LA IDENTIDAD DE VERNONIA SETOSOSQUAMOSA (ASTERACEAE, VERNONIEAE): EVIDENCIAS CROMOSÓMICAS Y PALINOLÓGICAS
| Autor: | María Betiana Angulo, Massimiliano Dematteis |
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| Jazyk: | English<br />Spanish; Castilian |
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Darwiniana, Vol 48, Iss 1, Pp 17-24 (2010) |
| Druh dokumentu: | article |
| ISSN: | 0011-6793 1850-1702 |
| Popis: | Vernonia setososquamosa (Asteraceae, Vernonieae) has been considered by several authors as a synonym of V. remotiflora, as a variety of this taxon or a quite different, independent species. We analyzed chromosome and pollen morphology of both entities looking for information to clarify the status of V. setososquamosa. The latter taxon showed a somatic chromosome number of 2n=2x=30 with the karyotype composed of 22m + 6sm + 2st, while on the other hand V. remotiflora presented 2n=2x=28 and a karyotype formula having 22m + 4sm + 2st. The pollen of both entities was tricolporate, echinolophate, with lacunae disposed in a regular pattern; however, V. setososquamosa presented polar lacunae, whereas V. remotiflora did not. The results support the treatment of V. setososquamosa and V. remotiflora as different species. |
| Databáze: | Directory of Open Access Journals |
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