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Exploring relationships between canopy architecture, light distribution, and photosynthesis in contrasting rice genotypes using 3D canopy reconstruction
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Burgess, Alexandra J., Retkute, Renata, Herman, Tiara and Murchie, Erik H. (2017) Exploring relationships between canopy architecture, light distribution, and photosynthesis in contrasting rice genotypes using 3D canopy reconstruction. Frontiers in Plant Science, 8 . 734. doi:10.3389/fpls.2017.00734 ISSN 1664-462X.
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Official URL: https://doi.org/10.3389/fpls.2017.00734
Abstract
The arrangement of leaf material is critical in determining the light environment, and subsequently the photosynthetic productivity of complex crop canopies. However, links between specific canopy architectural traits and photosynthetic productivity across a wide genetic background are poorly understood for field grown crops. The architecture of five genetically diverse rice varieties-four parental founders of a multi-parent advanced generation intercross (MAGIC) population plus a high yielding Philippine variety (IR64)-was captured at two different growth stages using a method for digital plant reconstruction based on stereocameras. Ray tracing was employed to explore the effects of canopy architecture on the resulting light environment in high-resolution, whilst gas exchange measurements were combined with an empirical model of photosynthesis to calculate an estimated carbon gain and total light interception. To further test the impact of different dynamic light patterns on photosynthetic properties, an empirical model of photosynthetic acclimation was employed to predict the optimal light-saturated photosynthesis rate (Pmax ) throughout canopy depth, hypothesizing that light is the sole determinant of productivity in these conditions. First, we show that a plant type with steeper leaf angles allows more efficient penetration of light into lower canopy layers and this, in turn, leads to a greater photosynthetic potential. Second the predicted optimal Pmax responds in a manner that is consistent with fractional interception and leaf area index across this germplasm. However, measured Pmax , especially in lower layers, was consistently higher than the optimal Pmax indicating factors other than light determine photosynthesis profiles. Lastly, varieties with more upright architecture exhibit higher maximum quantum yield of photosynthesis indicating a canopy-level impact on photosynthetic efficiency.
Item Type: | Journal Article | ||||||
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Subjects: | Q Science > QK Botany | ||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||
SWORD Depositor: | Library Publications Router | ||||||
Library of Congress Subject Headings (LCSH): | Photosynthesis, Plant canopies, Rice, Three-dimensional imaging, Crop yields | ||||||
Journal or Publication Title: | Frontiers in Plant Science | ||||||
Publisher: | Frontiers Media S.A. | ||||||
ISSN: | 1664-462X | ||||||
Official Date: | 17 May 2017 | ||||||
Dates: |
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Volume: | 8 | ||||||
Number of Pages: | 15 | ||||||
Article Number: | 734 | ||||||
DOI: | 10.3389/fpls.2017.00734 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Reuse Statement (publisher, data, author rights): | ** From Europe PMC via Jisc Publications Router. ** Licence for this article: cc by | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Date of first compliant deposit: | 15 September 2017 | ||||||
Date of first compliant Open Access: | 15 September 2017 | ||||||
Funder: | Biotechnology and Biological Sciences Research Council (Great Britain) (BBSRC) | ||||||
Grant number: | BB/JOO3999/1 |
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