How can a plant feel pain without a nervous system?

Answer:

Answer

• Plant Brain: Each root apex harbours a unit of nervous system of plants. The number of root apices in the plant body is high and all brain-units are interconnected via vascular strands (plant nerves) with their polarly-transported auxin (plant neurotransmitter), to form a serial (parallel) nervous system of plants. The computational and informational capacity of this nervous system based on interconnected parallel units is predicted to be higher than that of the diffuse nervous system of lower animals, or the central nervous system of higher animals/humans.

Taken from the study at: http://ds9.botanik.uni-bonn.de/zellbio/AG-Baluska-Volkmann/plantneuro/neuroview.php