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	Provedor de dados Acta Botanica (1) Genet. Mol. Biol. (1) Autor Attar,Farideh (2) Sheidai,Masoud (2) Ghahreman,Ahmad (1) Mehdigholi,Kazem (1) Riahi,Hosein (1) Shabestari,Elaheh Sadat Bagheri (1) Mais... Palavra-chave Centaurea (1) Chiasma frequency (1) Cluster analysis (1) Cousinia (1) Exine ornamentation (1) Light microscopy (1) Meiosis (1) Palynology (1) Scanning electron microscopy (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2013 (1) 2006 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Cytogenetic study of the genus Cousinia (Asteraceae, section Serratuloideae) in Iran Genet. Mol. Biol. Sheidai,Masoud; Mehdigholi,Kazem; Ghahreman,Ahmad; Attar,Farideh. Meiotic studies of ploidy level, chromosome paring and chiasma frequency were performed on 11 Cousinia (Asteraceae) species of the section Serratuloideae. The diploid number of the species studied was 2n = 2x = 24 and 26 so these species possess two different basic numbers (x = 12 or 13), a phenomenon common to other sections of the genus. The chromosome numbers of 9 species are reported here for the first time. When the 2n = 24 and 2n = 26 species were subjected to cluster analysis based on relative meiotic characters two different clusters were formed indicating their distinctness. Our data support the results obtained from morphometry, anatomy, pollen morphology and molecular studies of the genus Cousinia. Tipo: Info:eu-repo/semantics/article Palavras-chave: Cousinia; Chiasma frequency; Cluster analysis; Meiosis. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100022 Pollen morphology of Centaurea L. (Asteraceae) in Iran Acta Botanica Shabestari,Elaheh Sadat Bagheri; Attar,Farideh; Riahi,Hosein; Sheidai,Masoud. The genus Centaurea L. is one of the largest genera in the family Asteraceae. The number of taxa included in this genus ranges from 500 to 600 worldwide. Iran is one of the major centers of diversity for this genus. Pollen morphology has proved useful in the systematics of Asteraceae, as well as in that of some of its genera and species. The pollen morphology of 19 taxa of the genus Centaurea was investigated in detail by light and scanning electron microscopy. Examination under light microscopy showed pollen grains to be tricolporate, isopolar, radially symmetrical, oblate spheroidal, prolate spheroidal, subprolate, tectum perforate and scabrate. Based on the exine ornamentation observed under scanning electron microscopy, we identified two types of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Centaurea; Palynology; Exine ornamentation; Light microscopy; Scanning electron microscopy. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400004 Registros recuperados: 2 Primeira ... 1 ... Última

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