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Photosynthetic Uptake of Free CO2, by the Roots of Lobelia dortmanna
Abstract
Lobelia dortmanna L. is probably unable to utilize HCO 3−and uses only free CO 2 for photosynthesis as shown by the Winkler method. A 14 C technique was used to show that if CO 2 is added to the water around roots, photosynthesis increases 3–5 times more than when the corresponding amount of CO 2 is added to the water surroundings the leaves. As the CO 2 content in lakes where Lobelia grows is very limited, Lobelia must absorb CO 2 from the sediment, and the carbon dioxide will have to diffuse from the roots up into the leaves through the intercellular system of the plant. In conjunction with Lobelia's CO 2 uptake from the sediment O 2 is liberated. The plant, therefore, acts as an oxygen pump, which oxidizes the sediment down to a depth of 20 cm.
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Cited by
Interactions among phytoplankton, periphyton, and macrophytes in temperate freshwaters and estuaries
Sand-Jensen, K., & Borum, J. (1991) · Aquatic Botany · doi:10.1016/0304-3770(91)90042-4 · Cited by 697
Land-water interfaces: Metabolic and limnological regulators
Wetzel, R. G. (1990) · SIL Proceedings, 1922-2010 · doi:10.1080/03680770.1989.11898687 · Cited by 485
Oxygen Release from Roots of Submerged Aquatic Macrophytes
Sand-Jensen, K., Prahl, C., & Stokholm, H. (1982) · Oikos · doi:10.2307/3544675 · Cited by 391
EXOGENOUS SOURCES OF INORGANIC CARBON FOR PHOTOSYNTHESIS BY MARINE MACROALGAE1
Maberly, S. C. (1990) · Journal of Phycology · doi:10.1111/j.0022-3646.1990.00439.x · Cited by 256
Metadata
- Authors
- WIUM‐ANDERSEN, S.
- Venue
- Physiologia Plantarum
- Publisher
- Wiley
- Published
- 1971-10
- Volume
- 25
- Issue
- 2
- Pages
- 245-248
- ISSN
- 0031-9317 (ISSN-L)
- 1399-3054
- OpenAlex
- W2074404400
- Cited by
- 178
- References
- 0
- FWCI
- 1.37
- Type
- journal article
- Language
- en
- Open access
- closed
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- WIUM‐ANDERSEN, S. (1971). Photosynthetic Uptake of Free CO2, by the Roots of Lobelia dortmanna. Physiologia Plantarum. https://doi.org/10.1111/j.1399-3054.1971.tb01436.x
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