Plant growth response to a mechanical stimulation such as rubbing, wind, raindrops, etc. The termed was first coined by M. Jaffee. Seismomorphogenesis is specifically the response to shaking. In essence, they are shorter and fatter. Four or five genes are activated, one of which is the gene for calmodulin.
Leaves fold upon touch, or being burned or otherwise stimulated.
This response is very rapid, the plant responds within a second or two. In addition, the stimulus can be transmitted to other parts of the plant. It may travel via the phloem. Chemical factor - it is clear that one is released to move from one leaflet to another. The substance must pass through vascular system.