Person: Medina Bujalance, Rafael
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First Name
Rafael
Last Name
Medina Bujalance
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Biológicas
Department
Biodiversidad, Ecología y Evolución
Area
Botánica
Identifiers
4 results
Search Results
Now showing 1 - 4 of 4
Item Phylogenomic delineation of Physcomitrium (Bryophyta: Funariaceae) based on targeted sequencing of nuclear exons and their flanking regions rejects the retention of Physcomitrella, Physcomitridium and Aphanorrhegma(Journal of Systematics and Evolution, 2019) Medina Bujalance, Rafael; Johnson, Matthew G.; Liu, Yang ; Wickett, Norman J. ; Shaw, A. Jonathan ; Goffinet, BernardSelection on spore dispersal mechanisms in mosses is thought to shape the transformation of the sporophyte. The majority of extant mosses develop a sporangium that dehisces through the loss of an operculum, and regulates spore release through the movement of articulate teeth, the peristome, lining the capsule mouth. Such complexity was acquired by the Mesozoic Era, but was lost in some groups during subsequent diversification events, challenging the resolution of the affinities for taxa with reduced architectures. The Funariaceae are a cosmopolitan and diverse lineage of mostly annual mosses, and exhibit variable sporophyte complexities, spanning from long, exerted, operculate capsules with two rings of well-developed teeth, to capsules immersed among maternal leaves, lacking a differentiated line of dehiscence (i.e., inoperculate) and without peristomes. The family underwent a rapid diversification, and the relationships of taxa with reduced sporophytes remain ambiguous. Here, we infer the relationships of five taxa with highly reduced sporophytes based on 648 nuclear loci (exons complemented by their flanking regions), based on inferences from concatenated data and concordance analysis of single gene trees. Physcomitrellopsis is resolved as nested within one clade of Entosthodon. Physcomitrella s. l., is resolved as a polyphyletic assemblage and, along with its putative relative Aphanorrhegma, nested within Physcomitrium. We propose a new monophyletic delineation of Physcomitrium, which accommodates species of Physcomitrella and Aphanorrhegma. The monophyly of Physcomitrium s. l. is supported by a small plurality of exons, but a majority of trees inferred from exons and their adjacent non-coding regions.Item Resolution of the ordinal phylogeny of mosses using targeted exons from organellar and nuclear genomes(NAture Communications, 2019) Liu, Yang ; Johnson, Matthew G. ; Cox, Cymon J. ; Medina Bujalance, Rafael; Devos, Nicolas ; Vanderpoorten, Alain ; Hedenäs, Lars ; Bell, Neil E. ; Shevock, James R. ; Aguero, Blanka ; Quandt, Dietmar; Wickett, Norman J. ; Shaw, A. Jonathan ; Goffinet, BernardMosses are a highly diverse lineage of land plants, whose diversification, spanning at least 400 million years, remains phylogenetically ambiguous due to the lack of fossils, massive early extinctions, late radiations, limited morphological variation, and conflicting signal among previously used markers. Here, we present phylogenetic reconstructions based on complete organellar exomes and a comparable set of nuclear genes for this major lineage of land plants. Our analysis of 142 species representing 29 of the 30 moss orders reveals that relative average rates of non-synonymous substitutions in nuclear versus plastid genes are much higher in mosses than in seed plants, consistent with the emerging concept of evolutionary dynamism in mosses. Our results highlight the evolutionary significance of taxa with reduced morphologies, shed light on the relative tempo and mechanisms underlying major cladogenic events, and suggest hypotheses for the relationships and delineation of moss orders.Item On the priority of Orthotrichum cylindrocarpum over O. coulteri and Lesquereux's early vindication of an autonomous American bryology(Taxon, 2019) Medina Bujalance, Rafael; Francisco Lara; Bernard Goffinet; Ricardo Garilleti; Vicente MazimpakaIn a recent revision of the Orthotrichum tenellum complex, the authors erroneously concluded that the name O. coulteri predated the supposed synonym O. cylindrocarpum. This confusion was due to incongruent publication dates reported in the literature and lack of evidence of effective publication of the latter. Here, we demonstrate that the name O. cylindrocarpum was indeed published a few months before O. coulteri based on correspondence by the authorities and dated reprints. The almost simultaneous publication of both names occurred during a period in which some early American bryologists advocated that the discovery of new species from North America should be reported by them and not by their European colleagues.Item DNA based revised geographic circumscription of species of Physcomitrella s.l. (Funariaceae): P. patens new to East Asia and P. magdalenae new to East Africa(Bryologist, 2015) Medina Bujalance, Rafael; Yang Liu; Wang Li-Song; Guo Shuiliang; Kristoffer Hylander; Bernard GoffinetPhyscomitrella, as traditionally defined, accommodates certain Funariaceae with immersed and cleistocarpous capsules. Recent molecular inferences revealed that the three or four taxa typically recognized within Physcomitrella did not arise from a unique common ancestor, and hence that their morphological similarities likely resulted from convergence, while one potential taxon, P. patens subsp. californica ( = Physcomitridium readeri s.l.), is currently regarded as a polyphyletic entity, making Physcomitridium polyphyletic. Following recent discoveries that would greatly expand the known range of two taxa, we sampled populations of Physcomitrella s.l. from all main geographic regions, and sequenced the nuclear ITS regions and four plastid loci to assess the geographic circumscription of each clade. We recovered three unambiguous monophyletic entities matching the three morphotypes recognized by Fife, each with a distinct geographic range: Physcomitrella patens s.str. with a range in Europe and North America extended to East Asia (China); P. magdalenae with a range from West and Central Africa extended eastwards to Ethiopia; and Physcomitridium (Physcomitrella) readeri from western Europe and western North America to Japan and Australia, plus a doubtful occurrence in China. Although the distinction of P. californica from P. readeri remains doubtful, we reject the hypothesis that Physcomitridium is polyphyletic, arguing that this resulted from a misidentification of the sequenced voucher.