Send to

Choose Destination
Plant J. 1999 Oct;20(2):135-142.

Cross-talk between wound signalling pathways determines local versus systemic gene expression in Arabidopsis thaliana.


Plants react to mechanical damage by activating a set of genes, the products of which are thought to serve defensive functions. In solanaceous plants, cell wall-derived oligosaccharides and the plant hormones jasmonic acid and ethylene participate in the signalling network for wound-induced expression of proteinase inhibitors and other defence-related genes, both in the locally damaged and in the systemic non-damaged leaves. Here we show that in Arabidopsis thaliana, these signalling components interact in novel ways to activate distinct responses. In damaged tissues, oligosaccharides induce the expression of a specific set of wound-responsive genes while repressing jasmonic acid-responsive genes that are activated in the systemic tissues. The oligosaccharide-mediated repression of the jasmonic acid-dependent signalling pathway is exerted through the production and perception of ethylene in the locally damaged tissue. This cross-talk between separate wound signalling pathways thus allows the set up of different responses in the damaged and the systemic tissues of plants reacting to injury.

Free full text

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center