mutation efficiency of space mutagenesis is higher than that of receiving gamma rays in the earth laboratory. In space, the intensity of cosmic rays is much lower, and the exposure time of seeds to radiation is longer. Much longer. The linear energy transfer and overall biological effects of what we call particles are higher in space than in the laboratory, and the damage rate to seeds is much lower.”
Liu Luxiang said that in the radiator of the earth laboratory, the seeds phone database will receive high doses of ionizing radiation of 50 to 400 gray (gray, the absorbed dose of ionizing radiation) in a few seconds. But during a much longer week of space travel, the seeds received a measly 2 milligrays of radiation (a milligray is one-thousandth of a gray). The result, he added, was that up to 50 percent of the seeds would not survive in over-radiated ground-based labs, but the seeds that traveled back to Earth would almost germinate and grow. Liu Luxiang said, "Both techniques are useful and can help us solve some very real problems. And the chances of sending seeds to space are very slim.
So we can't rely on space mutagenesis technology alone." Now, the rest of the world appears to have renewed interest in growing crops in space. In November 2020, NanoRacks, a US commercial space services company, announced plans to establish a space greenhouse cultivation in orbit around the Earth. The goal of the plan? Develop new crop varieties better suited to feed all of humanity as the world faces a worsening climate change crisis. NanoRacks, a company known for launching small satellites from the International Space Station, has a space greenhouse program in partnership with the United Arab Emirates. The UAE is a country with very little arable land and needs to import a lot of food.