You didn’t tell us what kind of water you used. Tap water contains dissolved minerals which most probably are not available on mars. Rainwater contains dissolved CO2 which is most definitely available on Mars. Better would be to grow them in pure carbon dioxide atmosphere at progressively lower pressures to see how that went. In fact we could be breeding bacteria and fungus and plants to survive in pure CO2 at around 600 Pa so we can grow crops outside when we arrive.