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Carbon Partitioning in Eelgrass (Regulation by Photosynthesis and the Response to Daily Light-Dark Cycles)
Open accessAbstract
Diel variations in rates of C export, sucrose-phosphate synthase (SPS) and sucrose synthase (SS) activity, and C reserves were investigated in Zostera marina L. (eelgrass) to elucidate the environmental regulation of sucrose formation and partitioning in this ecologically important species. Rates of C flux and SPS activity increased with leaf age, consistent with the ontogenic transition from sink to source status. Rates of C export and photosynthesis were low but quantitatively consistent with those of many terrestrial plant species. The Vmax activity of SPS approached that of maize, but substrate-limited rates were 20 to 25% of Vmax, indicating a large pool of inactive SPS. SPS was unresponsive to the day/night transition or to a 3-fold increase in photosynthesis generated by high [CO2] and showed little sensitivity to inorganic phosphate. Consequently, regulation of eelgrass SPS appeared similar to starch- rather than to sugar-accumulating species even though eelgrass accumulates sucrose. Leaf [sucrose] was constant and high throughout the diel cycle, which may contribute to the down-regulation of SPS. Root sucrose synthase activity was high but showed no response to nocturnal anoxia. Root [sucrose] also showed no diel cycle. The temporal stability of [sucrose] confers an ability for eelgrass to buffer the effects of prolonged light limitation that may be key to its survival and ecological success in environments subject to periods of extreme light limitation and chaotic daily variation in light availability.
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That logarithmic response matched model predictions derived from meta-analysis.
“that was fundamentally consistent with model predictions based on meta- (Zimmerman et al. 1995, 1997, Palacios & Zimmerman 2007)”
From Experimental impacts of climate warming and ocean carbonation on eelgrass Zostera marina (2017) · cites this paper as Zimmerman et al. 1995
The Rates of Photoassimilate Export and SPS Activity section reports that eelgrass export rates were consistent with a regression based on data from other species. The Discussion likewise describes agreement with patterns in terrestrial crop plants. Neither passage addresses a logarithmic response or model predictions derived from meta-analysis; searches for those terms found no supporting passage in our copy. Page numbers were not available. (LLM, conf=0.73)
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Research works printed but not linked: 5
- Huber SC, Kerr PS, Kalt-Torres W (1985) Regulation of sucrose formation and movement. In RL Heath, J Preiss, eds, Regulation of Carbon Partitioning in Photosynthetic Tissues: Proceedings of the 8th Symposium of the American Society of Plant Physiolo- gists. American Society of Plant Physiologists, Rockville, MD, pp
- Mann KH (1982) Ecology of Coastal Waters: A Systems Approach. University of California Press, Berkeley 297-323 199-215
- Smith RD (1989) Anaerobic metabolism in the roots of the seagrass Zostera marina L. PhD dissertation, The University of Chicago
- Springer B, Werr W, Starlinger P, Bennett DC, Zokolica M, Freeling M (1986) The Shrunken gene on chromosome 9 of Zea mays L. is expressed in various plant tissues and encodes an anaerobic protein. Mo1 Gen Genet 205: 461-468
- Zimmerman RC, Reguzzoni JL, Alberte RS (1995) Eelgrass (Zos- tera marina) transplants in San Francisco Bay: role of light avail- ability on metabolism, growth and survival. Aquat Bot (in press)
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Palacios, S., & Zimmerman, R. (2007) · Marine Ecology Progress Series · doi:10.3354/meps07084 · Cited by 253
Self-citationInvers, O., Zimmerman, R. C., Alberte, R. S., Pérez, M., & Romero, J. (2001) · Journal of Experimental Marine Biology and Ecology · doi:10.1016/s0022-0981(01)00332-x · Cited by 158
Self-citationJiang, Z. J., Huang, X., & Zhang, J. (2010) · Journal of Integrative Plant Biology · doi:10.1111/j.1744-7909.2010.00991.x · Cited by 122
Alexandre, A., Silva, J., Buapet, P., Björk, M., & Santos, R. (2012) · Ecology and Evolution · doi:10.1002/ece3.333 · Cited by 103
Experimental impacts of climate warming and ocean carbonation on eelgrass Zostera marina
Zimmerman, R., Hill, V., Jinuntuya, M., Celebi, B., Ruble, D., Smith, M., Cedeno, T., & Swingle, W. (2017) · Marine Ecology Progress Series · doi:10.3354/meps12051 · Cited by 59
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Metadata
- Authors
- Zimmerman, R. C., Kohrs, D. G., Steller, D. L., & Alberte, R. S.
- Affiliations
- University of California, Los Angeles (US)
- Venue
- Plant Physiology
- Publisher
- Oxford University Press (OUP)
- Published
- 1995-08-01
- Volume
- 108
- Issue
- 4
- Pages
- 1665-1671
- ISSN
- 0032-0889 (ISSN-L)
- 1532-2548
- PMC
- PMC157548
- OpenAlex
- W1598924313
- Cited by
- 59
- References
- 0
- Citations by year
- 2023: 2 · 2022: 1 · 2020: 1 · 2019: 1 · 2018: 3 · 2017: 3 · 2016: 1 · 2015: 7 · 2014: 1 · 2013: 1 · 2012: 3
- FWCI
- 1.08
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- PLANT PHYSIOLOGY (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal plant biology
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant nutrient uptake and metabolism
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
- Keywords
- Zostera marina, carbon allocation, sucrose phosphate synthase, sucrose synthase, diurnal variation, photosynthesis, carbon export, leaf age, sink-source transition, light limitation, carbon reserves, substrate limitation, inorganic phosphate
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