Artículos de revistas
Karyotypes of some species of Cestrum, Sessea, and Vestia (tribe Cestreae, Solanaceae)
Fecha
2006-12Registro en:
Las Peñas, Maria Laura; Chiarini, Franco Ezequiel; Bernardello, Gabriel Luis Mario; Benitez de Rojas, Carmen; Karyotypes of some species of Cestrum, Sessea, and Vestia (tribe Cestreae, Solanaceae); Univ Florence Botany Inst; Caryologia; 59; 2; 12-2006; 131-137
0008-7114
2165-5391
CONICET Digital
CONICET
Autor
Las Peñas, Maria Laura
Chiarini, Franco Ezequiel
Bernardello, Gabriel Luis Mario
Benitez de Rojas, Carmen
Resumen
The somatic chromosomes of Cestrum bigibbosum Pittier, C. buxifolium Kunth, Sessea corymbosa Goudot ex Taylor and Phillips and Vestia foetida (Ruiz et Pav.) Hoffmanns, were examined by classical staining. The number 2n = 2x = 16 was found for all species. The total genome length ranged from 57.70 to 92.09 μm and the average chromosome length from 7.21 to 11.51 μm. Karyotypes were notably symmetrical. Haploid karyotype formulae were 8 m pairs (C. bigibbosum, V. foetida) or 7 m + 1 sm pairs (S. corymbiflora, C. buxifolium). Except Sessea corymbiflora in which satellites were not visualized, the remaining species showed one satellited pair. The species can be distinguished by a combination of karyotype formula, karyotype length, and the position of satellites in a particular chromosome pair. Karyotype diversification in tribe Cestreae is suggested to have been accompanied by a tendency towards slight asymmetry and increased genome length.