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Plant and Cell Physiology Advance Access published online on February 25, 2009
Plant and Cell Physiology, doi:10.1093/pcp/pcp030
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© The Author 2009. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

Chemical and molecular ecology of herbivore-induced plant volatiles: proximate factors and their ultimate functions

Gen-ichiro Arimura1,2, Kenji Matsui3 and Junji Takabayashi1

1Center for Ecological Research, Kyoto University, Otsu 520-2113, Japan
2Global COE Program: Evolution and Biodiversity, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
3Department of Biological Chemistry, Faculty of Agriculture, and Department of Applied Molecular Bioscience, Graduate School of Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan

Author for correspondence: Dr. Gen-ichiro Arimura. Tel: +81 77 549 8258, Fax +81 77 549 8201, Email: garimura{at}ecology.kyoto-u.ac.jp


  Abstract

In response to herbivory, plants emit specific blends of herbivore-induced plant volatiles (HIPVs). HIPVs mediate sizable arrays of interactions between plants and arthropods, microorganisms, undamaged neighboring plants or undamaged sites within the plant in various ecosystems. HIPV profiles vary according to the plant and herbivore species, and the developmental stages and conditions of the live plants and herbivores. To understand the regulatory mechanisms underling HIPV biosynthesis, the following issues are reviewed here: I) herbivore-induced formation of plant volatile terpenoids and green leaf volatiles, II) initial activation of plant responses by feeding herbivores, III) the downstream network of the signal transduction. To understand the ecological significance of HIPVs, we also review case studies of insect-plant and inter/intraplant interactions mediated by HIPVs that have been documented in the field and laboratory in recent years.

Keywords: insect oral factors - green leaf volatiles (GLVs) - herbivore-induced plant volatiles (HIPVs) - indirect defense - terpenoids (terpenes)

(Received January 13, 2009; Accepted February 16, 2009)
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