INVESTIGADORES
POGGIO Lidia
artículos
Título:
Karyotype studies in Mimosa (Mimosoideae, Leguminosae) from Southern South America and ecological and taxonomic relationships
Autor/es:
MORALES M., A.F. WULFF, R.H. FORTUNATO, L. POGGIO
Revista:
CARYOLOGIA
Editorial:
UNIV FLORENCE BOTANY INST
Referencias:
Lugar: Florencia; Año: 2011 vol. 64 p. 201 - 212
ISSN:
0008-7114
Resumen:
Abstract In this work we studied the chromosome number and karyotype formula of seven species of Mimosa
L. (Mimosoideae, Leguminosae). The chromosome number 2n = 2x = 26 for M. detinens Benth., M. hexandra
M. Micheli, M. ostenii Speg. ex Burkart and M. xanthocentra Mart. var. mansii (Benth.) Barneby are new
records, while the chromosome number 2n = 2x = 26 for M. debilis var. debilis, M. urugüensis Hook. and Arn.
and M. uliginosa Chodat and Hassl. confi rm previous records. Karyotype formulae revealed the existence of
metacentric and submetacentric chromosomes, and the chromosomal asymmetry indexes did not show signifi -
cant differences between taxa. The chromosome length of xerophilous and endemic M. detinens and M. ostenii
differed from the rest of species, indicating that this parameter could have taxonomic value. In addition, the
relationship between total chromosome length and climatic parameters showed that diploid species of marginal
areas of distribution have a larger chromosome size, and that this could be related with mechanisms of ecological
adaptation.