Capillary action (wicking) within confined dimensions is not driven by air pressure.
Is there a gravity-negating model for that?
I would have pondered on a cell driven by osmosis at one end with evaporation and/or chemical reaction (photosynthesis) at the other.
But what I would like to see is a physical/mathematical demonstrable model that draws/pumps water 100 feet or more vertically against gravity.
How do chemical substances travel down from the leaf interface to the roots--as in peanuts and potatoes and beets and jicama--while water and other surface-tension-modifying compounds travel up?
Overall, is "life" in plants only phenomenological to the human mind, or is there a clear understanding how organics are formed from elements and their compounds? It is not clear to me how water gets from the roots of a sequoia to the topmost leaf/needle to keep it alive.
Hidden in this rather aimless musing is the underlying fact that without the plant life and processes, there would be no animal life either. The Bible says that at the time of the consummation of Creation, all "moving things" = animals were herbivores. Eating each other came later.