Sir David Attenborough

The idea that the pollen 'jumps' from flower to bee is cute. Note that when a positively charged bee visits a negatively charged flower and the electric field is neutralised or reduced, the flower doesn't "send a signal;" it's merely that the electric field is neutralised or reduced, which a bee may be able to detect.  Does the lack of negative field from a flower affect bee behaviour? Is the electric field effect strong enough to draw (as in attract) bees to flowers. Odd that Sir D talks about pollen transfer being affected by the electric field, and concludes that the reduced electric field after a bee's visit is a signal about nectar.