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Plant communication: Sagebrush engage in self-recognition and warn of danger
Date:6/19/2009

n neighbors, but not air contact, failed to show this response.

"We explored self-recognition in the context of plant resistance to herbivory ," he said. "Previously we found that sagebrush (Artemisa tridentata) became more resistant to herbivores after exposure to volatile cues from experimentally damaged neighbors."

The ecologists wrote that "naturally occurring herbivores caused similar responses as experimental clipping with scissors and active cues were released for up to three days following clipping. Choice and no-choice experiments indicated that herbivores responded to changes in plant characteristics and were not being repelled directly by airborne cues released by clipped individuals."

In earlier research, Karban found that "volatile cues are required for communication among branches within an individual sagebrush plant. This observation suggests that communication between individuals may be a by-product of a volatile communication system that allows plants to integrate their own systemic physiological processes."

The scientists made cuttings from 30 sagebrush plants at the UC Sagehen Creek Natural Reserve and then grew the cutting in plastic pots. They grew the cuttings at UC Davis and then placed the pots near the parent plant or near another different assay plant (control group) in the field.


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Contact: Kathy KeatleyGarvey
kegarvey@ucdavis.edu
530-754-6894
University of California - Davis
Source:Eurekalert  

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