Services on Demand
Journal
Article
Indicators
- Cited by SciELO
Related links
- Similars in SciELO
- uBio
Share
Boletín de la Sociedad Argentina de Botánica
On-line version ISSN 1851-2372
Abstract
DELBON, Natalia; BERNARDELLO, Gabriel; TERESA COSA, María and STIEFKENS, Laura. Estudios Cariotípicos en Flourensia (Asteraceae) de Argentina. Bol. Soc. Argent. Bot. [online]. 2014, vol.49, n.2, pp.247-255. ISSN 1851-2372.
Twelve species of the American genus Flourensia DC. inhabit Argentina. Six of them grow in its central region, all endemic to it. Chromosomal number is known for most species, but no karyotypic studies have been done. Therefore, we studied the mitotic chromosomes of the six Central Argentinean species, performing qualitative and quantitative analysis of their karyotypes. Permanent mounts were made from root tips with classical techniques. All species had 2n=36: three with 14 m+ 4 sm pairs and the remaining with 12 m+ 6 sm pairs. The average chromosome length varied between 2.11 and 2.97 mm. Statistical differences were found for the variables C, Lt, R, and A1. Except for F. campestris, one or two pairs of satellites which varied in their location were found. The data obtained have taxonomic value since differences were found among nearly all species, suggesting that their speciation would have been accompanied by small chromosomal changes caused by inversions and/or translocations.
Keywords : Central Argentina; Asteraceae; Karyotype; Cytogenetics; Flourensia; Chromosome number.