J Integr Plant Biol. ›› 2019, Vol. 61 ›› Issue (8): 924-928.DOI: 10.1111/jipb.12725

• Letter to the Editor • Previous Articles     Next Articles

The circadian clock contributes to diurnal patterns of plant indirect defense in nature

Youngsung Joo1†, Jay K. Goldberg1‡, Lucille Chrétien1,2,§,¶, Sang-Gyu Kim1, Ian T. Baldwinand Meredith C. Schuman1*,††   

  1. 1Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Kn€oll-Straße 8, D-07745 Jena, Germany
    2Department of Biology, Ecole Normale Superieure de Lyon (ENS L), 46 Allee d’Italie, 69007 Lyon, France

    Present address: Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Yuseong-gu, Daejeon 34141, South Korea
    Present address: Department of Biology, Indiana University, Bloomington, IN, USA
    §Present address: Institut de Recherche sur la Biologie de l’Insecte (IRBI), UMR 7261, CNRS/Université FranBois-Rabelais de Tours, Avenue Monge, Parc Grandmont, 37200 Tours, France
    Present address: Laboratory of Entomology (WUR), Wageningen University and Research Centre, Droevendaalsesteeg 1, Building 107/ Wo.Aa.081, 6708PB Wageningen, The Netherlands
    ††Present address: Department of Geography, University of Zurich, Winterthurerstrasse 190, 8057 Zurich
    Email: Meredith C. Schuman (mschuman@ice.mpg.de)
  • Received:2018-07-01 Accepted:2018-09-21 Online:2018-09-25 Published:2019-08-01


The plant circadian clock regulates the rhythms of plant metabolism. Many herbivore‐induced plant volatiles (HIPVs) fluctuate, diurnally, but the role of the circadian clock in the emission of HIPVs and their ecological consequences remains largely unknown. Here, we show that the timing of herbivore attack can alter the outcome of tri‐trophic interactions, and this is mediated by the circadian clock, under both field and glasshouse conditions. Although most HIPV emissions did not have a circadian rhythm, the circadian clock modulated HIPV emissions in a time‐dependent manner. HIPVs mediate tri‐trophic interactions, and the circadian clock may affect these interactions by modulating HIPV emission in nature.

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