Matt Damon grew potatoes on Mars in the movies but what really would happen under simulated conditions on Earth? Well somebody tried. 65 varieties with 4 successes may not be a great ratio but a Super Potato has apparently emerged from the experiment. http://www.metronews.ca/news/world/2017/03/30/in-lab-simulating-harsh-mars-climate-a-nascent-potato-grows.html
I'm no expert but perhaps that tells us something about panspermia theory or even evolution. I mean life would seem to have a better chance of surviving a planet busting, journey through space event thanks to mutation.