Space-Grown Seeds: China’s Idesia Polycarpa Plants Thrive in Yunnan
China’s first batch of Idesia polycarpa tree seeds, sent into space by the Shenzhou-16 manned spacecraft, have successfully sprouted and begun their growth in Yunnan Province, southwest China. This achievement marks a significant milestone in China’s ongoing efforts to enhance agricultural and forestry practices through space breeding.
From Space to Earth: The Journey of Idesia Polycarpa Seeds
The seeds were launched into space in 2023 and returned to Earth after their journey. They were then transported to a space breeding demonstration site in Xuanwei City, Yunnan, which was established in April 2024. This site serves as the base for cultivating these space-exposed seeds, with researchers aiming to explore the potential benefits of space breeding.
Idesia polycarpa, a tree species native to China, is valued for its adaptability, rapid growth, high yield, and high oil content. These characteristics make it an important woody oil tree in China’s agricultural landscape.
The Breeding Process: Nurturing Space-Exposed Seeds
Upon their return, the seeds underwent a meticulous breeding process to ensure their successful germination and growth. Zeng Meiling, a researcher at the breeding base, detailed the steps involved: “These are the Idesia polycarpa seeds returned with the Shenzhou-16 manned spacecraft. We first sterilised them and then put them into a culture medium for breeding. In the next step, we moved them into a plant incubator with appropriate temperature, humidity, and illumination, so that they would break dormancy. This process usually lasts about 10 days. The seeds that sprouted were put into culture mediums in an effort to boost their growth.”
Once the seeds had germinated, the young saplings were transferred from the laboratory to greenhouses, where they will continue to grow under controlled conditions. Eventually, the saplings will be replanted in fields when they reach the appropriate size, allowing them to grow in natural environments.
Future Prospects: Expanding the Use of Idesia Polycarpa
The early results of this space breeding initiative are promising. Wang Fang, another researcher involved in the project, reported that the plants are growing well: “So far, they have been growing healthily. The leaves are extensive, and the plants are strong. When they are about 40 or 50 centimetres high, and the diameter of their stem reaches about one centimetre, they can be replanted into soil.”
Wang also explained the long-term goals of the project: “After about three to four years, some of the female plants will begin to bear fruit. Then we will choose those that have high oil content and high resilience, for example, to drought and cold, as the parental generation for asexual reproduction. The seedlings produced will then be popularised so that more farmers can use them.”
This space breeding project is a significant step towards enhancing the quality and resilience of agricultural products in China. By leveraging the unique conditions of space, researchers hope to develop plants with superior traits, contributing to greater agricultural productivity and sustainability.
