That's a 'phototropism' IIRC and it's not caused by electrical signals but instead by growth hormones called auxins. This is what little I recall from high sch

That's a 'phototropism' IIRC and it's not caused by electrical signals but instead by growth hormones called auxins. This is what little I recall from high school biology, anyways. IIRC the auxins inhibit cell division and different ones cause different tropism phenomena.