Data/hora: 01/06/2024 01:57:25

Provedor de dados: | 64
País: | Brazil
Título: | Morphology and pollen viability of Lolium multiflorum Lam.
Autores: | Nunes,Renata de Castro; Bustamante,Fernanda de Oliveira; Techio,Vânia Helena; Mittelmann,Andréa.
Data: | 2012-04-01
Ano: | 2012
Palavras-chave: | Scanning electron microscopy; Ryegrass; Acetolysis.
Resumo: | Study and characterization of pollen grains are essential for different areas, especially taxonomy, genetic improvement, phylogeny, and paleobotany. As yet, there are no reports on pollen morphology of genotypes of naturalized Lolium multiflorum Lam., introduced cultivars or breeding populations, diploid or polyploid. Ten genotypes of annual ryegrass (L. multiflorum) were evaluated for the viability of pollen grains using propionic carmine and Alexander's stains, while morphology was assessed by the acetolysis technique. Measures of polar axis (P), equatorial diameter (E), exine thickness, and analysis of pollen grains were obtained by scanning electron microscopy (SEM). All genotypes showed high rate of pollen viability (&gt; 89%) for both stains. There were differences between genotypes in the following quantitative traits: polar axis, equatorial diameter, exine, endexine, ektexine, and P/E ratio. Pollen grains were characterized as small, monoporates, with circular and non-prominent apertures. In addition to helping distinction of pollen grains, morphometric differences can be used later to compare ploidy levels, thus assisting in breeding programs of the species.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000200006
Editor: | Editora da Universidade Federal de Lavras
Relação: | 10.1590/S1413-70542012000200006
Formato: | text/html
Fonte: | Ciência e Agrotecnologia  v.36 n.2 2012
Fonte: | info:eu-repo/semantics/openAccess