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High temperature flood injury of woody swamp seedlings

Conference · · Bull. Ecol. Soc. Am.; (United States)
OSTI ID:6107538
Seedlings in thermal effluent impacted swamp areas are exposed to varying combinations of elevated temperatures and flooding conditions. While species may be adapted to withstand flooded conditions, the addition of a high temperature stress may limit their ability to grow and survive. Bald cypress (Taxodium distichum (L.) Richard) and water tupelo (Nyssa aquatica L.) seedlings were exposed to simulated thermal effluents in a three month greenhouse study to examine various physiological responses. Flooding with ambient temperature (25 C) water had no effect on photosynthesis, transportation and root respiration rates, but decreased growth and tended to stimulate root ethylene production of both species. In addition to further growth reductions by the high temperature (40 C) flooded soil conditions, root respiration and ethylene production rates were decreased for both species and photosynthesis and transpiration were reduced for water tupelo seedlings. High temperature inhibition of ethylene production may be responsible for the observed reduction in morphological acclimation to flooding, hence limiting survival chances.
Research Organization:
Univ. of Utah, Salt Lake City, UT (US); Savannah River Ecology Lab., Aiken, SC (US)
OSTI ID:
6107538
Report Number(s):
CONF-870835-
Conference Information:
Journal Name: Bull. Ecol. Soc. Am.; (United States) Journal Volume: 68:3
Country of Publication:
United States
Language:
English