PSC Frontier Seminar Series
Title: Drying without dying: regulatory mechanisms leading to anhydrobiosis
Speaker: Prof Olivier LEPRINCE. Agrocampus Oues, France
Day/Date: Oct. 30th, 2017 (Monday)
Host PI: Prof. Jiankang Zhu
Venue: No.1 Conference Room
Water is essential for life. Yet most seeds, pollens and the so-called resurrection plants are able to dry out completely and yet remain viable, a phenomenon known as anhydrobiosis (“life without water”). In this presentation, we will show how anhydrobiosis is at the basis of agriculture and briefly review the mechanisms that have evolved to allow complete desiccation without loss of viability (namely desiccation tolerance) and to enable seeds to achieve remarkable life spans during storage in the dry state (longevity). Demonstrating that in developing seeds, desiccation tolerance and longevity are acquired progressively and sequentially in parallel with other developmental programs such as seed filling, we will present our recent work aiming at deciphering the key regulators regulating anhydrobiosis focussing on ABA-dependent and -independent signalling pathways using a systems biology approach.
Since 2000, Dr. Olivier Leprince is Professor in Plant Physiology at “Agrocampus Ouest”, a higher education institute forming engineers and PhD students in Agriculture and Horticulture in Angers, France. He received his Ph.D. in 1992 from the University of Liège (Belgium). He then went for several postdocs successively in the University of Gueph (Canada), USDA (USA), John Innes Centre (UK) and the University of Wageningen (The Netherlands). Together with Dr. Julia Buitink, he leads team “Conservation and seed stress tolerance” within the Research Institute of Horticulture and Seeds, Angers, France. His research interests are related to desiccation tolerance and seed longevity and how developing seeds respond to abiotic stress and adapt their vigor accordingly. He has developed an expertise in the biophysics of dry seed systems and on regulatory mechanisms governing seed vigor during development of legumes. Prof. Leprince is associate editor of Seed Science Research and serves in several research and technology committees that advise on the development of research policies and of doctorate schools.