Flora da Serra do Cipó, Minas Gerais: Amaryllidaceae

Neste trabalho são apresentadas as espécies de Amaryllidaceae da Serra do Cipó, Minas Gerais, Brazil. Amaryllidaceae é representada na área por 4 espécies pertencentes a 3 gêneros: Habranthus datensis Ravenna, Hippeastrum glaucescens (Mart.) Herb., H. puniceum (Lam.) Kuntze e Rhodophiala cipoana Ravenna. São apresentados chave para os gêneros e espécies, descrições, ilustrações e comentários.This work presents the species of Amaryllidaceae of the Serra do Cipó, Minas Gerais state, Brazil. Amaryllidaceae is represented in the area by 4 species of 3 genera: Habranthus datensis Ravenna, Hippeastrum glaucescens (Mart.) Herb., H. puniceum (Lam.) Kuntze and Rhodophiala cipoana Ravenna. A key to the genera and species, descriptions, illustrations and comments are provided

Variação cromossômica numérica intrapopulacional em Zephyranthes sylvatica Baker (Amaryllidaceae: Hippeastreae) no Nordeste do Brasil

Zephyranthes Herb. is a taxonomically complex and cytologically variable group, with about 65 species of Neotropical distribution. Chromosome number variability in 32 individuals of a Zephyranthes sylvatica population from Northeast Brazil was investigated. Three cytotypes were found: 2n = 12 (one metacentric, four submetacentric and one acrocentric pairs), in 24 individuals; 2n = 12 + 1B, in five and three individuals with 2n = 18, a triploid cytotype. All diploid individuals showed chromosomes with polymorphism in pair one and two, while in triploids this polymorphism was observed in all chromosome triplets, generally with two homomorphic chromosomes and a higher or lower heteromorphic chromosome. All individuals had reticulated interfasic nucleus and a slightly asymmetric chromosome complement, with one metacentric chromosome pair and the others more submetacentric to acrocentric. These data confirm the cytological variability previously registered for the genus. Mechanisms involved in karyotypic evolution in this population are discussed.O gênero Zephyranthes Herb. é um grupo taxonômicamente complexo e cariologicamente variável, compreende cerca de 65 espécies de distribuição predominantemente neotropical. O presente trabalho aborda a variabilidade cariológica em um total de 32 indivíduos de Z. sylvatica obtidas em uma única população do Nordeste do Brasil. Todos os indivíduos apresentaram núcleo interfásico reticulado e complemento cromossômico bimodal, pela ocorrência de um par cromossômico metacêntrico e os demais submetacêntricos. Foram observados três citotipos: 2n = 12 (um par metacêntrico, quatro submetacêntricos e um acrocêntricos) em 24 indivíduos; 2n = 12 + 1B, em cinco, além de um citotipo triplóide com 2n = 18 em três indivíduos. Todos os citotipos diplóides exibiram polimorfismo cromossômico para os pares um e dois, enquanto nos triplóides esse mesmo polimorfismo foi observado nas trincas correspondente aos pares cromossômicos diplóides, geralmente com dois cromossomos homórficos e um cromossomo heteromórfico maior que os dois anteriores. Esses dados confirmam a variabilidade cariológica anteriormente registrada para o gênero. São discutidos os mecanismos de evolução cariotípica envolvidos nessa variabilidade.37137

Guidance for creating individual and batch latinized binomial virus species names

The International Committee on Taxonomy of Viruses recently adopted, and is gradually implementing, a binomial naming format for virus species. Although full Latinization of these names remains optional, a standardized nomenclature based on Latinized binomials has the advantage of comparability with all other biological taxonomies. As a language without living native speakers, Latin is more culturally neutral than many contemporary languages, and words built from Latin roots are already widely used in the language of science across the world. Conversion of established species names to Latinized binomials or creation of Latinized binomials de novo may seem daunting, but the rules for name creation are straightforward and can be implemented in a formulaic manner. Here, we describe approaches, strategies and steps for creating Latinized binomials for virus species without prior knowledge of Latin. We also discuss a novel approach to the automated generation of large batches of novel genus and species names. Importantly, conversion to a binomial format does not affect virus names, many of which are created from local languages

A new Hippeastrum (Amaryllidaceae) species from Brazil

The new species Hippeastrum idimaea from Brazil, from the state of Rio de Janeiro, is described, illustrated, cytologically analyzed, and compared with most similar species.Fil: Oliveira, Renata S.. Universidade Estadual Do Campinas. Instituto de Biología; BrasilFil: Urdampilleta, Juan Domingo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; ArgentinaFil: Dutilh, Julie H. A.. Universidade Estadual Do Campinas. Instituto de Biología; Brasi

Investigação do potencial antioxidante e anticolinesterásico de Hippeastrum (Amaryllidaceae) Antioxidant and anticolinesterasic effects of Hippeastrum species (Amaryllidaceae)

<abstract language="eng">Amaryllidaceae family is an important source of bioactive molecules and considering the taxonomic relationships, it is relevant to investigate the genus Hippeastrum. Thus, the aim of this work was to determine antioxidant and anticholinesterasic activities of Hippeastrum morelianum, Hippeastrum psittacinum and Hippeastrum santacatarina. Both antioxidant and acetylcholinesterasic activities of extracts were determinated by bioautography as 10 mg/mL and 0.1 mg/mL, respectively. The antioxidant activity of alkaloid lycorine, determinated spectrophotometrically with DPPH, indicated an IC50 value of 0.326 mM

Intrapopulational chromosome number variation in Zephyranthes sylvatica Baker (Amaryllidaceae: Hippeastreae) from Northeast Brazil

Made available in DSpace on 2011-04-09T20:37:27Z (GMT). No. of bitstreams: 1 OPB1842.pdf: 251136 bytes, checksum: dd7e81fd89673821343f54524d9ba372 (MD5) Previous issue date: 2008-09-03200

Generic classification of amaryllidaceae tribe hippeastreae

A robust generic classification for Amaryllidaceae has remained elusive mainly due to the lack of unequivocal diagnostic characters, a consequence of highly canalized variation and a deeply reticulated evolutionary history. A consensus classification is proposed here, based on recent molecular phylogenetic studies, morphological and cytogenetic variation, and accounting for secondary criteria of classification, such as nomenclatural stability. Using the latest sutribal classification of Hippeastreae (Hippeastrinae and Traubiinae) as a foundation, we propose the recognition of six genera, namely Eremolirion gen. nov., Hippeastrum, Phycella s.l., Rhodolirium s.str., Traubia, and Zephyranthes s.l. A subgeneric classification is suggested for Hippeastrum and Zephyranthes to denote putative subclades. In Hippeastrum, we recognize H. subg. Hippeastrum and H. subg. Tocantinia. In Zephyranthes, Z. subg. Eithea, Z. subg. Habranthus, Z. subg. Myostemma (= core Rhodophiala clade), Z. subg. Neorhodophiala subg. nov., and Z. subg. Zephyranthes are recognized. Descriptions, synonymy, taxonomic keys, and new combinations are provided for each genus and subgenus683481498classification; herb; ; nomenclature; phylogenetics; phytogeography; taxonomy; ; Asparagales; Habranthus; Hippeastrum; Magnoliophyta; Phycella; Rhodophiala; ;We thank the curators of the following herbaria where various Hippeastreae specimens have been consulted by the authors of this article: B, BA, BAA, BM, BR, CONC, CORD, CTES, FLAS, K, LIL, LP, LZ, MCNS, MO, NY, P, PR, SGO, SI, SPF, UEC, W, Z. We are also very grateful to John McNeill for his help with nomenclatural doubts. This research was supported by NSF Doctoral Dissertation Improvement grant DEB-1310839 to PSS and NG, and Conicyt-Fondecyt (Chile) Iniciación Grant nº 11170977 to N

The Brazilian Amaryllidaceae as a source of acetylcholinesterase inhibitory alkaloids

Nine Brazilian Amaryllidaceae species were studied for their alkaloid composition and acetylcholinesterase (AChE) inhibitory activity via GC?MS and a modified Ellman assay, respectively. A total of thirty-six alkaloids were identified in these plants, of which Hippeastrum papilio and H. glaucescens exhibited the highest galanthamine content and the best IC50 values against AChE. Furthermore, Hippeastrum vittatum and Rhodophiala bifida also showed notable AChE inhibitory effects. X-ray crystallographic data for four galanthamine-type compounds revealed significant differences in the orientation of the N-methyl group, which are shown to be related to AChE inhibition.Fil: de Andrade, Jean Paulo. Universidad de Barcelona; España. Universidade Federal do Rio Grande do Sul; Brasil. Universidad del Espiritu Santo; BrasilFil: Giordani, Raquel B.. Universidade Federal do Rio Grande do Sul; BrasilFil: Torras-Claveria, Laura. Universidad de Barcelona; España. Universidad del Espiritu Santo; BrasilFil: Pigni, Natalia Belen. Universidad de Barcelona; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Ciencia y Tecnología de Alimentos Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Ciencia y Tecnología de Alimentos Córdoba; Argentina. Universidade Federal do Rio Grande do Sul; BrasilFil: Berkov, Strahil. Universidad de Barcelona; España. AgroBioInstitute; Bulgaria. Universidad del Espiritu Santo; BrasilFil: Font-Bardia, Mercè. Universidad de Barcelona; EspañaFil: Calvet, Teresa. Universidade Estadual de Campinas; BrasilFil: Konrath, Eduardo Luis. Universidade Federal do Rio Grande do Sul; Brasil. Universidad del Espiritu Santo; BrasilFil: Bueno, Kelly. Universidade Federal do Rio Grande do Sul; BrasilFil: Sachett, Liana G.. Universidade Federal do Rio Grande do Sul; BrasilFil: Dutilh, Julie H.. Universidade Estadual de Campinas; Brasil. Universidad del Espiritu Santo; BrasilFil: de Souza Borges, Warley. Universidad del Espiritu Santo; BrasilFil: Viladomat, Francesc. Universidad de Barcelona; EspañaFil: Henriques, Amelia T.. Universidade Federal do Rio Grande do Sul; BrasilFil: Nair, Jerald J.. Universidad de Barcelona; EspañaFil: Zuanazzi, José Angelo S.. Universidade Federal do Rio Grande do Sul; BrasilFil: Bastida, Jaume. Universidad de Barcelona; Españ