Consulta: creatorFacets:"Alves,Marccus Vinícius"
Registros recuperados: 3
Data/hora: 02/06/2024 01:19:46

Checklist das espécies de Euphorbiaceae Juss. ocorrentes no semi-árido pernambucano, Brasil
Provedor de dados: 39
Autores: Alves,Marccus Vinícius.
É apresentado o check-list das Euphorbiaceae da região semi-árida do Estado de Pernambuco (zona da Caatinga, subzonas do Agreste e do Sertão), nordeste do Brasil. Foram estudados os materiais oriundos das coletas realizadas durante os anos de 1997-1999 e aqueles depositados nos Herbários locais (IRA, PEUFR, TASH e UFP). Foram registradas 89 espécies, distribuídas em 22 gêneros, sendo Croton L., Cnidoscolus Pohl, Dalecliampia Plum, ex L., Euphorbia L. e Phyllanthus L. os melhor representados, com 21, 7, 6, 6 e 6 táxons, respectivamente. Caperonia castanefolia A. St.-Hil, Euphorbia phosphorea Mart, e Rotnanoa tamnoides (A. Juss.) Radcl.-Sm. são novas citações para a flora pernambucana.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Euphorbiaceae; Semiárido; Pernambuco; Brasil.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061998000400016

Evidence of genetic differentiation and karyotype evolution of the sedges Cyperus ligularis L. and C. odoratus L. (Cyperaceae)
Provedor de dados: 39
Autores: Cruz,Geyner Alves dos Santos; Vasconcelos,Santelmo; Pinangé,Diego Sotero de Barros; Gonçalves-Oliveira,Rodrigo Cesar; Alves,Marccus Vinícius; Torres,Rodrigo Augusto; Benko-Iseppon,Ana Maria.
ABSTRACT The taxonomy of Cyperaceae is complex, with genera like Cyperus harboring species complexes. We analyzed the genetic similarity between Cyperus ligularis L. and C. odoratus L. based on DNA fingerprinting and cytogenetics. Significative genetic differentiation (G ST = 0.363) and low gene flow (N  m = 0.877) indicated a clear genetic distinction between the two species. Moreover, the clustering analysis showed two distinct genetic groups, suggesting a lack of evidence for hybridization. The phenogram revealed two different lineages, and although all individuals of C. odoratus were collected from plots close to each other, they possessed greater genetic diversity than that observed among individuals of C. ligularis, which were sampled over a wider...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agmatoploidy; DNA amplification fingerprinting; Gene flow; Genetic differentiation; Hybridization.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200264

Arbuscular mycorrhiza in species of Commelinidae (Liliopsida) in the state of Pernambuco (Brazil)
Provedor de dados: 39
Autores: Silva,Gladstone Alves da; Santos,Bartolomeu Acioli dos; Alves,Marccus Vinícius; Maia,Leonor Costa.
Mycorrhiza are a mutualistic symbiosis between fungi and plant roots, the main benefit to the plant being increased nutrient uptake. The arbuscular is the most important kind of mycorrhiza for agriculture and it is widespread in occurrence and distribution in most ecosystems. The aim of this work was to study the mycorrhizal status of the species of Commelinidae that occur in the State of Pernambuco. Plant roots, collected in ten municipalities, were washed, cleared in KOH, stained with Trypan blue in lactoglycerol and observed under a light microscope in order to assess presence and identification of the mycorrhizal type. Percentage of root colonization was evaluated by the gridline intersect method. Forty specimens representing 30 species were observed....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyperaceae; Eriocaulaceae; Poaceae; Mycorrhizal fungi; Symbiosis.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062001000200002