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Article . 2013 . Peer-reviewed
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Cariotipo de Espeletiopsis muiska

Authors: Rondón B, Héctor; Rache C, Leidy; Pacheco M, José;

Cariotipo de Espeletiopsis muiska

Abstract

RESUMENObjetivo. Estudiar el ciclo celular y realizar la descripción cromosómica de Espeletiopsis muiska, utilizando células meristemáticas de ápices radicales obtenidos a través de cultivo in vitro de embriones en medio MS suplementado con AIB. Materiales y métodos. Se colectaron ápices radicales a diferentes horas del día y se contaron en ellos las células presentes en cada fase mitótica, se determinó la duración del ciclo celular y la hora de mayor actividad mitótica. La descripción de los cromosomas y la elaboración del cariotipo de la especie, se realizó utilizando un protocolo que permitió la obtención de cromosomas metafásicos. Resultados. Respecto a la duración del ciclo celular, se encontró que la interfase comprende el 94.65% y la mitosis el 5.35% del total del ciclo celular. Entre las fases mitóticas la profase tiene mayor duración, 1.92%, mientras que la anafase es la más corta, 0.96%. En cuanto a la hora mitótica, las células meristemáticas de los ápices radicales presentaron mayor actividad entre las 10:30 y las 11:15. Con el estudio citogenético se encontraron 19 pares de cromosomas con longitudes e índices centroméricos similares y cariotipo asimétrico. Conclusiones. El estudio detallado de los cromosomas, permitió determinar un complemento cromosómico 2n=38+2B, dos cromosomas con microsatélites terminales y uno con constricción secundaria.

Keywords

mitosis, roots, Cromosomas, páramo, Chromosomes; mitosis; moorland; roots, Chromosomes, moorland, raíces

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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