Enhanced thylakoid photoprotection can increase yield and canopy radiation use efficiency in rice

Hubbart, Stella, Smillie, Ian R.A., Heatley, Matthew, Swarup, Ranjan, Foo, Chuan Ching, Zhao, Liang and Murchie, Erik H. (2018) Enhanced thylakoid photoprotection can increase yield and canopy radiation use efficiency in rice. Communications Biology, 1 . 22/1-22/12. ISSN 2399-3642

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High sunlight can raise plant growth rates but can potentially cause cellular damage. The likelihood of deleterious effects is lowered by a sophisticated set of photoprotective mechanisms, one of the most important being the controlled dissipation of energy from chlorophyll within photosystem II (PSII) measured as non-photochemical quenching (NPQ). Although ubiquitous, the role of NPQ in plant productivity remains uncertain because it momentarily reduces the quantum efficiency of photosynthesis. Here we used plants overexpressing the gene encoding a central regulator of NPQ, the protein PsbS, within a major crop species (rice) to assess the effect of photoprotection at the whole canopy scale. We accounted for canopy light interception, to our knowledge for the first time in this context. We show that in comparison to wild-type plants, psbS overexpressors increased canopy radiation use efficiency and grain yield in fluctuating light, demonstrating that photoprotective mechanisms should be altered to improve rice crop productivity.

Item Type: Article
Keywords: light responses; non-photochemical quenching
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Biosciences > Division of Plant and Crop Sciences
Identification Number: https://doi.org/10.1038/s42003-018-0026-6
Related URLs:
Depositing User: Murchie, Erik
Date Deposited: 22 Mar 2018 10:31
Last Modified: 22 Mar 2018 12:20
URI: https://eprints.nottingham.ac.uk/id/eprint/50438

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