Systematics value of micromorphological and palynological characters in stenocephalum Sch. Bip (vernonieae, asteraceae)

Micromorphological and palynological characters of all Stenocephalum Sch.Bip. species (Vernonieae, Asteraceae) were analyzed to evaluate their reliability as taxonomic markers at generic level and discussed in relation to other genera of the subtribe Lepidaploinae. Characters such as pubescence of c...

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Autores principales: Angulo, María Betiana, Chalup, Laura María Isabel, Dematteis, Massimiliano
Formato: Artículo
Lenguaje:Inglés
Publicado: Tubitak Scientific & Technical Research Council Turkey 2021
Materias:
Compositae
Micromorphological features
Pollen
Taxonomy
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/28241
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-28241
record_format dspace
spelling I48-R184-123456789-282412025-03-06T11:09:50Z Systematics value of micromorphological and palynological characters in stenocephalum Sch. Bip (vernonieae, asteraceae) Angulo, María Betiana Chalup, Laura María Isabel Dematteis, Massimiliano Compositae Micromorphological features Pollen Taxonomy Micromorphological and palynological characters of all Stenocephalum Sch.Bip. species (Vernonieae, Asteraceae) were analyzed to evaluate their reliability as taxonomic markers at generic level and discussed in relation to other genera of the subtribe Lepidaploinae. Characters such as pubescence of corollas and cypselae showed glandular and nonglandular trichomes allowing differentiation among related species. Apical appendages without glandular trichomes, caudate anthers, and carpopodium structure are common characteristics among Stenocephalum species. With the exceptions of S. megapotamicum and S. tragiaefolium, almost all species of the genus showed style bases without basal nodes for the first time. Crystals on the fruits wall were also observed for the first time in almost all the Stenocephalum species, with the exception of S. hystrix. However, the crystals would not constitute diagnostic features, since they vary widely among species. All the species showed type C pollen and the genus is considered stenopalynous. However, highly significant differences in palynological features among the species of the genus were observed. The different combinations of the micromorphological and palynological features of Stenocephalum here analyzed are valuable within genera to differentiate related species from one another. The value of all these characters could be increased if they are combined with other morphological or traditional data 2021-07-05T16:37:49Z 2021-07-05T16:37:49Z 2018-05 Artículo Angulo, María Betiana, Chalup, Laura María Isabel y Dematteis, Massimiliano, 2018. Systematics value of micromorphological and palynological characters in stenocephalum Sch. Bip (vernonieae, asteraceae). Turkish Journal of Botany. Ankara: Tubitak Scientific & Technical Research Council Turkey, vol. 42, no. 4, p. 478-490. ISSN 1303-6106. 1300-008X http://repositorio.unne.edu.ar/handle/123456789/28241 eng openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Tubitak Scientific & Technical Research Council Turkey Turkish Journal of Botany, 2018, vol. 42, no. 4, p. 478-490.
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 Compositae
Micromorphological features
Pollen
Taxonomy
spellingShingle Compositae
Micromorphological features
Pollen
Taxonomy
Angulo, María Betiana
Chalup, Laura María Isabel
Dematteis, Massimiliano
Systematics value of micromorphological and palynological characters in stenocephalum Sch. Bip (vernonieae, asteraceae)
topic_facet Compositae
Micromorphological features
Pollen
Taxonomy
description Micromorphological and palynological characters of all Stenocephalum Sch.Bip. species (Vernonieae, Asteraceae) were analyzed to evaluate their reliability as taxonomic markers at generic level and discussed in relation to other genera of the subtribe Lepidaploinae. Characters such as pubescence of corollas and cypselae showed glandular and nonglandular trichomes allowing differentiation among related species. Apical appendages without glandular trichomes, caudate anthers, and carpopodium structure are common characteristics among Stenocephalum species. With the exceptions of S. megapotamicum and S. tragiaefolium, almost all species of the genus showed style bases without basal nodes for the first time. Crystals on the fruits wall were also observed for the first time in almost all the Stenocephalum species, with the exception of S. hystrix. However, the crystals would not constitute diagnostic features, since they vary widely among species. All the species showed type C pollen and the genus is considered stenopalynous. However, highly significant differences in palynological features among the species of the genus were observed. The different combinations of the micromorphological and palynological features of Stenocephalum here analyzed are valuable within genera to differentiate related species from one another. The value of all these characters could be increased if they are combined with other morphological or traditional data
format Artículo
author Angulo, María Betiana
Chalup, Laura María Isabel
Dematteis, Massimiliano
author_facet Angulo, María Betiana
Chalup, Laura María Isabel
Dematteis, Massimiliano
author_sort Angulo, María Betiana
title Systematics value of micromorphological and palynological characters in stenocephalum Sch. Bip (vernonieae, asteraceae)
title_short Systematics value of micromorphological and palynological characters in stenocephalum Sch. Bip (vernonieae, asteraceae)
title_full Systematics value of micromorphological and palynological characters in stenocephalum Sch. Bip (vernonieae, asteraceae)
title_fullStr Systematics value of micromorphological and palynological characters in stenocephalum Sch. Bip (vernonieae, asteraceae)
title_full_unstemmed Systematics value of micromorphological and palynological characters in stenocephalum Sch. Bip (vernonieae, asteraceae)
title_sort systematics value of micromorphological and palynological characters in stenocephalum sch. bip (vernonieae, asteraceae)
publisher Tubitak Scientific & Technical Research Council Turkey
publishDate 2021
url http://repositorio.unne.edu.ar/handle/123456789/28241
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AT chaluplauramariaisabel systematicsvalueofmicromorphologicalandpalynologicalcharactersinstenocephalumschbipvernonieaeasteraceae
AT dematteismassimiliano systematicsvalueofmicromorphologicalandpalynologicalcharactersinstenocephalumschbipvernonieaeasteraceae
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