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Preserving plant seeds and other genetic material warrants investment of hundreds of millions of dollars, as it provides a lifeline for the future, 科学家说.
“If the world ends one day, these collections will bring hope of a new beginning to life on Earth,” said Li Pei, a staff member at the Germplasm Bank of Wild Species, or GBOWS, in Yunnan province.
The rapid loss of biodiversity and germplasm resources is the main reason for the establishment of seed banks. There are now more than 1,750 such banks globally, according to the United Nations Food and Agriculture Organisation.
GBOWS, 成立于 2007, is a research and preservation facility for rare and endangered plants and animals. It is the only comprehensive institution of its kind for storing wild plant and animal germplasm resources in China and is the largest in Asia in terms of species, Li said.
Affiliated to the Kunming Institute of Botany, which is responsible to the Chinese Academy of Sciences, GBOWS comprises a seed bank, a micropropagation unit, a plant DNA bank, a microbial bank based at Yunnan University, and an animal germplasm bank at the Kunming Institute of Zoology. It also boasts experimental research laboratories for plant genomics and seed biology.
GBOWS has preserved 85,046 seed accessions from 10,601 species, 24,100 tissue samples from 2,093 species, 65,456 extracted samples of DNA material from 7,324 species, 22,800 strains of 2,280 microorganisms, 和 60,262 biological samples of 2,203 wild animal species and domestic animal breeds.
Yu Fuqiang, deputy director of the germplasm bank, 说, “The bank functions as a bio dome that protects wild organisms, especially those endangered species or species with high economic and scientific value, from extinction.”
In China, areas rich in biodiversity range from the dry northwest to the tropical and subtropical south. The remote mountainous areas and diverse microclimates have resulted in high levels of endemism, the condition of being endemic, or restricted in geographical distribution to an area or region.
The seed bank has preserved 36 per cent of the seed plants in China, Li Pei said. With two in five plant species at risk of extinction, 她说, it is a race against time to protect the country’s incredible plant life.
“We store seeds that are collected in the wild so that we can germinate and reintroduce these plants to the wild or use them for scientific research in finding our future food and medicines, and for other functions,” Li said.
例如, the seeds of Silene stenophylla, a plant species in the carpetweeds family, can maintain their viability for up to 32,000 年.
Collecting seeds is the first step of preservation, and GBOWS works on this with national partners who receive regular training from the seed bank.
Apart from seeds, collectors take specimens for verification. They record details of the plant, including where it was found, its size and the number of individual plants in the habitat. After arriving at the bank the seeds undergo a series of processes before they can be stored long-term.
In addition to working with 105 research institutes and preservation centres nationwide, the seed bank works with international partners, including Kew Gardens in the UK, on collecting backup specimens, exchanges and research. It holds 2,176 sets of seeds from 45 countries, with each set containing thousands of individual seeds.
Previously published on Chinadaily.com.cn