"Blechnum occidentale" (Blechnaceae-Polypodiopsida)desarrollo de los leptosporangios y un nuevo poliploide de la especie para el Noroeste de la Argentina

  1. González, Graciela E. 1
  2. Prada, Carmen 2
  3. Rolleri, Cristina H. 3
  1. 1 Departamento de Ecología, Genética y Evolución (LACYE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (Argentina)
  2. 2 Departamento de Biología Vegetal I, Facultad de Ciencias Biológicas, Universidad Complutense, Ciudad Universitaria, 28040 Madrid (España)
  3. 3 Laboratorio de Estudios de Anatomía Vegetal Evolutiva y Sistemática (LEAVES), Facultad de Ciencias Naturales y Museo de La Plata 64 entre 120 y diagonal 113, B1904 DZB, La Plata (Argentina)
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Journal:
Botanica complutensis

ISSN: 0214-4565

Year of publication: 2016

Issue: 40

Pages: 53-61

Type: Article

DOI: 10.5209/BOCM.53199 DIALNET GOOGLE SCHOLAR lock_openOpen access editor

More publications in: Botanica complutensis

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Abstract

A detailed cytological study of the spore mother cells of specimens of B. occidentale collected in locations from the northwest of the Argentina was carried out here. The results of this contribution allowed to report a new polyploid, in this case a hexaploid, whose most probably basic number was considered x = 31, and which origin is analyzed and discussed. The study suggests an allopolyploid origin of this new cytotype which would be a product of interspecific hybridization and later chromosomal duplication. In the course of the study a notable stability was observed in the sporangial characters that are considered to be diagnostic at the specific level, and independent from the ploidy.

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