The International Seed Testing Association (ISTA) and the International Society for Seed Science (ISSS) are happy to announce a jointly organized series of webinars on fundamental and applied aspects of seeds.
This first webinar will be introduced by ISTA President Steve Jones and ISSS President Henk Hilhorst. The topic for this webinar is seed storage.
Dr Christina Walters Lead Scientist at the National Laboratory for Genetic Resources Preservation at Fort Collins, CO, USA, firstname.lastname@example.org on:
Seed Ageing during Dry Storage: a Discreet, Discrete Problem. Deterioration of dry seeds, which are quiescent, occurs in solidified cytoplasm. This means that damage results from slight movement of molecules that are mostly immobilized in a dense matrix. Damage accumulates with time in a manner reminiscent of time-keeping. Addition of water relaxes the immobilized molecules, activating metabolism and germination – if the accumulated damage is not too severe. Eventually, however, the dry seed succumbs to the accumulated damage and fails to germinate. The discrete transition in a germination assay, from able to unable to germinate, is usually our first indication that ageing has occurred.
Dr Manuela Nagel Head of Cryo and Stress Biologyat Genebank Department, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK Gatersleben), Seeland, Germany, Nagel@ipk-gatersleben.de, on:
Seed conservation – harnessing seed science for the maintenance of genetic diversity in genebanks. Worldwide, about 730 ex situ genebanks conserve more than 5.4 million accessions of plant genetic resources for food and agriculture (WIEWS 2020). Most of the material is stored as orthodox, desiccation-tolerant seed. Seed longevity is determined by several factors such as the genetic background, the growth environment during seed development and the final storage conditions. Since the establishment of genebanks, seed science has played an important role improving quality and extending storability of seeds. Accelerating some key workflows by the application of high-throughput approaches could further support these developments. However, a major challenge is the large genetic diversity present in genebanks. The talk will provide insights into practical genebank procedures in dealing with genetic diversity and discuss recent developments that may further support the conservation of plant genetic resources in the future.
Moderator: Dr. Andreas Wais, ISTA Secretary General
Join this webinar on Tuesday, 15 June via this link.
Time: 16:00 - 17:30 CEST