[nanomonkey]

Tree's are made of fairly well insulated materials and contain a vast amount of chemical reactions going on, they are also elevated from the ground, so they can experience the tribolectric effect (transfer of electrons through friction), as well as ionic charge due to moving nutrients up through their cambium. It's really not hard to imagine how they could become electrically charged at their extremities.

[jojobas]

Someone measured tree branch tip to root resistance and while I don't quite understand the poor quality chart it's in kiloohms. The tree would need to radically change some of its biology. Like no capillaries from roots to branches. I'd say no chance.

https://sci-hub.se/10.1109/EE.1956.6442015