ORCID Profile
0000-0003-4144-6028
Current Organisation
Wageningen University
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Publisher: Oxford University Press (OUP)
Date: 24-06-2014
DOI: 10.1093/JXB/ERU253
Publisher: Springer Science and Business Media LLC
Date: 10-02-2016
DOI: 10.1038/SREP20694
Abstract: Arundo donax 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 A. donax growing in southern Portugal. We hypothesise that A. donax 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 A. donax resulted from a high capacity for both maximum Rubisco ( V c,max 117 μmol CO 2 m −2 s −1 ) and ribulose-1:5-bisphosphate limited carboxylation rate ( J max 213 μmol CO 2 m −2 s −1 ) under light-saturated conditions. Maximum quantum yield for light-limited CO 2 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 A. donax is high compared to other C3 species and comparable to C4 bioenergy grasses.
Publisher: Oxford University Press (OUP)
Date: 15-06-2017
DOI: 10.1093/JXB/ERX169
Publisher: The Royal Society
Date: 14-08-2017
Abstract: To meet the growing demand for food, substantial improvements in yields are needed. This is particularly the case for wheat, where global yield has stagnated in recent years. Increasing photosynthesis has been identified as a primary target to achieve yield improvements. To increase leaf photosynthesis in wheat, the level of the Calvin–Benson cycle enzyme sedoheptulose-1,7-biphosphatase (SBPase) has been increased through transformation and expression of a Brachypodium distachyon SBPase gene construct. Transgenic lines with increased SBPase protein levels and activity were grown under greenhouse conditions and showed enhanced leaf photosynthesis and increased total biomass and dry seed yield. This showed the potential of improving yield potential by increasing leaf photosynthesis in a crop species such as wheat. The results are discussed with regard to future strategies for further improvement of photosynthesis in wheat. This article is part of the themed issue ‘Enhancing photosynthesis in crop plants: targets for improvement’.
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Steven Driever.