Seeds dehydrated and dried

Dr. Chen Hongying, Germplasm Resource Library, Kunming Institute of Botany, Chinese Academy of Sciences, in collaboration with experts from the Millennium Seed Bank of the Kew Gardens of the Royal Botanic Gardens in the UK, from 2007 to 2010, dehydrated the tea seeds distributed in the three collection sites of Kunming, Linyi and Puer. A comparative study of drying and cryopreservation showed that tea seeds from three different locations exhibited different dehydration tolerance. Kunming's tea seeds have the strongest tolerance and can be dehydrated to 8% moisture content, followed by tea seeds from Pu'er and Linyi. This difference is related to the habitat and intraspecific variation of the collection site. After treatment with 0.5M and 1M hydrogen peroxide (H2O2), the germination rate of the seeds after the drying treatment can be improved.

The results of the above seed dehydration experiments and the three habitats collected (such as the months during which the seeds matured during the dry season) and the seed coat and seed weights indicated that the tea seeds from these three sites were not stubborn (dehydration). Sensitive) seeds. Although the tea seeds collected in Kunming were more resistant to dehydration, they all died completely after cryopreservation at -20 degrees for one month. The reasons for this need further study.

For the first time, this study compared different varieties of tea seeds collected in different places, and analyzed and compared the dehydration tolerance of tea seeds. The research results were published in Plant Science (184: 36-44), a leading journal of botanical research in 2012.

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