Webster, Richard J and Driever, Steven M and Kromdijk, Johannes and McGrath, Justin and Leakey, Andrew DB and Siebke, Katharina and Demetriades-Shah, Tanvir and Bonnage, Steve and Peloe, Tony and Lawson, Tracy and Long, Stephen P (2016) High C3 photosynthetic capacity and high intrinsic water use efficiency underlies the high productivity of the bioenergy grass Arundo donax. Scientific Reports, 6 (1). 20694-. DOI https://doi.org/10.1038/srep20694
Webster, Richard J and Driever, Steven M and Kromdijk, Johannes and McGrath, Justin and Leakey, Andrew DB and Siebke, Katharina and Demetriades-Shah, Tanvir and Bonnage, Steve and Peloe, Tony and Lawson, Tracy and Long, Stephen P (2016) High C3 photosynthetic capacity and high intrinsic water use efficiency underlies the high productivity of the bioenergy grass Arundo donax. Scientific Reports, 6 (1). 20694-. DOI https://doi.org/10.1038/srep20694
Webster, Richard J and Driever, Steven M and Kromdijk, Johannes and McGrath, Justin and Leakey, Andrew DB and Siebke, Katharina and Demetriades-Shah, Tanvir and Bonnage, Steve and Peloe, Tony and Lawson, Tracy and Long, Stephen P (2016) High C3 photosynthetic capacity and high intrinsic water use efficiency underlies the high productivity of the bioenergy grass Arundo donax. Scientific Reports, 6 (1). 20694-. DOI https://doi.org/10.1038/srep20694
Abstract
<jats:title>Abstract</jats:title><jats:p><jats:italic>Arundo donax</jats:italic> has attracted interest as a potential bioenergy crop due to a high apparent productivity. It uses C3 photosynthesis yet appears competitive with C4 grass biomass feedstock’s and grows in warm conditions where C4 species might be expected to be that productive. Despite this there has been no systematic study of leaf photosynthetic properties. This study determines photosynthetic and photorespiratory parameters for leaves in a natural stand of <jats:italic>A. donax</jats:italic> growing in southern Portugal. We hypothesise that <jats:italic>A. donax</jats:italic> has a high photosynthetic potential in high and low light, stomatal limitation to be small and intrinsic water use efficiency unusually low. High photosynthetic rates in <jats:italic>A. donax</jats:italic> resulted from a high capacity for both maximum Rubisco (<jats:italic>V</jats:italic><jats:sub>c,max</jats:sub> 117 μmol CO<jats:sub>2</jats:sub> m<jats:sup>−2</jats:sup> s<jats:sup>−1</jats:sup>) and ribulose-1:5-bisphosphate limited carboxylation rate (<jats:italic>J</jats:italic><jats:sub>max</jats:sub> 213 μmol CO<jats:sub>2</jats:sub> m<jats:sup>−2</jats:sup> s<jats:sup>−1</jats:sup>) under light-saturated conditions. Maximum quantum yield for light-limited CO<jats:sub>2</jats:sub> assimilation was also high relative to other C3 species. Photorespiratory losses were similar to other C3 species under the conditions of measurement (25%), while stomatal limitation was high (0.25) resulting in a high intrinsic water use efficiency. Overall the photosynthetic capacity of <jats:italic>A. donax</jats:italic> is high compared to other C3 species and comparable to C4 bioenergy grasses.</jats:p>
Item Type: | Article |
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Uncontrolled Keywords: | Poaceae; Plant Leaves; Carbon Dioxide; Oxygen; Water; Biomass; Photosynthesis; Light |
Subjects: | Q Science > QH Natural history > QH301 Biology |
Divisions: | Faculty of Science and Health Faculty of Science and Health > Life Sciences, School of |
SWORD Depositor: | Unnamed user with email elements@essex.ac.uk |
Depositing User: | Unnamed user with email elements@essex.ac.uk |
Date Deposited: | 08 Mar 2016 15:55 |
Last Modified: | 30 Oct 2024 20:03 |
URI: | http://repository.essex.ac.uk/id/eprint/16211 |
Available files
Filename: srep20694.pdf
Licence: Creative Commons: Attribution 3.0