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Abstract Detail


Phytochemical Section

Andrew, Rose L. [1], Keszei, Andras [2], Foley, William J. [2].

Terpene chemotypes and sideroxylonal in Eucalyptus: interactions between disparate chemical pathways.

Volatile and non-volatile leaf secondary chemicals interact to deter mammalian and insect herbivores of Eucalyptus. But what processes cause the commonly observed correlation of terpene concentrations with those of formylated phloroglucinol compounds (FPCs), which are appear to be biosynthetically unrelated? We are investigating this question in a species containing a single FPC, sideroxylonal, and a broad suite of mono- and sesqui-terpenes. Terpene profiles display both discontinuous, chemotype-style variation and quantitative genetic variation within chemotypes. FPCs are not only genetically correlated with various terpenes, but are also affected by chemotypes independently of individual terpene concentrations. These results illustrate the strong connection between FPCs and terpenes and highlight the implications of epistasis and pleiotropy for phytochemical evolution.


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1 - University of British Columbia, Botany, 6270 University Blvd, Vancouver, BC, V6T 1Z4, Canada
2 - The Australian National University, School of Botany and Zoology, 116 Daley Rd, Canberra, ACT, 0200, Australia

Keywords:
formylated phloroglucinol compound (FPC)
terpene
chemotype
plant-herbivore interactions.

Presentation Type: Oral Paper:Papers for Sections
Session: 57
Location: 211/SUB
Date: Wednesday, July 30th, 2008
Time: 9:30 AM
Number: 57005
Abstract ID:892


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