Explaining evolution of plant communication by airborne signals.

  title={Explaining evolution of plant communication by airborne signals.},
  author={Martin Heil and Richard Karban},
  journal={Trends in ecology & evolution},
  volume={25 3},
In spite of initial doubts about the reality of 'talking trees', plant resistance expression mediated by volatile compounds that come from neighboring plants is now well described. Airborne signals usually improve the resistance of the receiver, but without obvious benefits for the emitter, thus making the evolutionary explanation of this phenomenon problematic. Here, we discuss four possible non-exclusive explanations involving the role of volatiles: in direct defense, as within-plant signals… CONTINUE READING
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