* in the movie and the book, The Martian, the lead grew potatoes on Mars using extra oxygen in an enclosed greenhouse and he used soil enriched with human feces. In these experiments they mimicked direct Martian atmosphere. The soil would need to be a loose structure with nutrients added
* CIP brought Mars analog soil from the Pampas de La Joya desert in Southern Peru to its experimental station in La Molina, Lima. There CIP was able to show proof that potatoes could grow in this dry, salty soil with some help from fertilized Earth soil for both nutrition and structure.
The Potatoes on Mars project was conceived by CIP to both understand how potatoes might grow in Mars conditions and also see how they survive in the extreme conditions similar to what parts of the world already suffering from climate change and weather shocks are already experiencing.
“Growing crops under Mars-like conditions is an important phase of this experiment,” says Julio Valdivia-Silva, a research associate with the SETI Institute who has worked at NASA’s Ames Research Center (NASA ARC) and now works at UTEC in Lima. “If the crops can tolerate the extreme conditions that we are exposing them to in our CubeSat, they have a good chance to grow on Mars. We will do several rounds of experiments to find out which potato varieties do best. “We want to know what the minimum conditions are that a potato needs to survive,” he said.
The CubeSat houses a container holding soil and the tuber. Inside this hermetically sealed environment the CubeSat delivers nutrient rich water, controls the temperature for Mars day and night conditions and mimics Mars air pressure, oxygen and carbon dioxide levels. Sensors constantly monitor these conditions and live streaming cameras record the soil in anticipation of the potato sprouting.
From the initial experiment, CIP scientists concluded that future Mars missions that hope to grow potatoes will have to prepare soil with a loose structure and nutrients to allow the tubers to obtain enough air and water to allow it to tuberize.
“It was a pleasant surprise to see that potatoes we’ve bred to tolerate abiotic stress were able to produce tubers in this soil,” Amoros said. He added that one of the best performing varieties was very salt-tolerant from the CIP breeding program for adaptation to subtropical lowlands with tolerance to abiotic stress that was also recently released as a variety in Bangladesh for cultivation in coastal areas with high soil salinity.
Amoros noted that whatever their implications for Mars missions, the experiments have already provided good news about potato’s potential for helping people survive in extreme environments on Earth.
“The results indicate that our efforts to breed varieties with high potential for strengthening food security in areas that are affected, or will be affected by climate change, are working,” he said.