Quote:
Originally Posted by Who are you?
Plants react to attacks and destruction of their bodies. They will have more stress hormones in their bodies, they will increase defenses and they will release pheromone-like substances to warn other plants nearby of what is happening. All very much like pain and screaming in humans and animals.
So if you're vegetarian because of conscience, you might want to consider skipping on plants as well 
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hormones promote/instigate and chemical responses physical responses but arent indicative of a brain, central nervous system to perceive pain or another form of consciousness ,sentience or self awareness .
mutation that allows signalling to other plants with the same genetic material is beneficial from an evolutionary standpoint but i dont see any reason to believe a plant is conscious of anything.
your points are very interesting however, all these complex mechanisms in plants are fascinating.