LEVANTAMENTO FLORÍSTICO PRELIMINAR DA CAATINGA SUBLITORÂNEA NA PARAÍBA, NORDESTE DO BRASIL

Os estudos florísticos realizados no Agreste, área de transição entre os biomas Caatinga e Mata Atlântica, vêm sendo melhor discutidos recentemente. Entretanto são necessários novos estudos que envolvam uma maior amplitude das áreas limítrofes destes biomas, especialmente no que se refere às Florestas Estacionais Deciduais de Terras Baixas. Nesta concepção, o referente trabalho apresenta um levantamento florístico preliminar realizado no Agreste Sublitorâneo, bem como aponta as similaridades e diferenças entre esta formação e a Caatinga interiorana, a Mata Atlântica litorânea e o Agreste da Borborema. Foram registradas 231 espécies de Angiospermas, sendo Fabaceae, com 46 espécies, e Bignoniaceae, com 15 espécies, as famílias mais representativas na região. A estrutura florística do Agreste Sublitorâneo se assemelha as descritas em levantamentos realizados no Agreste da Borborema. Entretanto, diversas espécies amplamente distribuídas na Caatinga, que também ocorrem no Agreste da Borborema não ocorrem nas Florestas Estacionais Deciduais de Terras Baixas da Paraíba, sugerindo que a diferença de altitude entre a Depressão Sublitorânea e o Planalto da Borborema pode atuar como barreira de isolamento, impedindo que estas espécies se dispersem pela Caatinga Sublitorâne

IAPT chromosome data 31

Marhold, Karol. Slovak Academy of Sciences. Institute of Botany. Science and Biodiversity Centre. Bratislava, Slovak Republic.Kučera, Jaromír. Slovak Academy of Sciences. Institute of Botany. Science and Biodiversity Centre. Bratislava, Slovak Republic.Melo, Camila Aguiar. Universidade Federal do Rio Grande do Sul. Instituto de Biociências. Programa de Pós-Graduação em Genética e Biologia Molecular. Porto Alegre, RS, Brazil.Almeida, Erton Mendonça de. Federal University of Paraíba. Department of Biological Sciences. Areia, Paraíba, Brazil.Alves, Lânia Isis Ferreira. Instituto Nacional do Semi Árido (INSA). Campina Grande, Paraíba, Brazil.An’kova, Tatyana V. Central Siberian Botanical Garden SB RAS. Zolotodolinskaya Str. Novosibirsk, Russia.Bered, Fernanda. Universidade Federal do Rio Grande do Sul. Programa de Pós-Graduação em Genética e Biologia Molecular. Instituto de Biociências. Porto Alegre, RS, Brazil.Rua, Gabriel Hugo. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Recursos Naturales y Ambiente. Cátedra de Botánica Sistemática. Buenos Aires, Argentina.1374-1380IAPT Chromosome Data is a regular column in Taxon that publishes vouchered chromosome counts and ploidy level estimates, providing that the contributions fulfil some basic quality requirements

Assembling the puzzle: Complete chloroplast genome sequences of Discocactus bahiensis Britton & Rose and Melocactus ernestii Vaupel (Cactaceae) and their evolutionary significance

Discocactus and Melocactus are representatives of Core Cactoideae II BCT clade (Browningieae, Cereeae and Trichocereeae clade) and consist of 14 and 50 species, respectively. Both genera occur in South America, but Melocactus distribution extends through Central America and the West Indies. Although the Cactaceae family stands out for having highly rearranged plastomes, with particular gene organization, small or divergent inverted repeats (IRs) and IR loss, the plastome variation in the BCT clade is unknown. In this study, we assembled plastomes of Discocactus bahiensis and Melocactus ernestii and compared them with other available plastomes of Cactoideae (Carnegiea gigantea, and species of the genera Mammillaria and Rhipsalis) as well as with canonical plastomes of members of the order Caryophyllales (Portulaca oleracea and Spinacea oleracea). The plastomes of D. bahiensis (128,733-bp) and M. ernestii (130,703-bp) showed a quadripartite structure with 17 rearrangements when compared to those of P. oleracea and S. oleracea. Thus, twenty-eight genes were transferred from the LSC (large single copy) region to the IRs and 12 genes from the IRs to the LSC or SSC (small single copy) regions. Twenty-seven syntenic blocks were identified, evidencing a large number of rearrangements within the subfamily Cactoideae. These rearrangements could not be explained by the absence of IR regions nor the number of repeats. By comparing plastomes of D. bahiensis and M. ernestii, we propose new regions for phylogenetic inferences for the subfamily Cactoideae, for Discocactus and Melocactus, and for related groups.Fil: de Almeida, Erton Mendonça. Universidade Federal de Pernambuco; BrasilFil: Sader, Mariela Analía. Universidade Federal de Pernambuco; Brasil. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación en Ciencias Veterinarias y Agronómicas. Instituto de Fitopatología y Fisiología Vegetal; ArgentinaFil: Rodriguez, Pablo Emanuel. Universidade Federal de Pernambuco; BrasilFil: Loeuille, Benoit. Universidade Federal de Pernambuco; Brasil. Royal Botanic Gardens; Reino UnidoFil: Felix, Leonardo P.. Universidade Federal de Pernambuco; BrasilFil: Pedrosa-Harand, Andrea. Universidade Federal de Pernambuco; Brasi

Chromosomal evolution in Pleurothallidinae (Orchidaceae: Epidendroideae) with an emphasis on the genus Acianthera: chromosome numbers and heterochromatin

In this study, we analysed chromosome number variation and chromomycin A(3)/4,6-diamidino-2-phenylindole (CMA/DAPI) banding patterns in 48 species belonging to 12 genera of subtribe Pleurothallidinae (Orchidaceae) in order to understand the chromosome evolution based on recent phylogenetic hypotheses and taxonomic treatments. All species had small chromosomes, with numbers ranging from 2n=20 in two Specklinia spp. to 2n=80 in an unidentified Octomeria sp. In Acianthera, the most highly represented genus in this study, a great diversity of chromosome number and pattern of fluorescent bands was observed, showing heterochromatin accumulation in Acianthera section Sicariae subsection Pectinatae. Interspecific ascending and, mainly, descending dysploidy were the main mechanisms of chromosome number evolution in subtribe Pleurothallidinae. For Pleurothallidinae, x=20 is suggested as the basic chromosome number, the same suggested for the related subtribe Laeliinae and for the whole tribe Epidendreae. The Brazilian species of the mega-genus Stelis had chromosomes with small amounts of heterochromatin and chromosome numbers based on x(2)=16. These are generally divergent from those reported for Andean and Meso-American species, but in agreement with the monophyletic hypothesis proposed for Stelis spp. with a Brazilian Atlantic distribution.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

Phenotypic RDAs-data

Data used to test associations of phenotypic variation with geography and climate by means of RDA and pRDA

Floral tube length variation-data

Data used to test associations of flower variation with geography, pollinators and climate by means of linear mixed-effect models (LMEs).

Geographic locations of sampling sites

Geographic coordinates in decimal degrees of the sampling locations

Genetic RDAs-data

Data used to test associations of genetic variation with geography and climate by means of RDA and pRDA

Chromosomal evolution in Pleurothallidinae (Orchidaceae: Epidendroideae) with an emphasis on the genus Acianthera

In this study, we analysed chromosome number variation and chromomycin A(3)/4,6-diamidino-2-phenylindole (CMA/DAPI) banding patterns in 48 species belonging to 12 genera of subtribe Pleurothallidinae (Orchidaceae) in order to understand the chromosome evolution based on recent phylogenetic hypotheses and taxonomic treatments. All species had small chromosomes, with numbers ranging from 2n=20 in two Specklinia spp. to 2n=80 in an unidentified Octomeria sp. In Acianthera, the most highly represented genus in this study, a great diversity of chromosome number and pattern of fluorescent bands was observed, showing heterochromatin accumulation in Acianthera section Sicariae subsection Pectinatae. Interspecific ascending and, mainly, descending dysploidy were the main mechanisms of chromosome number evolution in subtribe Pleurothallidinae. For Pleurothallidinae, x=20 is suggested as the basic chromosome number, the same suggested for the related subtribe Laeliinae and for the whole tribe Epidendreae. The Brazilian species of the mega-genus Stelis had chromosomes with small amounts of heterochromatin and chromosome numbers based on x(2)=16. These are generally divergent from those reported for Andean and Meso-American species, but in agreement with the monophyletic hypothesis proposed for Stelis spp. with a Brazilian Atlantic distribution.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP