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Arabidopsis thaliana
Calcium signaling in Arabidopsis is a calcium mediated signalling pathway that Arabidopsis plants use in order to respond to a stimuli. In this pathway, Ca2+ works as a long range communication ion, allowing for rapid communication throughout the plant. Systemic changes in metabolites such as glucose and sucrose takes a few minutes after the stimulus, but gene transcription occurs within seconds.[1] Because hormones, peptides and RNA travel through the vascular system at lower speeds than the plants response to wounds, indicates that Ca2+ must be involved in the rapid signal propagation.[1] Instead of local communication to nearby cells and tissues, Ca2+ uses mass flow within the vascular system to help with rapid transport throughout the plant. Ca2+ moving through the xylem and phloem acts through a “calcium signature” receptor system in cells where they integrate the signal and respond with the activation of defense genes.[2] These calcium signatures encode information about the stimulus allowing the response of the plant to cater towards the type of stimulus.
^ abJohns S, Hagihara T, Toyota M, Gilroy S (April 2021). "The fast and the furious: rapid long-range signaling in plants". Plant Physiology. 185 (3): 694–706. doi:10.1093/plphys/kiaa098. PMC 8133610. PMID 33793939.
^Savatin DV, Gramegna G, Modesti V, Cervone F (2014). "Wounding in the plant tissue: the defense of a dangerous passage". Frontiers in Plant Science. 5: 470. doi:10.3389/fpls.2014.00470. PMC 4165286. PMID 25278948.
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