Effects of subambient and elevated CO[sub 2] on Rubisco in C[sub 3] and C[sub 4] plants
- Duke Univ., Durham, NC (United States)
Amaranthus retroflexus (C4) and Abutilon theophrasti (C3) were grown from seed at 4 CO[sub 2] concentrations: 15 Pa (Pleistocene minimum), 27 Pa (preindustrial), 35 Pa (current), and 70 Pa (future) in the Duke Phytotron under high light, nutrient and water conditions. Net photosynthesis at the growth CO[sub 2] concentration increased with elevated CO[sub 2] for C[sub 3] and C[sub 4] Plants. Total Rubisco activity and content increased linearly with CO[sub 2] for A. theophrasti. For A. retroflexus, Rubisco activity and content increased 22% for plants grown at ambient CO[sub 2] compared with 15 Pa and decreased 21% for plants grown at 70 Pa compared with ambient CO[sub 2] plants. Results indicate Rubisco limitation to photosynthesis during the Pleistocene minimum and different C[sub 3] and C[sub 4] plant response to historic and future CO[sub 2] conditions.
- OSTI ID:
- 6201886
- Report Number(s):
- CONF-930798-; CODEN: BECLAG
- Journal Information:
- Bulletin of the Ecological Society of America; (United States), Vol. 74:2; Conference: 78. annual Ecological Society of America (ESA) meeting, Madison, WI (United States), 31 Jul - 4 Aug 1993; ISSN 0012-9623
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
CARBON DIOXIDE
BIOLOGICAL EFFECTS
PLANTS
PHOTOSYNTHESIS
C4 SPECIES
FORECASTING
PALEOCLIMATOLOGY
PLANT GROWTH
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
GROWTH
OXIDES
OXYGEN COMPOUNDS
PALEONTOLOGY
PHOTOCHEMICAL REACTIONS
SYNTHESIS
560300* - Chemicals Metabolism & Toxicology
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)