Submitted to: American Society of Horticulture Science Meeting
Publication Type: Abstract Only
Publication Acceptance Date: February 15, 2004
Publication Date: July 1, 2004
Citation: Frantz, J. 2004. Exploring the Myth that Temperature Determines Respiration Rates. American Society of Horticulture Science Meeting. 39:723. Technical Abstract: Plant scientists are taught, beginning as undergraduates, that respiration rises exponentially with temperature. These statements are often supported with theoretical curves showing a smooth exponential rise of "respiration" quadrupling as temperature rises from 10 to 30C or more providing the convenient, overused and over simplified rule of thumb that respiration has a Q10 of 2.0. In several studies with rapidly growing lettuce, soybean, and tomato, we found no evidence that respiration rises exponentially with temperature or the Q10 is anywhere close to 2.0, and in fact, respiration may not be significantly different at different temperatures. In searching the literature, evidence is found that leads one to conclude that the role of temperature on respiration is variable, at best, and in some cases may not play a role at all in final respiration rates. This talk is designed to simulate discussion on the role of respiration in crop plants and the environmental influences on respiration. Recent controlled environment gas-exchange data and literature values will be included in this analysis.