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Title: Needle terpenoid composition of Pinus halepensis (Mill.) Trees infested by the scale insect Marchalina hellenica (Genn.) in Greece

Author: Gallis, Athanassios; Arrabal, Carlos; Papageorgiou, Aristotle C.; Garcia-Vallejo, Maria C.;

Date: 2012

Source: In: Sniezko, Richard A.; Yanchuk, Alvin D.; Kliejunas, John T.; Palmieri, Katharine M.; Alexander, Janice M.; Frankel, Susan J., tech. coords. Proceedings of the fourth international workshop on the genetics of host-parasite interactions in forestry: Disease and insect resistance in forest trees. Gen. Tech. Rep. PSW-GTR-240. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture. pp. 304-308

Publication Series: General Technical Report (GTR)

   Note: This article is part of a larger document. View the larger document

Description: Needle terpenoid composition was determined by using GLC-MS in Pinus halepensis (Mill.) trees that were infested and not infested by the scale insect Marchalina hellenica. The study area was within the Forest National Park of the Cape Sounion, southern Attica region, Greece. A total of 43 compounds, 32 of which were identified, were detected, including monoterpenes, sesquiterpenes, and neutral diterpenes. The healthy trees showed higher mean concentration for the monoterpenes fraction as well as for the diterpene fraction than the mean concentration of infested trees; whereas, the concentration for the sesquiterpene fraction was more or less similar in infested and non-infested trees. The statistical analysis of terpene data showed the existence of quantitative differences between healthy and infested trees mainly for the components β-caryophyllene, neoabietal, α- humulene, cembrene, and neoabietol. A Ward cluster analysis based on selected major compounds classified all trees in two chemotypes, with the majority of healthy trees belonging to one chemotype and most of the infested trees belonging to the second.

Keywords: Pinus halepensis, Marchalina hellenica, needle terpenoids

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Gallis, Athanassios; Arrabal, Carlos; Papageorgiou, Aristotle C.; Garcia-Vallejo, Maria C. 2012. Needle terpenoid composition of Pinus halepensis (Mill.) Trees infested by the scale insect Marchalina hellenica (Genn.) in Greece. In: Sniezko, Richard A.; Yanchuk, Alvin D.; Kliejunas, John T.; Palmieri, Katharine M.; Alexander, Janice M.; Frankel, Susan J., tech. coords. Proceedings of the fourth international workshop on the genetics of host-parasite interactions in forestry: Disease and insect resistance in forest trees. Gen. Tech. Rep. PSW-GTR-240. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture. pp. 304-308.

 


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