Differential expression of CPKs and cytosolic Ca2+ variation in resistant and susceptible apple cultivars (Malus x domestica) in response to the pathogen Erwinia amylovora and mechanical wounding

摘要

BackgroundPlant calcium (Ca²⁺) signals are involved in a wide array of intracellular signalling pathways following pathogen invasion. Ca²⁺-binding sensory proteins such as Ca²⁺-dependent protein kinases (CPKs) have been predicted to mediate signalling following Ca²⁺ influx after pathogen infection. However, to date this prediction has remained elusive.