Fig. 3. A functional actin cytoskeleton is required to maintain the BIA and associated movements. Effects of (A) 5.0 µM cytochalasin D and (B) 2.0 µM Jasplakinolide on BFA (3.6 µM)-treated L. longiflorum pollen tubes labeled with FM4-64. Times are in seconds. Bars, 15 µm.