Effect of elevated CO2 on photosynthesis in non-nutrient limited Pinus taeda plants

Conference · Wed Jun 01 04:00:00 EDT 1994 · Bulletin of the Ecological Society of America; (United States)

OSTI ID:7016076

Lewis, J D; Tissue, D T; Strain, B R ^[1]

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1. Duke Univ., Durham, NC (United States)

We examined the effect of elevated CO2 on photosynthetic capacity in non-nutrient limited Pinus taeda plants. Plants were grown in open-top chambers maintained at either ambient or ambient +30 Pa CO2. Leaf nitrogen levels indicated that no plants were N limited. Photosynthesis at the growth CO2 was significantly higher in plants grown at elevated CO2. However, elevated CO2 did not significantly affect rubisco activity and activation state, chlorophyll content, electron transport capacity or phosphate regeneration capacity. All parameters were significantly greater during the growing season than during the winter. Additionally, photosynthesis declined approximately 75% in elevated CO2-grown plants from May to January, but only 50% in ambient CO2-grown plants. These results indicate that elevated CO2 will not effect photosynthetic capacity grown plants. These results indicate that elevated CO2 will not affect photosynthetic capacity grown plants. These results indicate that elevated CO2 will not affect photosynthetic capacity in non-nutrient limited P. taeda, but will increase seasonal fluctuations in photosynthesis.

• OSTI ID: 7016076
• Report Number(s): CONF-940894--
• Conference Information: Journal Name: Bulletin of the Ecological Society of America; (United States) Journal Volume: 75:2
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CONIFERS
ECOLOGICAL CONCENTRATION
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PINES
PINOPHYTA
PLANTS
SEASONAL VARIATIONS
SYNTHESIS
TREES
VARIATIONS