Abstract
Developmental changes in photosynthetic gas exchange were investigated in the mannitol synthesizing plant celery (Apium graveolens L. `Giant Pascal'). Greenhouse-grown plants had unusually high photosynthetic rates for a C3 plant, but consistent with field productivity data reported elsewhere for this plant. In most respects, celery exhibited typical C3 photosynthetic characteristics; light saturation occurred at 600 micromoles photons per square meter per second, with a broad temperature optimum, peaking at 26°C. At 2% O2, photosynthesis was enhanced 15 to 25% compared to rates at 21% O2. However, celery had low CO2 compensation points, averaging 7 to 20 microliters per liter throughout the canopy. Conventional mechanisms for concentrating CO2 were not detectable.
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Selected References
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- Ehleringer J. R., Björkman O. A comparison of photosynthetic characteristics of encelia species possessing glabrous and pubescent leaves. Plant Physiol. 1978 Aug;62(2):185–190. doi: 10.1104/pp.62.2.185. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Rumpho M. E., Edwards G. E., Loescher W. H. A pathway for photosynthetic carbon flow to mannitol in celery leaves : activity and localization of key enzymes. Plant Physiol. 1983 Dec;73(4):869–873. doi: 10.1104/pp.73.4.869. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Yancey P. H., Clark M. E., Hand S. C., Bowlus R. D., Somero G. N. Living with water stress: evolution of osmolyte systems. Science. 1982 Sep 24;217(4566):1214–1222. doi: 10.1126/science.7112124. [DOI] [PubMed] [Google Scholar]