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Asian Journal of Plant Sciences
Year: 2009  |  Volume: 8  |  Issue: 1  |  Page No.: 59 - 63

Foliar Sesquiterpene Variations in Natural Populations of Cupressus dupreziana in Tassili N`Ajjer (Algeria)

M. Ramdani and T. Lograda    

Abstract: Cupressus dupreziana A. Camus (Cupressaceae) is an endemic species in the Tassili n`Ajjer (Algerian Central Sahara). Terpenoid analysis were carried out on 160 trees of 12 natural populations with a view to determining the intra-specific variability. Eighteen sesquiterpenes were detected, including germacrene-D, which was found to be particularly abundant. The terpenoid markers used made it possible to determine the individual patterns of chemotypic variability. The variability of the sesquiterpene composition confirms that genetic factors were not responsible for the decrease in the numbers of this species. The main reason for this decrease is probably the desertification of the Tassili n`Ajjer.

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