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OOS-1:
Appreciating the impacts of oxidative stress: From genes to ecosystems
Mercury
cycles: Sources, mass balances, bioaccumulation, and options to manage affected
systems
Endorsed
by the ESA Physiological Ecology Section
Monday,
August 8, 8 AM - 11:30 AM, Meeting Rooms 510a and 510c, Level 5, Palais
des congrès de Montréal
Organizers:
Howard Neufeld (neufeldhs@appstate.edu),
Nancy Grulke
Descripton:
Oxidative
stress is a common plant response that results from a variety of environmental
stressors that include excess light, drought, extreme temperatures, and
pollution, and in particular, ozone. Although well-studied by biochemists and
physiologists, its importance in ecological studies has been less well
appreciated. Oxidative stress can alter gene expression, impair physiological
processes, act as a selective agent in plant populations, and, at the community
and ecosystem levels, possibly alter competitive relationships as well as
hydrologic and nutrient cycles. The discovery of genetic mutants with varying
levels of tolerance to oxidants, and the manipulation of genes involved in
oxidative stress, has opened new avenues of research. As the effects of
oxidative stress are expressed at all levels of organization, consequences will
accrue going from the tissue, plant, population to the ecosystem levels. This
organized oral session will explore how oxidative stress in plants scales from
molecules to ecosystems.
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