Análise morfométrica e variabilidade morfológica em populações de Syngonanthus nitens (Bong.) Ruhland (Eriocaulaceae) / Morfometric analysis and morphological variability in populations of Syngonanthus nitens (Bong.) Ruhland (Eriocaulaceae)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Syngonanthus nitens (Bong.) Ruhland (common name "Golden Grass") is a widespread distributed species in Brazil. The handcrafts are made from scape of S. nitens, which are bright and gold in color. The identity of this taxon has been questionable, since plants with very different morphological patterns are identified as belonging to the same species. These individuals can occur in different populations, from distant parts of the country, and within sympatric populations, especially in Jalapão. In order to investigate this taxonomic problem, we analyzed 23 morphological characters in 16 populations. The analyses aimed to assess the morphological variability of the specimens in the Jalapão region (Central Brazil), in Goiás state and in the Range of Espinhaço. For morphometric analyses, we used cluster analysis (Unweighted Pair Group Method with Arithmetic Mean - UPGMA) and ordination (Principal Component Analysis - PCA and Discriminant Function - DF). When only individuals collected in Jalapão were evaluated, the results showed two very different groups, which where separated by size factor. In subsequent analyses, principally those involving almost all populations collected, we observed continuity and overlap between the morphological patterns. We did not identify isolated groups or any obvious correlation with geographical distribution. Although all characters had been informative to classify the individuals in their populations of origin, the non-floral characters were more informative than the flower traits. These results, together with the analyses of herbarium material and the specific literature, allowed to recognize this complex as the only one species, S. nitens, without infra-specific delimitations.

ASSUNTO(S)

morphometric analysis eriocaulaceae populations estudo populacional eriocaulaceae morfometria

ACESSO AO ARTIGO

Documentos Relacionados