Exploring natural variation of photosynthesis in a site-specific manner: evolution, progress, and prospects

Dehigaspitiyage, Prabuddha and Milham, Paul and Ash, Gavin J. and Arun‑Chinnappa, Kiruba and Gamage, Dananjali and Martin, Anke and Nagasaka, Seiji and Seneweera, Saman (2019) Exploring natural variation of photosynthesis in a site-specific manner: evolution, progress, and prospects. Planta, 250. pp. 1033-1050. ISSN 0032-0935


Abstract

Global food security is threatened by an increasing population and the effects of climate change. Large yield improvements were achieved in major cereal crops between the 1950s and 1980s through the Green Revolution. However, we are currently experiencing a significant decline in yield progress. Of the many approaches to improved cereal yields,exploitation of the mode of photosynthesis has been intensely studied. Even though the C4 pathway is considered the most efficient, mainly because of the carbon concentrating mechanisms around the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase, which minimize photorespiration, much is still unknown about the specific gene regulation of this mode of photosynthesis. Most of the critical cereal crops, including wheat and rice, are categorized as C3 plants based on the photosynthesis of major photosynthetic organs. However, recent findings raise the possibility of different modes of photosynthesis occurring at different sites in the same plant and/or in plants grown in different habitats. That is, it seems possible that efficient photosynthetic traits may be expressed in specific organs, even though the major photosynthetic pathway is C3. Knowledge of site-specific differences in photosynthesis, coupled with site-specific regulation of gene expression, may therefore hold a potential to enhance the yields of economically important C3 crops.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Date Deposited: 31 Jan 2020 06:19
Last Modified: 10 Feb 2020 01:07
Uncontrolled Keywords: Crop improvement, Engineering C4 into C3, Photorespiration, Photosynthesis gene regulation
Fields of Research : 07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070303 Crop and Pasture Biochemistry and Physiology
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970107 Expanding Knowledge in the Agricultural and Veterinary Sciences
Identification Number or DOI: 10.1007/s00425-019-03223-1
URI: http://eprints.usq.edu.au/id/eprint/37782

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