Pollen morphology of some species ofVernonanthura(Asteraceae, Vernonieae) from southern South America

Autor:	Alvaro Jose Vega, Massimiliano Dematteis
Rok vydání:	2011
Předmět:	food.ingredient biology Ecology POLLEN Vernonieae Paleontology VERNONIA TAXONOMY Asteraceae biology.organism_classification medicine.disease_cause Vernonanthura EVOLUTION Ciencias Biológicas food Pollen Botany medicine Taxonomy (biology) Ciencias de las Plantas Botánica CIENCIAS NATURALES Y EXACTAS
Zdroj:	Palynology. 35:94-102
ISSN:	1558-9188 0191-6122
Popis:	Pollen grains from 16 species of Vernonanthura H. Rob. were studied. All the species exhibit the type 'A' pollen characteristic of the genus. These grains are spheroidal to prolate-spheroidal, subechinolophate, tricolporate, with a continuous tectum which is densely microperforate, exhibiting lophae surrounding irregular depressions and having prominent spines. Despite most of the species having a similar pollen type, some taxa can be recognised by the morphology of the spines. According to the spine index (length/width), the species analysed can be divided into three groups having respectively short, medium and long spines. In addition to the size of the spines, some taxa can be distinguished by spine shape. Vernonanthura pinguis (Griseb.) H. Rob. has spines which are constricted at the base, while V. oligactoides (Less.) H. Rob. exhibits small conical spines. Vernonanthura nudiflora (Less.) H. Rob. and V. schulziana (Cabrera) H. Rob. have spines with rounded apices. This study confirms that Vernonanthura is a well-defined group based on pollen characteristics and that pollen morphology is a significant feature in the characterisation of species and genera of Vernonieae. © 2011 AASP - The Palynological Society. Fil: Vega, Alvaro Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Dematteis, Massimiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35dfc124a7a6513adbab8c3ba69e4602 https://doi.org/10.1080/01916122.2010.549290 Zobrazit plný text záznamu