Pollen Tube Growth and the Intracellular Cytosolic Calcium Gradient Oscillate in Phase while Extracellular Calcium Influx Is Delayed

Abstract
Ratio images of cytosolic ${\rm Ca}^{2+}\ ({\rm Ca}^{2+}{}_{{\rm i}})$ in growing, fura-2-dextran-loaded Lilium longiflorum pollen tubes taken at 3- to 5-sec in...