Cytogenetics, genome size and anther anatomy in Bulbostylis (Cyperaceae)

Cyperaceae display diverse and unusual cytogenetical characteristics, but are still sparsely documented and poorly understood in this respect. Six new chromosome counts are presented for Bulbostylis. Absolute DNA content was close to 1 pg in all species and was independent from chromosome number. De...

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Autores principales: López, María Gabriela, Fernández, Aveliano, Galdeano, Florencia
Formato: Artículo
Lenguaje:Inglés
Publicado: Firenze University Press 2021
Materias:
Bulbostylis
Holokinetic
Chromosomes
Agmatoploidy
Symploidy
Pseudomonads
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/27751
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-27751
record_format dspace
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Bulbostylis
Holokinetic
Chromosomes
Agmatoploidy
Symploidy
Pseudomonads
spellingShingle Bulbostylis
Holokinetic
Chromosomes
Agmatoploidy
Symploidy
Pseudomonads
López, María Gabriela
Fernández, Aveliano
Galdeano, Florencia
Cytogenetics, genome size and anther anatomy in Bulbostylis (Cyperaceae)
topic_facet Bulbostylis
Holokinetic
Chromosomes
Agmatoploidy
Symploidy
Pseudomonads
description Cyperaceae display diverse and unusual cytogenetical characteristics, but are still sparsely documented and poorly understood in this respect. Six new chromosome counts are presented for Bulbostylis. Absolute DNA content was close to 1 pg in all species and was independent from chromosome number. Despite variations in chromosome number from 2n = 30 to 2n = 102, DNA content only varied from 0.932 pg to 1.198 pg. The studies presented in this work showed that species possess holokinetic chromosomes. The size of stomata and pollen grains did not vary. These results would confirm that the chromosome evolution of these species was via agmatoploidy and symploidy rather than by polyploidy. Abnormalities during meiotic spindle formation in microsporogenesis followed by simultaneous cytokinesis resulted in four microspores, of which only one was functional, resulting in a pseudomonad maturing into pollen grains with the usual vegetative and generative nuclei in addition to three degenerated microspore nuclei.
format Artículo
author López, María Gabriela
Fernández, Aveliano
Galdeano, Florencia
author_facet López, María Gabriela
Fernández, Aveliano
Galdeano, Florencia
author_sort López, María Gabriela
title Cytogenetics, genome size and anther anatomy in Bulbostylis (Cyperaceae)
title_short Cytogenetics, genome size and anther anatomy in Bulbostylis (Cyperaceae)
title_full Cytogenetics, genome size and anther anatomy in Bulbostylis (Cyperaceae)
title_fullStr Cytogenetics, genome size and anther anatomy in Bulbostylis (Cyperaceae)
title_full_unstemmed Cytogenetics, genome size and anther anatomy in Bulbostylis (Cyperaceae)
title_sort cytogenetics, genome size and anther anatomy in bulbostylis (cyperaceae)
publisher Firenze University Press
publishDate 2021
url http://repositorio.unne.edu.ar/handle/123456789/27751
work_keys_str_mv AT lopezmariagabriela cytogeneticsgenomesizeandantheranatomyinbulbostyliscyperaceae
AT fernandezaveliano cytogeneticsgenomesizeandantheranatomyinbulbostyliscyperaceae
AT galdeanoflorencia cytogeneticsgenomesizeandantheranatomyinbulbostyliscyperaceae
bdutipo_str Repositorios
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