A portrait of the C4 photosynthetic family on the 50th anniversary of its discovery : species number, evolutionary lineages, and Hall of Fame

© The Author 2016. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.

Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 67(2016), 14 vom: 03. Juli, Seite 4039-56
1. Verfasser: Sage, Rowan F (VerfasserIn)
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2016
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Historical Article Journal Article Review Biodiversity C4 Hall of Fame C4 plants Cyperaceae Poaceae. convergent evolution photosynthetic evolution
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520 |a Fifty years ago, the C4 photosynthetic pathway was first characterized. In the subsequent five decades, much has been learned about C4 plants, such that it is now possible to place nearly all C4 species into their respective evolutionary lineages. Sixty-one independent lineages of C4 photosynthesis are identified, with additional, ancillary C4 origins possible in 12 of these principal lineages. The lineages produced ~8100 C4 species (5044 grasses, 1322 sedges, and 1777 eudicots). Using midpoints of stem and crown node dates in their respective phylogenies, the oldest and most speciose C4 lineage is the grass lineage Chloridoideae, estimated to be near 30 million years old. Most C4 lineages are estimated to be younger than 15 million years. Older C4 lineages tend to be more speciose, while those younger than 7 million years have <43 species each. To further highlight C4 photosynthesis for a 50th anniversary snapshot, a Hall of Fame comprised of the 40 most significant C4 species is presented. Over the next 50 years, preservation of the Earth's C4 diversity is a concern, largely because of habitat loss due to elevated CO2 effects, invasive species, and expanded agricultural activities. Ironically, some members of the C4 Hall of Fame are leading threats to the natural C4 flora due to their association with human activities on landscapes where most C4 plants occur 
650 4 |a Historical Article 
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650 4 |a Biodiversity 
650 4 |a C4 Hall of Fame 
650 4 |a C4 plants 
650 4 |a Cyperaceae 
650 4 |a Poaceae. 
650 4 |a convergent evolution 
650 4 |a photosynthetic evolution 
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