Figure 6.

Dependence of cold memory on the cold-primed phenotype. An enhanced freezing resistance (blue line) and a reduced induction of cold responsive genes (e.g. COR15A; red line) in response to a cold-triggering stimulus indicate cold memory in primed plants (left). Right: After the freezing resistance had reached the original level the priming effect disappeared and a triggering stimulus induces a cold response similar as in naïve plants. Dotted black lines indicate the unstressed state or level of enhanced priming response.