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Herbivory elicits changes in green leaf volatile production via jasmonate signaling and the circadian clock

Cited 20 time in Web of Science Cited 24 time in Scopus

Joo, Youngsung; Schuman, Meredith C.; Goldberg, Jay K.; Wissgott, Antje; Kim, Sang-Gyu; Baldwin, Ian T.

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PLANT CELL AND ENVIRONMENT, Vol.42 No.3, pp.972-982
The timing of plant volatile emissions is important for a robust indirect defense response. Green leaf volatiles (GLVs) are emitted by plants upon damage but can be suppressed by herbivore-associated elicitors, and the abundance and composition of GLVs vary depending on the timing of herbivore attack. We show that the GLV biosynthetic enzyme HYDROPEROXIDE LYASE (HPL) is transcriptionally regulated by the circadian clock in Nicotiana attenuata. In accordance with transcript abundance of NaHPL, GLV aldehyde pools in intact leaves peaked at night and at subjective night under diurnal and continuous light conditions, respectively. Moreover, although the basal abundance of NaHPL transcripts is upregulated by jasmonate (JA) signaling, JA does not regulate the reduction of NaHPL transcript abundance in damaged leaves by simulated herbivore treatment. Unexpectedly, the plant circadian clock was strongly altered when Manduca sexta larvae fed on N. attenuata, and this was also independent of JA signaling. Lastly, the temporal dynamics of NaHPL transcripts and total GLV emissions were strongly altered by M. sexta larval feeding. Our data suggest that the temporal dynamics of emitted GLV blends result from a combination of damage, JA signaling, herbivore-associated elicitors, and the plant circadian clock.
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  • College of Natural Sciences
  • School of Biological Sciences
Research Area Ecology, Evolutionary Biology, Plant Sciences, 생태학, 식물과학, 진화생물학


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