So....should we start cultivating varieties of fruits and vegetables in advance that  better adapted to growing in Martian soil for when we want fullscale agriculture there? If so, what sort of things should we be looking for? Are there examples from these volcanic regions?,(reply>), Great question! I stumbled across the idea of genetically modifying crops to better handle the conditions we'd be able to create for them on the Martian surface. Those papers were talking about just using standard crops but tweaking them to help them perform. I'd be interested to see what edible plants grow best in those volcanic regions too!