|MadSci Network: Botany|
There is no credible evidence that plants have any pain notification system. I have seen several attempts to demonstrate the presence of a nerve system capable of expressing pain, and it just is not there. I believe pain is part of the normal operation of life.
Some plants demonstrate the ability to respond to touch, or the presence of insects, so that would indicate a very primitive communication system. If you are a young person looking for profession, consider Botany or Agronomy and work to prove or disprove the presence of a nerve system in plants We always need scientists.
[Moderator's Note: We have several answers in our archives that discuss issues of inter- and intra-plant communication and responses to the environment via hormones, pheromones, and various trophisms. For example, take a look at these answers 1007583241.Bt, 921961330.Bt, 954645304.Bt, 986445627.Bt, 1166234582.Bt, 949413731.Bt, 887211984.Ag, 917363026.Bt, and 1010453257.Bt. -- SM]
Try the links in the MadSci Library for more information on Botany.