Figure 2.

Plant event in responses to T. urticae infestation. Specific plant receptors (PRRs) recognize elicitors/effectors (HAMPs) derived from either the plant or the spider mite that induce alterations in the membrane potential (Vm), cytosolic Ca²⁺ influxes and ROS/RNS burst. Ca²⁺-sensing proteins, MPKs and phosphatases (APC21) participate in the defense transduction pathway. H₂O₂ content is highly regulated by ROS-related enzymes (BB22, AO, GSTU and CPX7). Besides, genes such as MATI, PP2A5 and others still unknown participate in the tight regulation of the hormonal crosstalk, mainly in the Jasmonic Acid/Salicylic Acid balance. All together plus some transcription factors (ABI4 and other unknown TFs) regulate the induction of the synthesis of a battery of defense molecules. Unknown genes, molecules, pathways and responses are indicated in red.