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- W1974046617 abstract "Calcium signatures induced by two elicitors of plant defense reactions, namely cryptogein and oligogalacturonides, were monitored at the subcellular level, using apoaequorin-transformed Nicotiana tabacum var Xanthi cells, in which the apoaequorin calcium sensor was targeted either to cytosol, mitochondria or chloroplasts. Our study showed that both elicitors induced specific Ca2+ signatures in each compartment, with the most striking difference relying on duration. Common properties also emerged from the analysis of Ca2+ signatures: both elicitors induced a biphasic cytosolic [Ca2+] elevation together with a single mitochondrial [Ca2+] elevation concomitant with the first cytosolic [Ca2+] peak. In addition, both elicitors induced a chloroplastic [Ca2+] elevation peaking later in comparison to cytosolic [Ca2+] elevation. In cryptogein-treated cells, pharmacological studies indicated that IP3 should play an important role in Ca2+ signaling contrarily to cADPR or nitric oxide, which have limited or no effect on [Ca2+] variations. Our data also showed that, depending on [Ca2+] fluxes at the plasma membrane, cryptogein triggered a mitochondrial respiration increase and affected excess energy dissipation mechanisms in chloroplasts. Altogether the results indicate that cryptogein profoundly impacted cell functions at many levels, including organelles." @default.
- W1974046617 created "2016-06-24" @default.
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- W1974046617 date "2012-06-01" @default.
- W1974046617 modified "2023-10-12" @default.
- W1974046617 title "Calcium signatures and signaling in cytosol and organelles of tobacco cells induced by plant defense elicitors" @default.
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- W1974046617 doi "https://doi.org/10.1016/j.ceca.2012.02.006" @default.
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