Prepared for global warming?
Genetic diversity at a rice locus that triggers an escape or endurance strategy to overcome submergence stress
| When |
31 Jan, 2008
from
10:00 am to 11:00 am |
|---|---|
| Where | Auditorium |
| Speaker(s) |
Julia Bailey-Serres University of California, USA |
| Add event to your calendar |
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Prepared for global warming? Genetic diversity at a rice locus that triggers an escape or endurance strategy to overcome submergence stress
Abstract
Flooding, an environmental stress for many natural and man-made ecosystems, is enhanced as a consequence of global warming. Rice (Oryza sativa) is a semi-aquatic plant that has evolved multiple strategies to cope with partial to complete submergence. Although most rice cultivars die within a week of complete submergence, a locus with remarkable genetic diversity has been identified that can confer long-term tolerance of submergence. The Submergence-1 (Sub1) locus encodes up to three Ethylene Response Factor-type transcription factors (Sub1A, Sub1B and Sub1C). The allelic composition and regulation of these genes determines whether or not the acclimation response promotes escape or endurance of submergence stress. Recent studies with near isogenic and transgenic lines have uncovered the molecular basis of these antithetical submergence responses. The process involves the three plant hormones ethylene, abscisic acid and gibberillin that coordinate a network of acclimation responses that manage utilization of carbohydrate reserves and control elongation growth.
Speaker: Julia Bailey-Serres
Affiliation: Plant Cell Biology, University of California, Riverside, USA
Host: Ricardo Boavida Ferreira
