Fig. 7
From: Survivability and life support in sealed mini-ecosystems with simulated planetary soils

Germination experiments of plants in exoplanetary simulated soils and importance of microbial presence. (a) Germination rate comparison between plants in exoplanetary simulated soils with similar components, with and without introduced microbes. (b) Plant cultivation experiments under conditions resembling lunar soil, using Fly ash and Clinker ash. (c) Plant growth in a sealed environment without sterilizing the microbes. (d) Plant growth in a sealed environment post microbial sterilization.