Acclimation of respiratory O{sub 2} uptake in green tissues of field-grown native species after long-term exposure to elevated atmospheric CO{sub 2}
Journal Article
·
· Plant Physiology (Bethesda)
OSTI ID:35736
- Universitat de Barcelona (Spain)
- Smithsonian Environmental Research Center, Edgewater, MD (United States)
C{sub 3} and C{sub 4} plants were grown in open-top chambers in the field at two CO{sub 2} concentrations, normal ambient (ambient) and normal ambient + 340 {mu}L L{sup {minus}1} (elevated). Dark oxygen uptake was measured in leaves and stems using a liquid-phase Clark-type oxygen electrode. High CO{sub 2} treatment decreased dark oxygen uptake in stems of Scirpus olneyi (C{sub 3}) and leaves of Lindera benzoin (C{sub 3}) expressed on either a dry weight or area basis. Respiration of Spartina patens (C{sub 4}) leaves was unaffected by CO{sub 2} treatment. Leaf dry weight per unit area was unchanged by CO{sub 2}, but respiration per unit of carbon or per unit of nitrogen was decreased in the C{sub 3} species grown at high CO{sub 2}. The component of respiration in stems of S. olneyi and leaves of L. benzoin primarily affected by long-term exposure to the elevated CO{sub 2} treatment was the activity of the cytochrome pathway. Elevated CO{sub 2} had no effect on activity and capacity of the alternative pathway in S. olneyi. The cytochrome c oxidase activity, assayed in a cell-free extract, was strongly decreased by growth at high CO{sub 2} in stems of S. olneyi but it was unaffected in S. patens leaves. The activity of cytochrome c oxidase and complex III extracted from mature leaves of L. benzoin was also decreased after one growing season of plant exposure to elevated CO{sub 2} concentration. These results show that in some C{sub 3} species respiration will be reduced when plants are grown in elevated atmospheric CO{sub 2}. The possible physiological causes and implications of these effects are discussed. 34 refs., 1 fig., 6 tabs.
- OSTI ID:
- 35736
- Journal Information:
- Plant Physiology (Bethesda), Journal Name: Plant Physiology (Bethesda) Journal Issue: 3 Vol. 106; ISSN 0032-0889; ISSN PLPHAY
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dark respiration of CO[sub 2] and C[sub 4] high marsh perennials is modified by atmospheric CO[sub 2] concentration during growth in open top chambers
Rubisco concentration and total leaf carboxylase activity was reduced but leaf and canopy photosynthesis remained high in Scirpus olneyi grown in the field at elevated atmospheric CO[sub 2] for seven years
Elevated atmospheric CO sub 2 effects on belowground processes in C sub 3 and C sub 4 estuarine marsh communities. [S. Spartina]
Conference
·
Wed Jun 01 00:00:00 EDT 1994
· Bulletin of the Ecological Society of America; (United States)
·
OSTI ID:7016123
Rubisco concentration and total leaf carboxylase activity was reduced but leaf and canopy photosynthesis remained high in Scirpus olneyi grown in the field at elevated atmospheric CO[sub 2] for seven years
Conference
·
Wed Jun 01 00:00:00 EDT 1994
· Bulletin of the Ecological Society of America; (United States)
·
OSTI ID:7272372
Elevated atmospheric CO sub 2 effects on belowground processes in C sub 3 and C sub 4 estuarine marsh communities. [S. Spartina]
Journal Article
·
Mon Oct 01 00:00:00 EDT 1990
· Ecology; (USA)
·
OSTI ID:5922336