Effect of hyperbaric pressure on plants???

[Sarah Cook]

Hi! I'm a high school student looking for a science project idea. I am 
interested in the effect of hyperbaric pressure on plant growth and repair.
I am aware that hyperbaric chambers are used to speed up recovery from 
injuries in humans (i.e. sports injuries). Does anyone hnow about the
 effects on plants? Is there any way I could create a hyperbaric chamber 
in which to test this idea? Please help!

Sarah