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Osvaldo Morrone - One of the best experts on this subject based on the ideXlab platform.
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revision of old world species of setaria poaceae panicoideae Paniceae
2014Co-Authors: Osvaldo Morrone, Sandra S Aliscioni, Fernando O Zuloaga, Jose Francisco Pensiero, Jan Frits Veldkamp, Elizabeth A. KelloggAbstract:Fil: Morrone, Osvaldo. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Botanica Darwinion. Academia Nacional de Ciencias Exactas, Fisicas y Naturales. Instituto de Botanica Darwinion; Argentina
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mayariochloa a new monotypic genus segregated from scutachne poaceae panicoideae Paniceae
Systematic Botany, 2012Co-Authors: Diego L. Salariato, Osvaldo Morrone, Fernando O ZuloagaAbstract:Abstract The genus Scutachne (Poaceae, Paniceae) is revised. This American genus, which included two species from the Caribbean, was circumscribed on the basis of morphological and molecular characters. To analyze both species of the genus, S. amphistemon and S. dura, a detailed study of the micromorphology of the upper anthecium and leaf anatomy, together with exomorphological characters, was performed. Both species differ in vegetative and reproductive characters, including blade distribution, ligules, presence of axillary inflorescences, consistency of upper glume, lower lemma, and lower palea, presence of a lower flower, upper anthecium ornamentation, and presence of a rachilla extension. Anatomically, S. dura is a C4 PCK species, while S. amphistemon is a C3, non-Kranz taxon. The molecular phylogenetic analysis supports these morphological differences. As a result, we concluded that Scutachne, as presently circumscribed, is a polyphyletic genus. Therefore, the genus is here redefined and S. amphistem...
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Phylogeny of the Paniceae (Poaceae: Panicoideae): integrating plastid DNA sequences and morphology into a new classification.
Cladistics, 2012Co-Authors: Osvaldo Morrone, Elizabeth A. Kellogg, Lone Aagesen, María Amalia Scataglini, Diego L. Salariato, Silvia S. Denham, Maria Amelia Chemisquy, Silvana M. Sede, Liliana M. Giussani, Fernando O. ZuloagaAbstract:Included in the PACMAD clade of the family Poaceae (Panicoideae, Arundinoideae, Chloridoideae, Micrairoideae, Aristidoideae, Danthonioideae), the tribe Paniceae s.l. is one of the largest tribes of the subfamily Panicoideae, with more than 2000 species. This tribe comprises a huge morphological, cytological and physiological diversity represented by different inflorescence types, several basic chromosome numbers, and at least four major photosynthetic pathways. The tribe Paniceae has been the subject of molecular studies that have confirmed its paraphyly: two major clades were recognized based on their basic chromosome numbers (x = 9, x = 10). The x = 10 Paniceae clade is sister to the Andropogoneae–Arundinelleae s.s. clade (x = 10), while the combined x = 10 clade is sister to the x = 9 clade that contains the remaining genera of Paniceae. As a result of a recent realignment within the tribe in terms of the phylogenetic position of minor and major Paniceae genera, a reanalysis of the whole sampling is performed and new underrepresented taxa are discussed. A total of 155 genera, currently considered within subfamily Panicoideae, are represented here by almost all genera of Paniceae s.l., representatives of Andropogoneae and Arundinelleae s.s., and the endemic and small tribe Steyermarkochloeae; we also included specimens of subfamily Micrairoideae, tribes Isachneae and Eriachneae. The sampling includes as outgroups 18 genera of the PACMAD clade (excluding Panicoideae) and four genera from the BEP clade (Bambusoideae, Ehrhartoideae, Pooideae), rooting with Bromus inermis. A matrix with 265 taxa based on the combined evidence from ndhF plastid sequences (2074 bp) and 57 morphological characters was subjected to parsimony analyses. Jackknife resampling was used to calculate group support. Most clades are characterized by morphological, cytological, anatomical, and/or physiological characters. Major tribal changes are based on the basic chromosome number; the pantropical x = 9 clade is here recognized as Paniceae s.s., while the American x = 10 Paniceae s.l. is restricted to the reinstated tribe Paspaleae. The optimization of the photosynthetic pathway for the Paspaleae–Andropogoneae–Arundinelleae s.s. clade, including the monotypic Reynaudia, shows a plesiomorphic C4 state while the ancestral state for Paniceae s.s. is ambiguous. If Reynaudia were not included or placed elsewhere, the ancestral photosynthetic pathway for both the Paspaleae–Andropogoneae–Arundinelleae s.s. clade and the Paniceae s.s. would be unambiguously C3. In order to explore character evolution further, the morphological characters were mapped onto one of the most parsimonious trees. A relationship between photosynthetic pathways and inflorescence morphology is suggested here for the first time. Based on the optimization of morphological characters and additional data, we propose names for almost all inner clades at the rank of subtribe with a few groups as incertae sedis. With this extensive sampling, we resolved the phylogenetic relationships and the assignation of synapomorphies, and improved the support in subtribe sorting; consequently a robust circumscription of the tribe Paniceae s.l. is proposed.
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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 M 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.
Fernando O Zuloaga - One of the best experts on this subject based on the ideXlab platform.
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Phylogeny of sections Clavelligerae and Pectinatae of Panicum (Poaceae, Panicoideae, Paniceae): establishment of the new subtribe Dichantheliinae and the genus Adenochloa
Plant Systematics and Evolution, 2015Co-Authors: Fernando O Zuloaga, L. Salomón, María Amalia ScatagliniAbstract:Taxonomic features of African species of Panicum sections Clavelligerae and Pectinatae are reviewed and compared with Dichanthelium and other taxa in tribe Paniceae. The new subtribe Dichantheliinae is proposed on the basis of molecular and morphological characters: it includes non-Kranz species, growing at forests edges or in mountain grasslands with membranous-ciliate ligules, lax and open inflorescences, ellipsoid to oblongoid spikelets, and an indurate upper anthecium. Within the Dichantheliinae , the new genus Adenochloa is also established on the basis of chloroplast ndhF sequences and morphological characters, i.e., plants with clavellate multicellular, and glandular hairs present on blades, main axis, branches, and pedicels of inflorescences; ellipsoid to oblongoid, glabrous spikelets, with a lower glume 1/3 to more than 1/2 the length of the spikelet; a 7–13-nerved upper glume and a 5–9-nerved lower lemma; the upper anthecium is indurate, pilose or glabrous. Adenochloa includes 14 species from Africa and Madagascar. The new combinations: Adenochloa adenophylla, A. adenophora, A. bullockii, A. claytonii, A. ecklonii, A. flacciflora, A. habrothrix, A. hymeniochila, A. lukwangulense, A. nigromarginata, A. pectinella, A. pole - evansii, A. sadinii , and A. squarrosa are proposed and the new genus is compared with other genera of the tribe Paniceae. Also, lectotypes are designated for Brachiaria sadinii, Panicum adenophorum, P. adenophyllum, P. ecklonii, P. katentaniense, P. kisantuense, P. hymeniochilum, P. hymeniochilum var. glandulosum, P. snowdenii , and P. scandens ; Panicum glanduliferum and P. omega are treated as new synonyms of Adenochloa hymeniochila and A. pectinella, respectively. Finally, new illustrations are provided for 6 species of the new genus.
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a peculiar amphitropical genus of Paniceae poaceae panicoideae
Systematic Botany, 2014Co-Authors: Amalia M Scataglini, Mabel A Lizarazu, Fernando O ZuloagaAbstract:Fil: Scataglini, Maria Amalia. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Botanica Darwinion. Academia Nacional de Ciencias Exactas, Fisicas y Naturales. Instituto de Botanica Darwinion; Argentina
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revision of old world species of setaria poaceae panicoideae Paniceae
2014Co-Authors: Osvaldo Morrone, Sandra S Aliscioni, Fernando O Zuloaga, Jose Francisco Pensiero, Jan Frits Veldkamp, Elizabeth A. KelloggAbstract:Fil: Morrone, Osvaldo. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Botanica Darwinion. Academia Nacional de Ciencias Exactas, Fisicas y Naturales. Instituto de Botanica Darwinion; Argentina
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morronea a new genus segregated from panicum Paniceae poaceae based on morphological and molecular data
Systematic Botany, 2013Co-Authors: Amalia M Scataglini, Fernando O ZuloagaAbstract:Abstract Taxonomic features of species of Panicum section Parviglumia are reviewed and compared with those of other taxa in tribe Paniceae. The new genus Morronea, including six species ranging from Mexico to Argentina, is proposed on the basis of morphological and molecular characters. They are plants growing at forest edges, with membranous-ciliate ligules, lower glume reduced, 1/6 to 1/4 the spikelet length, lower palea and lower flower absent, and upper anthecium indurate with simple papillae and conspicuous macrohairs all over its surface. The new combinations: Morronea arundinariae, M. cayoensis, M. guatemalensis, M. incumbens, M. parviglumis , and M. trichidiachnis are proposed and the new genus is compared with other genera of the tribe Paniceae.
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mayariochloa a new monotypic genus segregated from scutachne poaceae panicoideae Paniceae
Systematic Botany, 2012Co-Authors: Diego L. Salariato, Osvaldo Morrone, Fernando O ZuloagaAbstract:Abstract The genus Scutachne (Poaceae, Paniceae) is revised. This American genus, which included two species from the Caribbean, was circumscribed on the basis of morphological and molecular characters. To analyze both species of the genus, S. amphistemon and S. dura, a detailed study of the micromorphology of the upper anthecium and leaf anatomy, together with exomorphological characters, was performed. Both species differ in vegetative and reproductive characters, including blade distribution, ligules, presence of axillary inflorescences, consistency of upper glume, lower lemma, and lower palea, presence of a lower flower, upper anthecium ornamentation, and presence of a rachilla extension. Anatomically, S. dura is a C4 PCK species, while S. amphistemon is a C3, non-Kranz taxon. The molecular phylogenetic analysis supports these morphological differences. As a result, we concluded that Scutachne, as presently circumscribed, is a polyphyletic genus. Therefore, the genus is here redefined and S. amphistem...
Sandra S Aliscioni - One of the best experts on this subject based on the ideXlab platform.
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Morphology and leaf anatomy of Setaria s.l. (Poaceae: Panicoideae: Paniceae) and its taxonomic significance
Plant Systematics and Evolution, 2016Co-Authors: Sandra S Aliscioni, Juan C. Ospina, Natalia E. GomizAbstract:Setaria is numerically one of the largest and most taxonomically complex genera of the tribe Paniceae. The currently published phylogenies of Setaria are not fully resolved and some of the resulting clades reveal more geographical signals than morphological affinities. Therefore, external similarities among species of Setaria do not generally indicate relationships, morphology appears to be highly labile, and few inferences can be made regarding the taxonomy of the genus. In the present study we analyze the variation of the foliar anatomy through a cluster analysis including morphological characters used traditionally to delimit subgenera, sections and species. The aim of this study is to examine whether foliar anatomy, a source of evidence not previously utilized, provides useful information and can be predictive for recognizing homogenous groups of species within Setaria . The significance of the characters is evaluated to identify species groups. These groups were compared with infrageneric taxa and monophyletic clades established in previously published molecular phylogenies. Additionally, some foliar anatomical characters associated with the photosynthetic pathway are also discussed and compared with other members of the tribes Paniceae and Paspaleae.
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anatomia ecologica de algunas especies del genero paspalum poaceae panicoideae Paniceae
Darwiniana (Argentina) Num.3-4 Vol.38, 2015Co-Authors: Sandra S AliscioniAbstract:Aliscioni, S. S. 2000. Anatomia ecologica de algunas especies del genero Paspalum(Poaceae, Panicoideae, Paniceae). Darwiniana 38(3-4): 187-207.El genero Paspalum L. presenta un elevado numero de especies, con una amplia variabilidadmorfologica y una extensa distribucion geografica. Sus especies crecen en habitats sumamente diversos,desde ambientes muy humedos o acuaticos, a lugares secos de suelos arcillosos o arenosos, muchas vecessalinos. Dada la diversidad de ambientes en los que puede hallarse Paspalum, se estudiaron lascaracteristicas anatomico-foliares presentes en el genero con la finalidad de interpretar diferentesestrategias adaptativas en distintas especies. Se presenta una descripcion general de la anatomia foliar delgenero y se discuten ciertos caracteres anatomicos, interpretando su posible relacion con las condicionesdel habitat
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revision of old world species of setaria poaceae panicoideae Paniceae
2014Co-Authors: Osvaldo Morrone, Sandra S Aliscioni, Fernando O Zuloaga, Jose Francisco Pensiero, Jan Frits Veldkamp, Elizabeth A. KelloggAbstract:Fil: Morrone, Osvaldo. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Botanica Darwinion. Academia Nacional de Ciencias Exactas, Fisicas y Naturales. Instituto de Botanica Darwinion; Argentina
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Reproductive biology of Setaria magna Griseb. (Poaceae: Panicoideae: Paniceae)
Plant Systematics and Evolution, 2011Co-Authors: Sandra S Aliscioni, Natalia E. Gomiz, Juan P. Torretta, José F. PensieroAbstract:The genus Setaria is economically important because many species are cultivated for grains or forage. Setaria magna is an American species, native to North America and introduced in South America. The morphological aspect of this species is similar to S. italica (foxtail millet), suggesting its potential value as a crop. The purpose of this work was to understand the breeding system (self-pollination vs. open pollination) of S. magna ; additionally, the floral development was described. The results of the breeding system analysis indicated that S. magna is mainly autogamous and does not appear to have a self-incompatibility mechanism. The floral development observed was similar to that described for other Paniceae; in most of the spikelets only the upper anthecium developed fruit, but a small number of spikelets presented bisexual lower florets. These spikelets produced two caryopses per spikelet. Thus, S. magna can produced two types of dispersal units; a few whitish naked caryopses from the lower anthecium that fall without their lemma and palea at maturity; and a high number of brown caryopses protected by the lemma and palea from the upper anthecium. The presence of a normal embryo sac in the upper anthecium suggests that S. magna would present normal sexual reproduction, although we can not reject the formation of apomitic seeds in the lower anthecium.
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oncorachis and sclerochlamys two new segregated genera from streptostachys poaceae panicoideae Paniceae a revision based on molecular morphological and anatomical characters
Taxon, 2009Co-Authors: Silvana M. Sede, Osvaldo Morrone, Liliana M. Giussani, Sandra S Aliscioni, Fernando O. ZuloagaAbstract:Generic boundaries of the South American genus Streptostachys (five species) are explored and compared with allied genera of the tribe Paniceae. On the basis of morphological, anatomical and molecular characters two new genera are proposed, Oncorachis based on Streptostachys macrantha and S. ramosa, and Sclerochlamys for Streptostachys rigidifolia. The phylogenetic position of the new genera and Streptostachys within Paniceae is evaluated.
Olmi L. - One of the best experts on this subject based on the ideXlab platform.
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Cereali selvatici a Takarkori, sito del Tadrart Acacus - Sahara Libico: schede di alcuni macroresti da uno spot dell’Olocene Medio.
2007Co-Authors: Olmi L., Buldrini F., Mariotti Lippi M., Di Lernia S., Massamba N’, Mercuri A. M.Abstract:Il lavoro presenta una serie di tavole descrittive di alcuni reperti mummificati di Paniceae provenienti dal riparo sotto roccia di Takarkori. Il sito archeologico \ue8 ubicato nell\u2019area pi\uf9 meridionale del Tadrart Acacus libico, un massiccio montuoso del Sahara Centrale, al confine tra Libia e Algeria sud-occidentale. Le schede realizzate, utili per le determinazioni nelle future analisi archeobotaniche nell\u2019area, si riferiscono a 6 generi/specie di Paniceae, che includono tra l\u2019altro cereali selvatici ancor oggi raccolti in aree sahariane e saheliane: Echinochloa colona, Panicum sp., Dactyloctenium aegyptium, Urochloa panicoides, Brachiaria sp., e B. leersioides
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Cereali selvatici a Takarkori, sito del Tadrart Acacus – Sahara libico: schede di alcuni macroresti da uno spot dell’Olocene medio.
Modena : [s. n.] 1997-, 2006Co-Authors: Olmi L., Massamba N’siala, Buldrini F., Mariotti Lippi M., Di Lernia S., Mercuri A.m.Abstract:Il lavoro presenta una serie di tavole descrittive di alcuni reperti mummificati di Paniceae provenienti dal riparo sotto roccia di Takarkori. Il sito archeologico è ubicato nell’area più meridionale del Tadrart Acacus libico, un massiccio montuoso del Sahara centrale, al confine tra Libia e Algeria sudoccidentale. Le schede realizzate, utili per le determinazioni nelle future analisi archeobotaniche nell’area, si riferiscono a sei generi/specie di Paniceae, che includono tra l’altro cereali selvatici ancora oggi raccolti in aree sahariane e saheliane: Echinochloa colona, Panicum sp., Dactyloctenium aegyptium, Urochloa panicoides, Brachiaria sp., e B. leersioides
Mercuri A.m. - One of the best experts on this subject based on the ideXlab platform.
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Cereali selvatici a Takarkori, sito del Tadrart Acacus – Sahara libico: schede di alcuni macroresti da uno spot dell’Olocene medio.
Modena : [s. n.] 1997-, 2006Co-Authors: Olmi L., Massamba N’siala, Buldrini F., Mariotti Lippi M., Di Lernia S., Mercuri A.m.Abstract:Il lavoro presenta una serie di tavole descrittive di alcuni reperti mummificati di Paniceae provenienti dal riparo sotto roccia di Takarkori. Il sito archeologico è ubicato nell’area più meridionale del Tadrart Acacus libico, un massiccio montuoso del Sahara centrale, al confine tra Libia e Algeria sudoccidentale. Le schede realizzate, utili per le determinazioni nelle future analisi archeobotaniche nell’area, si riferiscono a sei generi/specie di Paniceae, che includono tra l’altro cereali selvatici ancora oggi raccolti in aree sahariane e saheliane: Echinochloa colona, Panicum sp., Dactyloctenium aegyptium, Urochloa panicoides, Brachiaria sp., e B. leersioides
