Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae)

Cytogenetic characterization and determination of DNA content by flow cytometry of five species of Mecardonia Ruiz et Pavon, 1798 (Gratiolae, Plantaginaceae) was performed. This is the first study of nuclear DNA content carried out in the genus. Mitotic analysis revealed a base chromosome number x =...

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Autores principales:	Sosa, M.M., Angulo, M.B., Greppi, J.A., Bugallo, V.
Formato:	JOUR
Materias:	Chromosome number DNA content Flow cytometry Gratiolae Polyploidy
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_19930771_v10_n4_p769_Sosa
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_19930771_v10_n4_p769_Sosa
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spelling	todo:paper_19930771_v10_n4_p769_Sosa2023-10-03T16:37:31Z Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae) Sosa, M.M. Angulo, M.B. Greppi, J.A. Bugallo, V. Chromosome number DNA content Flow cytometry Gratiolae Polyploidy Cytogenetic characterization and determination of DNA content by flow cytometry of five species of Mecardonia Ruiz et Pavon, 1798 (Gratiolae, Plantaginaceae) was performed. This is the first study of nuclear DNA content carried out in the genus. Mitotic analysis revealed a base chromosome number x = 11 for all entities and different ploidy levels, ranging from diploid (2n = 2x = 22) to hexaploid (2n = 6x = 66). The results include the first report of the chromosome numbers for M. flagellaris (Chamisso & Schlechtendal, 1827) (2n = 22), M. grandiflora (Bentham) Pennell, 1946 (2n = 22), M. kamogawae Greppi & Hagiwara, 2011 (2n = 66), and Mecardonia sp. (2n = 44). The three ploidy levels here reported suggest that polyploidy is common in Mecardonia and appear to be an important factor in the evolution of this genus. The 2C- and 1Cx-values were also estimated in all the species. The 2C-values ranged from 1.91 to 5.29 pg. The 1Cx-values ranged from 0.88 to 1.03 pg. The general tendency indicated a decrease in the 1Cx-value with increasing ploidy level. The significance of the results is discussed in relation to taxonomy of the genus. © María M. Sosa et al. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_19930771_v10_n4_p769_Sosa
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Chromosome number DNA content Flow cytometry Gratiolae Polyploidy
spellingShingle	Chromosome number DNA content Flow cytometry Gratiolae Polyploidy Sosa, M.M. Angulo, M.B. Greppi, J.A. Bugallo, V. Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae)
topic_facet	Chromosome number DNA content Flow cytometry Gratiolae Polyploidy
description	Cytogenetic characterization and determination of DNA content by flow cytometry of five species of Mecardonia Ruiz et Pavon, 1798 (Gratiolae, Plantaginaceae) was performed. This is the first study of nuclear DNA content carried out in the genus. Mitotic analysis revealed a base chromosome number x = 11 for all entities and different ploidy levels, ranging from diploid (2n = 2x = 22) to hexaploid (2n = 6x = 66). The results include the first report of the chromosome numbers for M. flagellaris (Chamisso & Schlechtendal, 1827) (2n = 22), M. grandiflora (Bentham) Pennell, 1946 (2n = 22), M. kamogawae Greppi & Hagiwara, 2011 (2n = 66), and Mecardonia sp. (2n = 44). The three ploidy levels here reported suggest that polyploidy is common in Mecardonia and appear to be an important factor in the evolution of this genus. The 2C- and 1Cx-values were also estimated in all the species. The 2C-values ranged from 1.91 to 5.29 pg. The 1Cx-values ranged from 0.88 to 1.03 pg. The general tendency indicated a decrease in the 1Cx-value with increasing ploidy level. The significance of the results is discussed in relation to taxonomy of the genus. © María M. Sosa et al.
format	JOUR
author	Sosa, M.M. Angulo, M.B. Greppi, J.A. Bugallo, V.
author_facet	Sosa, M.M. Angulo, M.B. Greppi, J.A. Bugallo, V.
author_sort	Sosa, M.M.
title	Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae)
title_short	Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae)
title_full	Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae)
title_fullStr	Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae)
title_full_unstemmed	Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae)
title_sort	chromosome numbers and dna content in some species of mecardonia (gratiolae, plantaginaceae)
url	http://hdl.handle.net/20.500.12110/paper_19930771_v10_n4_p769_Sosa
work_keys_str_mv	AT sosamm chromosomenumbersanddnacontentinsomespeciesofmecardoniagratiolaeplantaginaceae AT angulomb chromosomenumbersanddnacontentinsomespeciesofmecardoniagratiolaeplantaginaceae AT greppija chromosomenumbersanddnacontentinsomespeciesofmecardoniagratiolaeplantaginaceae AT bugallov chromosomenumbersanddnacontentinsomespeciesofmecardoniagratiolaeplantaginaceae
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Chromosome numbers and DNA content in some species of Mecardonia (Gratiolae, Plantaginaceae)

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