Effects of temperature and light on photosynthesis of dominant species of a northern hardwood forest. [Populus grandidentata, Quercus rubra, Betula papyrifera]

Journal Article · Wed Jun 01 00:00:00 EDT 1988 · Botanical Gazette (Chicago); (USA)

DOI:https://doi.org/10.1086/337708· OSTI ID:5033977

Jurik, T W ^[1]; Weber, J A ^[2]; Gates, D M ^[3]

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1. Iowa State Univ., Ames (USA)
2. Univ. of Michigan Biological Station, Ann Arbor (USA)
3. Univ. of Michigan, Ann Arbor (USA)

The response of CO{sub 2} exchange rate (CER) to temperature and light was determined for 14 dominant plant species of a northern deciduous hardwood forest in northern lower Michigan. Leaves at the top of the canopy had temperature optima near 25 C for CER, whereas leaves in the understory had optima near 20 C. There was no change in optimum temperature over the growing season, and overall shapes of response curves were similar among species. The lack of change in temperature optima may be a result of little change in growing conditions rather than a lack of ability to acclimatize. Nine of 11 species in the understory had no significant differences in light-saturated, maximum CERs, whereas at the top of the canopy Populus grandidentata had a higher maximum CER than Quercus rubra and Betula papyrifera. The species in the understory also differed little in light-saturation points for CER. Species at the top of the canopy had higher values for maximum CER, light-saturation point for CER, and maximum conductance than did species in the understory.

• DOE Contract Number: AC02-79EV10091
• OSTI ID: 5033977
• Journal Information: Botanical Gazette (Chicago); (USA), Vol. 149:2; ISSN 0006-8071
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
FORESTS
PLANT GROWTH
TREES
PHOTOSYNTHESIS
ASPENS
BIRCHES
OAKS
PHYSIOLOGY
TEMPERATURE EFFECTS
VISIBLE RADIATION
CHEMICAL REACTIONS
ELECTROMAGNETIC RADIATION
GROWTH
MAGNOLIOPHYTA
MAGNOLIOPSIDA
PHOTOCHEMICAL REACTIONS
PLANTS
POPLARS
RADIATIONS
SYNTHESIS
540210* - Environment
Terrestrial- Basic Studies- (1990-)