The species G. coronaria (L.) Cass. ex Spach and G. segetum (L.) Fourr. are accepted within the genus Glebionis Cass. for the Mediterranean. In this work we propose to elevate G. coronaria (L.) Cass. ex Spach var. discolor (d'Urv.) Turland to the rank of species as Glebionis discolor (d’Urv.) st. nov., based on the disposition of the intercostal glands, the colour of the ligules, and the size and wings of the cypselas of the flosculous flowers and their distribution. Glebionis coronaria (L.) Cass. ex Spach with totally yellow ligules is exclusive to the meso- Mediterranean thermotype, and Glebionis discolor (d’Urv.) stat. nov. is found in the thermo- and meso-Mediterranean (it is exclusive to the latter thermotype). In view of this, samples were taken in territories in Greece, Sicily, and in the south of the Italian and Iberian peninsulas. A micro- and macro-morphological study was done on the material herborized in pure populations, and on the voucher specimens conserved in various herbaria in these territories. Herborization was done following thermoclimatic criteria in order to establish the area of distribution of both varieties. High-resolution confocal microscopy was used for the micromorphological study of the achenes, after examination with normal microscopy to determine the most significant differences. The measurements of the cypselas of the flosculous flowers were done by taking images, duly scaled, of different populations in Portugal, Spain and Italy and of cultivated populations of both varieties. The measurements were made based on a number of observations ranging between 296 and 425, and a statistical treatment was applied using the XLSTAT program.

Análisis taxonómico de Glebionis coronaria (L.) Cass. ex Spach en el Mediterráneo / Taxonomic analysis of Glebionis coronaria (L.) Cass. ex Spach in the Mediterranean / Cano, E.; Musarella, Cm; Spampinato, G.; Piñar Fuentes, J. C.; Marquez, F.; Pinto Gomes, C. J.. - (2013), pp. 55-56. (Intervento presentato al convegno VII International Seminar Biodiversity Management and Conservation - “Planning and management of agricultural and forestry resources” tenutosi a Gambarie d‟Aspromonte – RC (Italy) nel 2013, June 2-7).

Análisis taxonómico de Glebionis coronaria (L.) Cass. ex Spach en el Mediterráneo / Taxonomic analysis of Glebionis coronaria (L.) Cass. ex Spach in the Mediterranean

Musarella CM;Spampinato G.;
2013-01-01

Abstract

The species G. coronaria (L.) Cass. ex Spach and G. segetum (L.) Fourr. are accepted within the genus Glebionis Cass. for the Mediterranean. In this work we propose to elevate G. coronaria (L.) Cass. ex Spach var. discolor (d'Urv.) Turland to the rank of species as Glebionis discolor (d’Urv.) st. nov., based on the disposition of the intercostal glands, the colour of the ligules, and the size and wings of the cypselas of the flosculous flowers and their distribution. Glebionis coronaria (L.) Cass. ex Spach with totally yellow ligules is exclusive to the meso- Mediterranean thermotype, and Glebionis discolor (d’Urv.) stat. nov. is found in the thermo- and meso-Mediterranean (it is exclusive to the latter thermotype). In view of this, samples were taken in territories in Greece, Sicily, and in the south of the Italian and Iberian peninsulas. A micro- and macro-morphological study was done on the material herborized in pure populations, and on the voucher specimens conserved in various herbaria in these territories. Herborization was done following thermoclimatic criteria in order to establish the area of distribution of both varieties. High-resolution confocal microscopy was used for the micromorphological study of the achenes, after examination with normal microscopy to determine the most significant differences. The measurements of the cypselas of the flosculous flowers were done by taking images, duly scaled, of different populations in Portugal, Spain and Italy and of cultivated populations of both varieties. The measurements were made based on a number of observations ranging between 296 and 425, and a statistical treatment was applied using the XLSTAT program.
2013
978-88-89367-87-2
Dentro del género Glebionis Cass. quedan aceptadas para el Mediterráneo las especies G. coronaria (L.) Cass. ex Spach y G. segetum (L.) Fourr. En este trabajo proponemos elevar al rango de especie G. coronaria (L.) Cass. ex Spach var. discolor (d'Urv.) Turland como Glebionis discolor (d’Urv.) st. nov., basándonos en la disposición de las glandulas intercostales, en el color de las ligulas, tamaños y alas de las cypselas de las flores flosculosas y en su distribución. Glebionis coronaria (L.) Cass. ex Spach de ligulas totalmente amarillas es exclusivo del termoclima termomediterráneo y Glebionis discolor (d’Urv.) stat. nov. es del termo y mesomediterráneo (en este ultimo es exclusivo). Por esto, se han muestreado territorios griegos, Sicilia y el sur de las Penínsulas Italiana e Ibérica. Se ha hecho un estudio micro y macromorfológico del material herborizado en poblaciones puras y de los pliegos de diferentes herbarios de dichos territorios. La herborización se hizo siguiendo criterios termoclimáticos con el objetivo de establecer el área de distribución de ambas variedades. Para el estudio micromorfológico de los aquenios se ha utilizado la microscopia confocal de alto poder de resolución, previo estudio con microscopia normal para ver previamente las grandes diferencias. Para la realización de las medidas de las cypselas de las flores flosculosas, se han tomado imágenes mediante microscopio estereoscópico, debidamente escaladas, de diferentes poblaciones de Portugal, España, Italia y de las cultivadas, de ambas variedades. Utilizando un número de observaciones que oscilan entre 296 y 425, se han realizado las distintas mediciones y se ha aplicado un tratamiento estadístico utilizando el programa XLSTAT.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12318/62610
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