J
J. Travis Columbus
Researcher at Rancho Santa Ana Botanic Garden
Publications - 44
Citations - 1212
J. Travis Columbus is an academic researcher from Rancho Santa Ana Botanic Garden. The author has contributed to research in topics: Chloridoideae & Monophyly. The author has an hindex of 19, co-authored 43 publications receiving 1084 citations. Previous affiliations of J. Travis Columbus include Claremont Graduate University.
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Anatomical enablers and the evolution of C4 photosynthesis in grasses
Pascal-Antoine Christin,Colin P. Osborne,David S. Chatelet,J. Travis Columbus,Guillaume Besnard,Trevor R. Hodkinson,Laura M. Garrison,Maria S. Vorontsova,Erika J. Edwards +8 more
TL;DR: Results show that key alterations of foliar anatomy occurring in a C3 context and preceding the emergence of the C4 syndrome by millions of years facilitated the repeated evolution of one of the most successful physiological innovations in angiosperm history.
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Phylogenetic Relationships in Cariceae (Cyperaceae) Based on ITS (nrDNA) and trnT-L-F (cpDNA) Region Sequences: Assessment of Subgeneric and Sectional Relationships in Carex with Emphasis on Section Acrocystis
TL;DR: A molecular phylogenetic study employing nrDNA ITS and cpDNA trnT-L-F spacer sequences assesses relationships within Carex section Acrocystis and identifies a monophyletic group for more detailed study, suggesting that Cymophyllus, Kobresia, Schoenoxiphium, and Uncinia are nested within carex.
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Classification and Biogeography of New World Grasses: Chloridoideae
TL;DR: Subfamily Chloridoideae (Poaceae) in the New World includes 72 genera (61 native, 11 introduced), 678 species (607 native), and, including intraspecific taxa, 817 total taxa.
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Molecular phylogenetics of suborder Cactineae (Caryophyllales), including insights into photosynthetic diversification and historical biogeography.
TL;DR: Reconstruction of photosynthesis diversification showed C(3) to be the ancestral pathway, a shift to C(4) in Portulacaceae, and five independent origins of Crassulacean acid metabolism (CAM) showed Cactineae were inferred to have originated in the New World.
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Molecular phylogenetics, historical biogeography, and chromosome number evolution of Portulaca (Portulacaceae).
TL;DR: The analyses strongly support the monophyly of Portulaca, with an age of the most recent common ancestor (MRCA) of 23 Myr and a number of chromosome number change events shown to have occurred in the genus, especially within the Oleracea clade.