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Evidence for direct carotenoid involvement in the regulation of photosynthetic light harvesting
Open accessAbstract
Nonphotochemical quenching (NPQ) refers to a process that regulates photosynthetic light harvesting in plants as a response to changes in incident light intensity. By dissipating excess excitation energy of chlorophyll molecules as heat, NPQ balances the input and utilization of light energy in photosynthesis and protects the plant against photooxidative damage. To understand the physical mechanism of NPQ, we have performed femtosecond transient absorption experiments on intact thylakoid membranes isolated from spinach and transgenic Arabidopsis thaliana plants. These plants have well defined quenching capabilities and distinct contents of xanthophyll (Xan) cycle carotenoids. The kinetics probed in the spectral region of the S 1 → S n transition of Xans (530–580 nm) were found to be significantly different under the quenched and unquenched conditions, corresponding to maximum and no NPQ, respectively. The lifetime and the spectral characteristics indicate that the kinetic difference originated from the involvement of the S 1 state of a specific Xan, zeaxanthin, in the quenched case.
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Cited by
Ultrafast transient absorption spectroscopy: principles and application to photosynthetic systems
Berera, R., van Grondelle, R., & Kennis, J. T. M. (2009) · Photosynthesis Research · doi:10.1007/s11120-009-9454-y · Cited by 894
Photoprotection in an ecological context: the remarkable complexity of thermal energy dissipation
Demmig‐Adams, B., & Adams, W. W. (2006) · New Phytologist · doi:10.1111/j.1469-8137.2006.01835.x · Cited by 892
Ultrafast Dynamics of Carotenoid Excited States−From Solution to Natural and Artificial Systems
Polívka, T., & Sundström, V. (2004) · Chemical Reviews · doi:10.1021/cr020674n · Cited by 889
The photoprotective molecular switch in the photosystem II antenna
Ruban, A. V., Johnson, M. P., & Duffy, C. D. P. (2012) · Biochimica et Biophysica Acta (BBA) - Bioenergetics · doi:10.1016/j.bbabio.2011.04.007 · Cited by 750
Li, X.-P., Gilmore, A. M., Caffarri, S., Bassi, R., Golan, T., Kramer, D., & Niyogi, K. K. (2004) · Journal of Biological Chemistry · doi:10.1074/jbc.m402461200 · Cited by 573
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Metadata
- Authors
- Ma, Y.-Z., Holt, N. E., Li, X.-P., Niyogi, K. K., & Fleming, G. R.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 2003-04-03
- Volume
- 100
- Issue
- 8
- Pages
- 4377-4382
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2168278332
- Cited by
- 214
- References
- 0
- FWCI
- 7.08
- Type
- journal article
- Language
- en
- Open access
- green
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- Ma, Y.-Z., Holt, N. E., Li, X.-P., Niyogi, K. K., & Fleming, G. R. (2003). Evidence for direct carotenoid involvement in the regulation of photosynthetic light harvesting. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0736959100
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