Cress Seeds Grown in Moon Dust Raise Hopes for Lunar Crops

The prospect of growing crops on the moon has edged a little closer after researchers nurtured plants — some more successfully than others — in lunar soil for the first time. From a report: Scientists planted thale cress seeds in moon dust brought back by three Apollo missions and watched them sprout and grow into fully fledged plants, raising the potential for astronauts to farm off-world crops. But while the plants survived in the lunar soil, or regolith, they fell short of thriving, growing more slowly than cress planted in volcanic ash, developing stunted roots, and showing clear signs of physiological stress.

“We found that plants do indeed grow in lunar regolith, however they respond as if they are growing in a stressful situation,” said Dr Anna-Lisa Paul, a molecular biologist at the University of Florida. Thale cress, or Arabidopsis thaliana, is a small flowering plant related to broccoli, cauliflower and kale. “It’s not especially tasty,” Paul added. The experiments are the first to investigate whether plants can grow in lunar soil and follow an 11-year effort to obtain the rare material. Because the soil is so precious, Nasa loaned only 12g of it — a few teaspoons — to the researchers who conducted the tests. Scientists have long wondered whether the moon could support crops, but with space agencies now planning to return humans to the surface, and potentially build lunar settlements for visitors, the question has become more pressing.