Consulta: creatorFacets:"Valls,José F.M."
Registros recuperados: 3
Data/hora: 02/06/2024 05:15:39

Chromosome number in Brazilian germplasm accessions of Paspalum hydrophilum, P. modestum and P. palustre (Gramineae; Paniceae)
Provedor de dados: Genetics and Molecular Biology
Autores: Pozzobon,Marisa T.; Valls,José F.M.
This paper compiles results of chromosome counts of Paspalum hydrophilum, P. modestum and P. palustre. Four Brazilian accessions of P. modestum have shown 2n = 2x = 20 chromosomes, a number already found in one accession from Argentina and in two from Brazil. Three other Brazilian accessions showed tetraploid level (2n = 4x = 40), which was previously unknown in this species. In P. hydrophilum, only one of the accessions analyzed presented tetraploid level, initially established for the species from plants collected in Argentina. Five additional accessions from Brazil showed the diploid number, previously detected in a single Brazilian population. A tetraploid cytotype was found in P. palustre, previously known as a diploid species. In addition to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grass; Ploidy level; Paspalum hydrophilum; P. modestum; P. palustre.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000300023

Mode of reproduction of Brazilian species of Adesmia (Leguminosae)
Provedor de dados: Genetics and Molecular Biology
Autores: Tedesco,Solange B.; Dall'Agnol,Miguel; Schifino-Wittmann,Maria Teresa; Valls,José F.M.
Mode of reproduction was studied in 15 species of Adesmia DC. (Leguminosae). In six species, three treatments were used: mutual pollination, mechanical stimulation and control. Fifty-four plants of these six species were grown in a greenhouse, individually isolated in nylon screen boxes. Flowers were labelled and submitted to the different treatments. In addition, the frequency of spontaneous self-pollination in the absence of pollinators was studied in 200 plants of nine other species. These 200 plants were kept in a greenhouse, which avoided contact with any possible pollinator. Adesmia bicolor, A. muricata, A. punctata and A. riograndensis produced seed both by cross- and self-pollination. Adesmia punctata and A. riograndensis need mechanical...
Tipo: Info:eu-repo/semantics/other
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000200038

Confirmação da ocorrência do gênero Oplismenopsis (Poaceae) no Brasil
Provedor de dados: Revista Brasileira de Botânica
Autores: Guglieri,Adriana; Boldrini,Ilsi Iob; Valls,José F.M.
A ocorrência de Oplismenopsis Parodi é documentada no Brasil, com base em coletas realizadas no Estado do Rio Grande do Sul. O trabalho apresenta a descrição e dados referentes à distribuição geográfica, preferências ambientais e fenologia de sua única espécie, Oplismenopsis najada (Hack. &amp;amp; Arechav.) Parodi, agora formalmente incorporada à flora brasileira, como espécie nativa.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brasil; Flora; Gramineae; Oplismenopsis; Rio Grande do Sul.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000100016