Ca2+ oscillations in plant cells: initiation by rapid elevation in cytosolic free Ca2+ levels

Biochemical and Biophysical Research Communications
G M CalderB K Drøbak

Abstract

Temporal increases in intracellular [Ca2+] are now recognized to be key triggers for a wide range of important physiological events in eukaryotic cells. In mammalian cells, signal-induced Ca2+-elevations have been found to be of a pulsatile nature and Ca2+ spikes display a high degree of spatiotemporal complexity. In plant cells a similar picture is beginning to emerge. To investigate the occurrence of pulsatile Ca2+ signals in plant cells we studied alterations of [Ca2+] in the tip region of pollen tubes from poppy (Papaver rhoeas). Time-Resolved Laser Scanning Confocal Microscopy of pollen tubes microinjected with the Dextran-linked Ca2+-indicator dyes Calcium Green or Indo-1 revealed that highly regular Ca2+ oscillations occur in these cells. We further demonstrate that artificial elevation of cytosolic Ca2+ by photolysis of caged-Ca2+ (Nitr-5) can trigger the onset of oscillations.

References

Dec 1, 1995·Cell·M D Bootman, M J Berridge
Aug 1, 1995·The Plant Cell·M. R. McAinshA. M. Hetherington

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Citations

Nov 15, 2000·Proceedings of the National Academy of Sciences of the United States of America·S A WalkerJ A Downie
Oct 14, 2014·Frontiers in Plant Science·Andrea BleckmannThomas Dresselhaus
Aug 25, 2000·The Journal of Biological Chemistry·F SafadiA S Reddy
Sep 30, 1999·Microscopy Research and Technique·S A Stricker, M Whitaker
Mar 12, 2021·Plant Science : an International Journal of Experimental Plant Biology·Chuanbao WuWei Li
Oct 13, 2001·Current Opinion in Plant Biology·N H EvansA M Hetherington
Oct 13, 2006·Biophysical Chemistry·C SardetA McDougall

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