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- W2045940519 abstract "• Premise of the study: Portulacaceae is a family with a remarkable diversity in photosynthetic pathways. This lineage not only has species with different C 4 biochemistry (NADP‐ME and NAD‐ME types) and C 3 ‐C 4 intermediacy, but also displays different leaf anatomical configurations. Here we addressed the evolutionary history of leaf anatomy and photosynthetic pathways in Portulacaceae. • Methods: Photosynthetic pathways were assessed based on leaf anatomy and carbon isotope ratios. Information on the NADP‐ME and NAD‐ME C 4 variants was obtained from the literature. The evolutionary relationships and trait evolution were estimated under a Bayesian framework, and divergence times were calibrated using the ages obtained in a previous study. • Key results: C 4 photosynthesis is the main pathway in Portulacaceae. One clade (Cryptopetala), however, includes species that have non‐Kranz anatomy and C 3 type isotope values, two of which are C 3 ‐C 4 intermediates. The ancestral leaf anatomy for the family is uncertain. The analysis showed one origin of the C 4 pathway, which was lost in the Cryptopetala clade. Nevertheless, when a second analysis was performed taking into account the limited number of species with NAD‐ME and NADP‐ME data, a secondary gain of the C 4 pathway from a C 3 ‐C 4 intermediate was inferred. • Conclusions: The C 4 pathway evolved ca. 23 Myr in the Portulacaceae. The number of times that the pathway evolved in the family is uncertain. The diversity of leaf anatomical types and C 4 biochemical variants suggest multiple independent origins of C 4 photosynthesis. Evidence for a switch from C 4 to C 3 ‐C 4 intermediacy supports the hypothesis that intermediates represent a distinct successful strategy." @default.
- W2045940519 created "2016-06-24" @default.
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- W2045940519 date "2013-12-01" @default.
- W2045940519 modified "2023-10-12" @default.
- W2045940519 title "Evolution of leaf anatomy and photosynthetic pathways in Portulacaceae" @default.
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- W2045940519 doi "https://doi.org/10.3732/ajb.1300094" @default.
- W2045940519 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24259525" @default.
- W2045940519 hasPublicationYear "2013" @default.
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