Photosynthesis in reproductive structures: Costs and benefits

Raven, JA; Griffiths, H

Photosynthesis in reproductive structures: Costs and benefits

Raven, JA

Griffiths, H

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Publication Type:: Journal Article
Citation:: Journal of Experimental Botany, 2015, 66 (7), pp. 1699 - 1705
Issue Date:: 2015-01-01

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Field	Value	Language
dc.contributor.author	Raven, JA https://orcid.org/0000-0002-2789-3297	en_US
dc.contributor.author	Griffiths, H	en_US
dc.date.issued	2015-01-01	en_US
dc.identifier.citation	Journal of Experimental Botany, 2015, 66 (7), pp. 1699 - 1705	en_US
dc.identifier.issn	0022-0957	en_US
dc.identifier.uri	http://hdl.handle.net/10453/118582
dc.description.abstract	© The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology. The role of photosynthesis by reproductive structures during grain-filling has important implications for cereal breeding, but the methods for assessing the contribution by reproductive structures to grain-filling are invasive and prone to compensatory changes elsewhere in the plant. A technique analysing the natural abundance of stable carbon isotopes in soluble carbohydrates has significant promise. However, it depends crucially on there being no more than two sources of organic carbon (leaf and ear/awn), with significantly different<sup>13</sup>C:<sup>12</sup>C ratios and no secondary fractionation during grain-filling. The role of additional peduncle carbohydrate reserves represents a potential means for N remobilization, as well as for hydraulic continuity during grain-filling. The natural abundance of the stable isotopes of carbon and oxygen are also useful for exploring the influence of reproduction on whole plant carbon and water relations and have been used to examine the resource costs of reproduction in females and males of dioecious plants. Photosynthesis in reproductive structures is widespread among oxygenic photosynthetic organisms, including many clades of algae and embryophytes of different levels of complexity. The possible evolutionary benefits of photosynthesis in reproductive structures include decreasing the carbon cost of reproduction and 'use' of transpiratory loss of water to deliver phloem-immobile calcium Ca<sup>2+</sup> and silicon [Si(OH)<inf>4</inf>] via the xylem. The possible costs of photosynthesis in reproductive structures are increasing damage to DNA from photosynthetically active, and hence UV-B, radiation and the production of reactive oxygen species.	en_US
dc.relation.ispartof	Journal of Experimental Botany	en_US
dc.relation.isbasedon	10.1093/jxb/erv009	en_US
dc.subject.classification	Plant Biology & Botany	en_US
dc.subject.mesh	Triticum	en_US
dc.subject.mesh	Plant Shoots	en_US
dc.subject.mesh	Carbon Isotopes	en_US
dc.subject.mesh	Photosynthesis	en_US
dc.title	Photosynthesis in reproductive structures: Costs and benefits	en_US
dc.type	Journal Article
utslib.citation.volume	7	en_US
utslib.citation.volume	66	en_US
utslib.for	0607 Plant Biology	en_US
utslib.for	0703 Crop and Pasture Production	en_US
utslib.for	0604 Genetics	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
utslib.copyright.status	closed_access
pubs.issue	7	en_US
pubs.publication-status	Published	en_US
pubs.volume	66	en_US

Abstract:

© The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology. The role of photosynthesis by reproductive structures during grain-filling has important implications for cereal breeding, but the methods for assessing the contribution by reproductive structures to grain-filling are invasive and prone to compensatory changes elsewhere in the plant. A technique analysing the natural abundance of stable carbon isotopes in soluble carbohydrates has significant promise. However, it depends crucially on there being no more than two sources of organic carbon (leaf and ear/awn), with significantly different¹³C:¹²C ratios and no secondary fractionation during grain-filling. The role of additional peduncle carbohydrate reserves represents a potential means for N remobilization, as well as for hydraulic continuity during grain-filling. The natural abundance of the stable isotopes of carbon and oxygen are also useful for exploring the influence of reproduction on whole plant carbon and water relations and have been used to examine the resource costs of reproduction in females and males of dioecious plants. Photosynthesis in reproductive structures is widespread among oxygenic photosynthetic organisms, including many clades of algae and embryophytes of different levels of complexity. The possible evolutionary benefits of photosynthesis in reproductive structures include decreasing the carbon cost of reproduction and 'use' of transpiratory loss of water to deliver phloem-immobile calcium Ca²⁺ and silicon [Si(OH)4] via the xylem. The possible costs of photosynthesis in reproductive structures are increasing damage to DNA from photosynthetically active, and hence UV-B, radiation and the production of reactive oxygen species.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/118582