence of a high intraspecific genetic
variation among the Francoeuria undulata populations. Based on the canonical discriminant
functions the analysis enabled the identification of four chemotypes. Moreover, the presence of
trans-methyl dihydrojasmonate and high levels of oxygenated mono- and sesquiterpenes in the
essential oils of the plant, indicate the high chemical defensive ability of Francoeuria undulata.


Main Subjects

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