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Article Addendum

Elucidation of the genomic basis of indirect plant defense against insects

Joshua S. Yuan, Tobias G. Köllner, Greg Wiggins, Jerome Grant, Nan Zhao, Xiaofeng Zhuang, Jörg Degenhardt and Feng Chen

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Using airborne signals to attract herbivore predators and parasitoids is an important strategy that plants use in defense against herbivorous insects. The volatiles involved in this indirect plant defense are often chemically complex and variable across species. We recently established rice as a model for studying the molecular and genomic basis of volatile-mediated indirect plant defense. Rice plants when damaged by fall armyworm larvae become highly attractive to parasitic wasps. The volatiles potentially responsible for parasitoid attraction were determined to be a blend of compounds predominated by terpenoids, of which S-linalool is the most abundant. Racemic linalool alone was shown to be effective in attracting parasitic wasps. By combining volatile profiling and microarray analysis, a catalog of candidate genes for volatile biosynthesis was identified. Three genes encoding terpene synthases were biochemically characterized. They are responsible for the production of the majority of volatile terpenes released from insect-damaged rice plants. Additional candidate genes are being currently characterized for their role in production of other insect-induced volatiles from rice plants. Identification of a complete set of key genes for synthesizing herbivory-induced volatiles in rice will provide an important reference for comparative study of this important defense trait across a variety of plant species.

Addendum to: Yuan JS, Köllner TG, Wiggins G, Grant J, Degenhardt J, Chen F. Molecular and genomic basis of volatile-mediated indirect defense against insects in rice. Plant J 2008; In press.

Authors

Joshua S. Yuan

Department of Plant Sciences, University of Tennessee, Knoxville, TN 37996, USA

Tobias G. Köllner

Max Planck Institute for Chemical Ecology, Beutenberg Campus, Winzerlaer Strasse 10, D-07745 Jena, Germany

Greg Wiggins

Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN 37996, USA

Jerome Grant

Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN 37996, USA

Nan Zhao

Department of Plant Sciences, University of Tennessee, Knoxville, TN 37996, USA

Xiaofeng Zhuang

Department of Plant Sciences, University of Tennessee, Knoxville, TN 37996, USA

Jörg Degenhardt

Max Planck Institute for Chemical Ecology, Beutenberg Campus, Winzerlaer Strasse 10, D-07745 Jena, Germany

Feng Chen

Department of Plant Sciences, University of Tennessee, Knoxville, TN 37996, USA,

Purchase article for $19

Subscribe to this journal for $79/year