Title: Interspecific comparison of constitutive ash phloem phenolic chemistry reveals compounds unique to Manchurian ash, a species resistant to emerald ash borer
Author: Whitehill, Justin G.A.; Opiyo, Stephen O.; Koch, Jennifer L.; Herms, Daniel A.; Cipollini, Donald F.; Bonello, Pierluigi.
Source: Journal of Chemical Ecology. 38: 499-511.
Description: The emerald ash borer (Agrilus planipennis, EAB) is an invasive wood-borer indigenous to Asia and is responsible for widespread ash (Fraxinus spp.) mortality in the U.S. and Canada. Resistance and susceptibility to EAB varies among Fraxinus spp., which is a result of their co-evolutionary history with the pest. We characterized constitutive phenolic profiles and lignin levels in the phloem of green, white, black, blue, European, and Manchurian ash. Phloem was sampled twice during the growing season, coinciding with phenology of early and late instar EAB. We identified 66 metabolites that displayed a pattern of variation, which corresponded strongly with phylogeny. Previously identified lignans and lignan derivatives were confirmed to be unique to Manchurian ash, and may contribute to its high level of resistance to EAB. Other compounds that had been considered unique to Manchurian ash, including hydroxycoumarins and the phenylethanoids calceolarioside A and B, were detected in closely related, but susceptible species, and thus are unlikely to contribute to EAB resistance of Manchurian ash. The distinct phenolic profile of blue ash may contribute to its relatively high resistance to EAB.
Keywords: Agrilus planipennis, Fraxinus, wood-borer, HPLC, host plant resistance, plant-insect interactions, invasive species, emerald ash borer, Coleoptera, Buprestidae
View or Print this Publication (372 KB)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
Whitehill, Justin G.A.; Opiyo, Stephen O.; Koch, Jennifer L.; Herms, Daniel A.; Cipollini, Donald F.; Bonello, Pierluigi. 2012. Interspecific comparison of constitutive ash phloem phenolic chemistry reveals compounds unique to Manchurian ash, a species resistant to emerald ash borer. Journal of Chemical Ecology. 38: 499-511.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility