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Related Experiment Videos

Precipitation affects plant communication and defense.

Enrico Pezzola1, Stefano Mancuso1, Richard Karban2

  • 1LINV - Department of Agri-Food Production and Environmental Science, University of Florence, Viale delle Idee, 30, I-50019, Sesto Fiorentino, Florence, Italy.

Ecology
|April 5, 2017
PubMed
Summary

Sagebrush plants show reduced herbivore damage when water is available or when they detect neighbor distress signals. Optimal defense occurs in wetter, hotter seasons, indicating environmental factors influence plant anti-herbivore strategies.

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Area of Science:

  • Plant ecology
  • Chemical ecology
  • Plant-insect interactions

Background:

  • Plant anti-herbivore defense exhibits significant variability.
  • Plastic defense responses allow plants to allocate resources efficiently based on risk.
  • Plants may use volatile cues from neighbors to assess herbivore attack risk.

Purpose of the Study:

  • To investigate the impact of water availability on sagebrush resistance induced by volatile cues.
  • To determine if environmental conditions modulate plant defense strategies.

Main Methods:

  • Experimental manipulation of water availability and exposure to volatile cues in sagebrush.
  • Inferential analysis of historical herbivore damage data correlated with climate variables.
Keywords:
Artemisia tridentatacommunicationeavesdroppingherbivoryprecipitationvolatileswater availability

Related Experiment Videos

Main Results:

  • Sagebrush plants with increased water or exposed to neighbor volatile cues experienced less herbivore damage.
  • No interaction was observed between water availability and volatile cue effects.
  • Historical data confirmed that sagebrush exhibited better defense during wetter and hotter seasons.

Conclusions:

  • Water availability is a key factor influencing sagebrush resistance to herbivory and sensitivity to damage cues.
  • Environmental conditions, particularly water, directly impact the efficacy and cost-benefit balance of plant defense mechanisms.