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Function of Nicotiana tabacum Aquaporins as Chloroplast Gas Pores Challenges the Concept of Membrane CO 2 Permeability
Open accessAbstract
Photosynthesis is often limited by the rate of CO(2) diffusion from the atmosphere to the chloroplast. The primary resistances for CO(2) diffusion are thought to be at the stomata and at photosynthesizing cells via a combination resulting from resistances of aqueous solution as well as the plasma membrane and both outer and inner chloroplast membranes. In contrast with stomatal resistance, the resistance of biological membranes to gas transport is not widely recognized as a limiting factor for metabolic function. We show that the tobacco (Nicotiana tabacum) plasma membrane and inner chloroplast membranes contain the aquaporin Nt AQP1. RNA interference-mediated decreases in Nt AQP1 expression lowered the CO(2) permeability of the inner chloroplast membrane. In vivo data show that the reduced amount of Nt AQP1 caused a 20% change in CO(2) conductance within leaves. Our discovery of CO(2) aquaporin function in the chloroplast membrane opens new opportunities for mechanistic examination of leaf internal CO(2) conductance regulation.
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Citations
Cited by
Maurel, C., Boursiac, Y., Luu, D.-T., Santoni, V., Shahzad, Z., & Verdoucq, L. (2015) · Physiological Reviews · doi:10.1152/physrev.00008.2015 · Cited by 940
Role of aquaporins in leaf physiology
Heinen, R. B., Ye, Q., & Chaumont, F. (2009) · Journal of Experimental Botany · doi:10.1093/jxb/erp171 · Cited by 304
Temperature response of carbon isotope discrimination and mesophyll conductance in tobacco.
EVANS, J. R., & VON CAEMMERER, S. (2013) · Plant, Cell & Environment · doi:10.1111/j.1365-3040.2012.02591.x · Cited by 241
von Caemmerer, S., & Evans, J. R. (2010) · Plant Physiology · doi:10.1104/pp.110.160952 · Cited by 142
Enhancing C3 photosynthesis: an outlook on feasible interventions for crop improvement.
Singh, J., Pandey, P., James, D., Chandrasekhar, K., Achary, V. M. M., Kaul, T., Tripathy, B. C., & Reddy, M. K. (2014) · Plant Biotechnology Journal · doi:10.1111/pbi.12246 · Cited by 100
Metadata
- Authors
- Uehlein, N., Otto, B., Hanson, D. T., Fischer, M., McDowell, N., & Kaldenhoff, R.
- Venue
- The Plant Cell
- Publisher
- Oxford University Press (OUP)
- Published
- 2008-03
- Volume
- 20
- Issue
- 3
- Pages
- 648-657
- ISSN
- 1040-4651 (ISSN-L)
- 1532-298X
- OpenAlex
- W2118061859
- Cited by
- 293
- References
- 0
- FWCI
- 8.56
- Type
- journal article
- Language
- en
- Open access
- green
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- CoChat. (2026). Citation check: Function of Nicotiana tabacum Aquaporins as Chloroplast Gas Pores Challenges the Concept of Membrane CO 2 Permeability. https://app.cochat.ai/papers/10.1105/tpc.107.054023
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- Uehlein, N., Otto, B., Hanson, D. T., Fischer, M., McDowell, N., & Kaldenhoff, R. (2008). Function of Nicotiana tabacum Aquaporins as Chloroplast Gas Pores Challenges the Concept of Membrane CO 2 Permeability. The Plant Cell. https://doi.org/10.1105/tpc.107.054023
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
