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Journal of Experimental Botany, Vol. 51, No. 351, pp. 1679-1686, October 2000
© 2000 Oxford University Press


Original Papers

Imaging spatial and cellular characteristics of low temperature calcium signature after cold acclimation in Arabidopsis

Heather Knight1 and Marc R. Knight

Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, UK

Cooling-induced ‘calcium signatures’ were imaged in aequorin-expressing Arabidopsis plants after cold acclimation or growth at ambient temperature. In all tissues, signatures were altered after acclimation. Characterization of the components generating this response indicates that cold acclimation increases cold-induced vacuolar Ca2+ release, but does not affect the influx of extracellular calcium.

Key words: Calcium signature, cold acclimation, aequorin, vacuole, Arabidopsis.


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