Almost all people would agree that's not the same thing as the subjective experience of pain, though. By that measure a smoke detector is actually screaming when it's power is interrupted.

Plants don't have organs for movement or information processing, because those are too energy intensive and wouldn't help much. Their other tissues respond to stimuli, but the data rate is orders of magnitude slower than an animal in the same environment.

I'm not sure why these signals would need to reach any significant complexity, but if they did it would be a truly alien mind that expands with the plant's growth about as fast as it thinks. And it's kind of beside the point. Stealing from !Teppichbrand@feddit.org:

Plants have feelings too
No, they do not. There is no serious study to suggest that they do. Plants do not have a brain or central nervous system. At most, they respond to stimuli. If you really care that much about the welfare of plants, you should go vegan, since many more plants "die" for animal feeding. Do you feel bad while mowing your lawn? And would you rather rescue a potted plant than a dog from a burning house? Is docking pig tails the same as branch trimming to you? Question upon question...

Come on, you can do better.

On the wikipedia page you linked, there is exactly zero occurrence of the word "pain".
The only part that could remotely be linked to your previous argument does not indicate pain at all.

The GLVs responsible for the smell of freshly cut grass play a role in plant communication and plant defence against herbivory, functioning as a distress signal warning other plants of imminent danger and, in some instances, as a way to attract predators of grass-eating insects.

This paragraph is a less sensational and more serious reformulation of the source material, an opinion piece stating the following without a single scientific reference

Trauma, that’s what. It’s the smell of chemical defenses and first aid. The fresh, “green” scent of a just-mowed lawn is the lawn trying to save itself from the injury you just inflicted.

This piece was posted in May 2012 on mentalfloss.com, so not really a scientific study.

Also, nothing in there speaks of the brocoli, which you first referred to.

Edit: spelling, formatting

Ah so stepping on kittens is the same thing as stepping on grass. Great logic…