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Fernando O. Zuloaga - One of the best experts on this subject based on the ideXlab platform.
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Divergence time estimations for subtribe Panicinae.
2018Co-Authors: Fernando O. Zuloaga, Diego L. Salariato, Amalia ScatagliniAbstract:A. Maximum clade credibility (MCC) tree of Panicoideae obtained from BEAST analyses with ndhF sequences using the uncorrelated lognormal relaxed clock model and secondary calibrations based only on external angiosperm fossils. Only subtribe Paniceae is shown in detail; for the remaining clades see Fig 1. Maximum likelihood bootstrap ≥ 70% and Bayesian posterior probability ≥ 0.9 are shown above/below the branches, respectively. Horizontal bars on the nodes indicate the 95% HPD of ages. Vertical bars indicate sections within Panicum. Paniceae 1 and Paniceae 2 refer the “Dichanthelinae+ Boivinellinae” clade and the “Incertae sedis genera” clade, respectively. B. Divergence time estimations for crown nodes (MRCA) of subtribe Panicinae, Louisiella, Panicum, and sections of Panicum, based only on external angiosperm fossils (black bars), or angiosperm fossils plus grass phytoliths (red bars). Bars show the 95% HPD of estimated ages, while the squares on bars indicate the median value. Black circles to the right of taxon names indicate new sequences generated for this study. Mya, million years ago; Pli, Pliocene; Plei, Pleistocene.
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Figura 28 in 30. Panicum
2013Co-Authors: Fernando O. Zuloaga, Diego Giraldo-cañasAbstract:Figura 28. Distribución geográfica de Panicum polygonatum (Δ), y P. scabridum (-) en Colombia
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a phylogenetic evaluation of Panicum sects agrostoidea megista prionitia and tenera panicoideae poaceae two new genera stephostachys and sorengia
Taxon, 2010Co-Authors: Fernando O. Zuloaga, Amalia Scataglini, Osvaldo MorroneAbstract:The taxonomic features of species ofPanicum, previously classified in Panicum subg. Agrostoidea and Phanopyrum including sects. Megista, Tenera, Prionitia and Agrostoidea, are reviewed and compared with subg. Panicum and other taxa of Paniceae. All taxa, previously considered in these subgenera and sections, are now included in the new genera Stephostachys and Sorengia, which are based on morphological and molecular characters. Stephostachys includes one species, S. mertensii (Roth) Zuloaga & Morrone, ranging from Mexico to Argentina, while Sorengia comprises seven species, S. anceps (Michx.) Zuloaga & Morrone, S. caricoides (Nees ex Trin.) Zuloaga & Morrone, Sorengia longifolia (Torr.) Zuloaga & Morrone S. petensonii (Hitchc. & Ekman) Zuloaga & Morrone, S. prionitis (Nees) Zuloaga & Morrone, S. stenodes (Griseb.) Zuloaga & Morrone, and S. tenera (Beyr. ex Trin.) Zuloaga & Morrone, distributed from the United States to Bolivia and Brazil. Affinities of the new genera with other genera of Paniceae are discussed. Lectotypes are designated for Panicum caricoides var. glabriusculum Doll, P. caricoides var. pilosum Doll, P. prionitis Nees, P. prionitis var. varium Kuntze, and P. stenodes Griseb.
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anatomia foliar das especies de Panicum l subg Panicum poaceae panicoideae paniceae ocorrentes no brasil
Iheringia Serie Botanica, 2008Co-Authors: Adriana Guglieri, Hilda Maria Longhiwagner, Fernando O. ZuloagaAbstract:An analysis of the leaf anatomy of the thirty species of Panicum L. subg. Panicum occurring in Brazil was performed, aiming to find useful characters for their identification. Midblade transverse sections were conducted using a microtome and dyed with Blue Toluidine. Transverse sections were viewed with an Olympus CH30 microscope and photographs were taken using an Olympus PM-C35B camera. The anatomical characters with higher taxonomic value are: presence and depth of furrows on adaxial surface of the epidermis; presence and distribution of papillae on epidermical cells; presence and type of columns of colorless cells in the mesophyll; and relative size of bundle sheath´s parenchymatic cells on second order bundles, and if the size is not uniform, the shape of their adaxial cells. The results indicated that leaf anatomy characters are more useful for the delimitation of the sections of Panicum subg. Panicum, although differentiating some of the studied species.
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Panicum sect dichotomiflora hitchc chase honda e p sect virgata hitchc chase ex pilg poaceae panicoideae paniceae no brasil
Acta Botanica Brasilica, 2007Co-Authors: Adriana Guglieri, Hilda Maria Longhiwagner, Fernando O. ZuloagaAbstract:(Panicum sect. Dichotomiflora (Hitchc. & Chase) Honda and P. sect. Virgata Hitchc. & Chase ex Pilg. (Poaceae: Panicoideae: Paniceae) in Brazil). Panicum L. subg. Panicum includes nearly 100, mostly tropical and subtropical species; of these, 50 taxa are American, ranging from Canada to Brazil, Argentina and Uruguay. A total of 30 species are present in Brazil, three without a defined section and 27 included in P. sect. Dichotomiflora (Hitchc. & Chase) Honda, P. sect. Panicum, P. sect. Rudgeana (Hitchc.) Zuloaga, P. sect. Urvilleana (Hitchc. & Chase) Pilger and P. sect. Virgata Hitchc. & Chase ex Pilg. The aim of this paper is to present a systematic study of native and naturalized species of P. sect. Dichotomiflora and P. sect. Virgata in Brazil: Panicum sect. Dichotomiflora has 6 species in the country (of a total of 11 species in the section), growing in wet habitats suh as swamps or river banks. Panicum sect. Virgata includes 4 species in Brazil, present in habitats such as grasslands "cerrado" and swamps. Keys to the species of both sections are given, as well as tables, morphological descriptions, illustrations, and scanning electron micrographs of the upper anthecium surface.
Amalia Scataglini - One of the best experts on this subject based on the ideXlab platform.
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Molecular phylogeny of Panicum s. str. (Poaceae, Panicoideae, Paniceae) and insights into its biogeography and evolution.
PloS one, 2018Co-Authors: Diego L. Salariato, Amalia ScatagliniAbstract:Panicum sensu stricto is a genus of grasses (Poaceae) with nearly, according to this study, 163 species distributed worldwide. This genus is included in the subtribe Panicinae together with Louisiella, the latter with 2 species. Panicum and subtribe Panicinae are characterized by including annual or perennial taxa with open and lax panicles, and spikelets with the lower glume reduced; all taxa also share a basic chromosome number of x = 9 and a Kranz leaf blade anatomy typical of the NAD-me subtype photosynthetic pathway. Nevertheless, the phylogenetic placements of many Panicum species, and the circumscription of the genus, remained untested. Therefore, phylogenetic analyses were conducted using sequence data from the ndhF plastid region, in an extensive worldwide sampling of Panicum and related genera, in order to infer evolutionary relationships and to provide a phylogenetic framework to review the classification of the genus. Diversification times, historical biogeography and evolutionary patterns of the life history (annual vs. perennial) in the subtribe and Panicum were also studied. Results obtained provide strong support for a monophyletic Panicum including 71 species and 7 sections, of which sections Arthragrostis and Yakirra are new in the genus; 7 new combinations are made here. Furthermore, 32 species traditionally assigned to Panicum were excluded from the genus, and discussed in other subtribes of Paniceae. Our study suggested that early diversification in subtribe Panicinae and Panicum occurred through the Early-Mid Miocene in the Neotropics, while the subsequent diversification of its sections mainly occurred in the Late Miocene-Pleistocene, involving multiple dispersals to all continents. Our analyses also showed that transition rates and changes between annual and perennial life history in Panicum were quite frequent, suggesting considerable lability of this trait. Changes of the life history, together with C4 photosynthesis, and the multiple dispersal events since the Mid Miocene, seem to have facilitated a widespread distribution of the genus. All these findings contribute to a better understanding of the systematics and evolution of Panicum.
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Sect. Yakirra.
2018Co-Authors: Fernando O. Zuloaga, Diego L. Salariato, Amalia ScatagliniAbstract:Panicum majusculum. A. Spikelet, lower glume view. B. Spikelet, upper glume view. C. Upper anthecium, palea view with stipe. D. Upper anthecium, lemma view. Sect. Repentia. Panicum repens. E. Spikelet, upper glume view. F. Spikelet, lower glume view. G. Upper anthecium, palea view. H. Upper anthecium, lemma view. I. Upper palea and lodicules.
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Divergence time estimations for subtribe Panicinae.
2018Co-Authors: Fernando O. Zuloaga, Diego L. Salariato, Amalia ScatagliniAbstract:A. Maximum clade credibility (MCC) tree of Panicoideae obtained from BEAST analyses with ndhF sequences using the uncorrelated lognormal relaxed clock model and secondary calibrations based only on external angiosperm fossils. Only subtribe Paniceae is shown in detail; for the remaining clades see Fig 1. Maximum likelihood bootstrap ≥ 70% and Bayesian posterior probability ≥ 0.9 are shown above/below the branches, respectively. Horizontal bars on the nodes indicate the 95% HPD of ages. Vertical bars indicate sections within Panicum. Paniceae 1 and Paniceae 2 refer the “Dichanthelinae+ Boivinellinae” clade and the “Incertae sedis genera” clade, respectively. B. Divergence time estimations for crown nodes (MRCA) of subtribe Panicinae, Louisiella, Panicum, and sections of Panicum, based only on external angiosperm fossils (black bars), or angiosperm fossils plus grass phytoliths (red bars). Bars show the 95% HPD of estimated ages, while the squares on bars indicate the median value. Black circles to the right of taxon names indicate new sequences generated for this study. Mya, million years ago; Pli, Pliocene; Plei, Pleistocene.
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Panicum stramineum.
2018Co-Authors: Fernando O. Zuloaga, Diego L. Salariato, Amalia ScatagliniAbstract:A. Habit. B. Spikelet, lateral view. C. Spikelet, lower glume view. D. Spìkelet, upper glume view. E. Lower palea. F. Upper anthecium, dorsal view. G. Upper anthecium, palea view. H. Caryopsis, embryo view. I. Caryopsis, hilum view.
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a phylogenetic evaluation of Panicum sects agrostoidea megista prionitia and tenera panicoideae poaceae two new genera stephostachys and sorengia
Taxon, 2010Co-Authors: Fernando O. Zuloaga, Amalia Scataglini, Osvaldo MorroneAbstract:The taxonomic features of species ofPanicum, previously classified in Panicum subg. Agrostoidea and Phanopyrum including sects. Megista, Tenera, Prionitia and Agrostoidea, are reviewed and compared with subg. Panicum and other taxa of Paniceae. All taxa, previously considered in these subgenera and sections, are now included in the new genera Stephostachys and Sorengia, which are based on morphological and molecular characters. Stephostachys includes one species, S. mertensii (Roth) Zuloaga & Morrone, ranging from Mexico to Argentina, while Sorengia comprises seven species, S. anceps (Michx.) Zuloaga & Morrone, S. caricoides (Nees ex Trin.) Zuloaga & Morrone, Sorengia longifolia (Torr.) Zuloaga & Morrone S. petensonii (Hitchc. & Ekman) Zuloaga & Morrone, S. prionitis (Nees) Zuloaga & Morrone, S. stenodes (Griseb.) Zuloaga & Morrone, and S. tenera (Beyr. ex Trin.) Zuloaga & Morrone, distributed from the United States to Bolivia and Brazil. Affinities of the new genera with other genera of Paniceae are discussed. Lectotypes are designated for Panicum caricoides var. glabriusculum Doll, P. caricoides var. pilosum Doll, P. prionitis Nees, P. prionitis var. varium Kuntze, and P. stenodes Griseb.
Osvaldo Morrone - One of the best experts on this subject based on the ideXlab platform.
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New Species of Paniceae (Poaceae, Panicoideae) from Brazil
Systematic Botany, 2011Co-Authors: Diego L. Salariato, Osvaldo Morrone, Fernando O. ZuloagaAbstract:Abstract Two new species of Paniceae are here described, one belonging to Dichanthelium (Dichanthelium barbadense) and the other to Panicum sect. Laxa (Panicum harleyi). Both taxa grow in open areas of Central Brazil are described, illustrated, and compared with putative related species.
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a phylogenetic evaluation of Panicum sects agrostoidea megista prionitia and tenera panicoideae poaceae two new genera stephostachys and sorengia
Taxon, 2010Co-Authors: Fernando O. Zuloaga, Amalia Scataglini, Osvaldo MorroneAbstract:The taxonomic features of species ofPanicum, previously classified in Panicum subg. Agrostoidea and Phanopyrum including sects. Megista, Tenera, Prionitia and Agrostoidea, are reviewed and compared with subg. Panicum and other taxa of Paniceae. All taxa, previously considered in these subgenera and sections, are now included in the new genera Stephostachys and Sorengia, which are based on morphological and molecular characters. Stephostachys includes one species, S. mertensii (Roth) Zuloaga & Morrone, ranging from Mexico to Argentina, while Sorengia comprises seven species, S. anceps (Michx.) Zuloaga & Morrone, S. caricoides (Nees ex Trin.) Zuloaga & Morrone, Sorengia longifolia (Torr.) Zuloaga & Morrone S. petensonii (Hitchc. & Ekman) Zuloaga & Morrone, S. prionitis (Nees) Zuloaga & Morrone, S. stenodes (Griseb.) Zuloaga & Morrone, and S. tenera (Beyr. ex Trin.) Zuloaga & Morrone, distributed from the United States to Bolivia and Brazil. Affinities of the new genera with other genera of Paniceae are discussed. Lectotypes are designated for Panicum caricoides var. glabriusculum Doll, P. caricoides var. pilosum Doll, P. prionitis Nees, P. prionitis var. varium Kuntze, and P. stenodes Griseb.
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phylogenetic studies in the paniceae poaceae panicoideae ocellochloa a new genus from the new world
Systematic Botany, 2009Co-Authors: Silvana M. Sede, Osvaldo MorroneAbstract:Abstract The present contribution continues a critical revision of Panicum, particularly with the delimitation of “incertae sedis” taxa. A phylogenetic analysis of Paniceae based on cpDNA sequence data (ndhF) was performed with special emphasis on section Stolonifera of Panicum. Fourteen sequences of species of sect. Stolonifera and Echinolaena were added to a panicoid grass matrix previously published giving a total of 140 sequences. As a result, Ocellochloa is here described as a new genus including 12 new combinations: O. andreana, O. biglandularis, O. brachystachya, O. chapadensis, O. craterifera, O. irregularis, O. latissima, O. piauiensis, O. pulchella, O. rudis, O. soderstromii , and O. stolonifera. The position of Panicum venezuelae, previously placed in section Stolonifera with the above mentioned species, clearly indicates that this species is not closely related to the Ocellochloa clade. This conclusion is supported by several morphological characters, such as the presence of axillary infloresc...
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Phylogenetic Studies in the Paniceae (Poaceae): a Realignment of Section Lorea of Panicum
Systematic Botany, 2008Co-Authors: Silvana M. Sede, Osvaldo Morrone, Liliana M. Giussani, Fernando O. ZuloagaAbstract:Abstract The taxonomic status of Panicum section Lorea has remained as “incertae sedis” within Panicum. To resolve its position within the Paniceae and to test the monophyly of this section, phylogenetic analyses based on chloroplast sequence data (ndhF) and morphology were conducted for the Paniceae with particular emphasis on Panicum section Lorea. The results did not support the monophyly of this section. The species of this group were resolved in two clades which are not sister groups and neither of them is closely related to Panicum s.s. As a result, two new genera are proposed and described: Apochloa and Renvoizea, which are restricted to the Guiana highlands and eastern Brazil. New combinations are: Apochloa animara, A. bahiense, A. chnoodes, A. cipoense, A. eligulata, A. euprepes, A. jauana, A. lorea, A. lutzii, A. molinioides, A. poliophylla, A. sipapoense, A. steyermarkii, A. subtiramulosa, A. tijucae, Renvoizea acicularifolia, R. durifolia, R. glaziovii, R. lagostachya, R. marauense, R. resting...
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cyphonanthus a new genus segregated from Panicum poaceae panicoideae paniceae based on morphological anatomical and molecular data
Taxon, 2007Co-Authors: Osvaldo Morrone, Amalia Scataglini, Fernando O. ZuloagaAbstract:Panicum L., as traditionally circumscribed, is one of the largest genera of Poaceae, with approximately 450 species distributed worldwide (Webster, 1988). Recent phylogenetic studies in this genus, based on morphological and molecular data have clearly shown that Panicum is a polyphyletic genus (Gomez-Martinez & Culham, 2000; Zuloaga & al., 2000; Giussani & al., 2001; Duvall & al., 2001, 2003; Aliscioni & al., 2003). As a consequence, subgenera were raised or reinstated at the generic level, such as Dichanthelium (Hitchc. & Chase) Gould, Phanopyrum Raf., Steinchisma Raf., and Meg-athyrsus (Pilg.) B.K. Simon & S.W.L. Jacobs (Zuloaga & al., 1998, 2003; Aliscioni & al., 2003; Freckmann & Lelong, 2003; Simon & Jacobs, 2003; Barkworth, 2006). At the same time, Panicum was restricted to its type subgenus (Aliscioni & al., 2003) and all remaining species classified as incertae sedis within Paniceae. Among these species, Panicum discrepans Doll, pre-viously classified in the monotypic sect. Discrepantia (Zuloaga, 1987), is unique by having lower glumes ab-sent or reduced, gibbous spikelet, and upper anthecium open at the apex and with long, curled macrohairs at the apex and base. A detailed discussion of relationships in Panicum , segregated genera and incertae sedis species can be found in Zuloaga & al. (2006).The purpose of this study is to evaluate the taxonomic position of Panicum discrepans. New molecular evidence from the ndhF (NADH dehydrogenase subunit F) gene and from the grass-specific insert in the rpoC2 (subunit C2 of an RNA polymerase) gene, together with several morphological and anatomical characters support the formation of a new genus.
Lisa A. Castlebury - One of the best experts on this subject based on the ideXlab platform.
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rust fungi on Panicum
Mycologia, 2017Co-Authors: Jill E Demers, Sarah Hambleton, Lisa A. CastleburyAbstract:ABSTRACTRusts are economically important diseases of switchgrass (Panicum virgatum) and other Paniceae grasses. Phylogenetic analyses based on sequences of the nuc rDNA 5.8S internal transcribed spacer 2 region (ITS2), partial 28S region, and intergenic spacer region (IGS) of nuc rDNA showed that species of rust fungi infecting switchgrass are closely related within Puccinia. Variation among rbcLa sequences for the associated hosts sampled concurred with the original identifications. Five species infecting switchgrass were recognized: Puccinia graminicola (≡ Uromyces graminicola), P. pammelii (= P. panici), and the proposed new species P. amari, P. novopanici, and P. pascua. These species were distinct from P. emaculata, the species previously considered the principal rust pathogen infecting switchgrass but that was found exclusively on witchgrass (Panicum capillare) in this study. Rust fungi on switchgrass previously identified as P. emaculata were identified as the morphologically similar species P. ama...
Devin J Rose - One of the best experts on this subject based on the ideXlab platform.
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in vitro pepsin digestibility of cooked proso millet Panicum miliaceum l and related species from around the world
Journal of Agricultural and Food Chemistry, 2018Co-Authors: Paridhi Gulati, Dipak K. Santra, Shangang Jia, David R Holding, Devin J RoseAbstract:Thirty-three samples of proso millet (Panicum miliaceum) with different countries of origin were screened for their pepsin digestibility after cooking to identify samples with high digestibility. The pepsin digestibility of all samples ranged from 26% to 57% (average 32%). There were no apparent differences in protein profiles (by sodium dodecyl sulfate–polyacrylamide gel electrophoresis, SDS–PAGE) of samples with the lowest, intermediate, and highest digestibilities. However, liquid chromatographic–tandem mass spectrometric (LC-MS/MS) analysis revealed a negative correlation between pepsin digestibility and peptides that matched to high molecular weight proteins (24 kDa) from Panicum hallii with regions of contiguous hydrophobic amino acids. Low digestibility upon cooking was also observed for other species from the Panicum genus, such as little millet, switchgrass, and panicgrass, which suggests a unique inherent property of the genus. The results obtained from this study may form a basis for in-depth a...
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In Vitro Pepsin Digestibility of Cooked Proso Millet (Panicum miliaceum L.) and Related Species from Around the World
2018Co-Authors: Paridhi Gulati, Shangang Jia, David R Holding, Dipak Santra, Devin J RoseAbstract:Thirty-three samples of proso millet (Panicum miliaceum) with different countries of origin were screened for their pepsin digestibility after cooking to identify samples with high digestibility. The pepsin digestibility of all samples ranged from 26% to 57% (average 32%). There were no apparent differences in protein profiles (by sodium dodecyl sulfate–polyacrylamide gel electrophoresis, SDS–PAGE) of samples with the lowest, intermediate, and highest digestibilities. However, liquid chromatographic–tandem mass spectrometric (LC-MS/MS) analysis revealed a negative correlation between pepsin digestibility and peptides that matched to high molecular weight proteins (24 kDa) from Panicum hallii with regions of contiguous hydrophobic amino acids. Low digestibility upon cooking was also observed for other species from the Panicum genus, such as little millet, switchgrass, and panicgrass, which suggests a unique inherent property of the genus. The results obtained from this study may form a basis for in-depth analysis of proso proteins that may help in developing new cultivars with higher digestibility upon cooking
