Asteraceae) Encontradas No Parque Nacional Do Itatiaia- Rio De Janeiro, Brasil

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DIVERSIDADE POLINICA EM ESPÉCIES DE GNAPHALIEAE (ASTERACEAE) ENCONTRADAS NO PARQUE NACIONAL DO ITATIAIA- RIO DE JANEIRO, BRASIL Jéssica da Conceição Santos1,2, Raquel Maria Batista Souza de Souza3, Claudia Barbieri Ferreira Mendonça4, Roberto Lourenço Esteves5, Vania Gonçalves-Esteves4,6 1.Museu Nacional/Universidade Federal do Rio de Janeiro, Brasil,[email protected]; 2. Aluna de graduação/UERJ; 3.Pós-graduação em Botânica/Museu Nacional/UFRJ; 4. Professor da Universidade Federal do Rio de Janeiro/Museu Nacional; 5. Professor do IBRAG/Universidade do Estado do Rio de Janeiro; 6. Bolsista de Produtividade/CNPq. Pertencente à família Asteraceae, a tribo Gnaphalieae possui uma distribuição cosmopolita e destaca-se por sua representatividade em vários biomas. No Brasil é representada por 11 gêneros e 73 espécies e no Parna Itatiaia, são registrados 10 espécies e 4 gêneros. Neste trabalho foram analisados grãos de pólen de 9 espécies de Gnaphalieae: Achyrocline alata (Kunth) DC., Achyrocline saturioides (Lam) DC., Chionolaena capitata (Baker) Freire, Chionolaena isabelae Baker, Chionolaena latifolia (Benth) Baker, Gamochaeta purpurea (L.) Cabrera, Gamochaeta americana (Mill) Weed., Gamochaeta grazielae (Rizzini) Deble e Pseudognaphalium cheiranthifolium (Lam.) Hilliard & Burtt. O material para análise polínica foi obtido de exsicatas depositadas no herbário brasileiro do Museu Nacional da UFRJ ( R). Os grãos de pólen foram tratados pelo método da acetólise e posteriormente mensurados e fotomicrografados em microscópio de luz. Para a observação sob MEV, foram utilizados grãos de pólen não acetolisados. Na descrição foram considerados o tamanho, a forma, o tipo e número de aberturas e a ornamentação da sexina. Os resultados obtidos mostram que os grãos de pólen das espécies analisadas são em mônades médios, isopolares, oblato-esferoidais em Chionolaena capitata, C. latifolia, Gamochaeta purpurea e G. americana, prolato-esferoidais nas demais, 3-colporados, área polar muito pequena e colpos muito longos e estreitos nas espécies de Achyrocline; os outros gêneros apresentam área polar pequena e colpos longos e largos, colpo com membrana ornamentada apenas nas espécies de Chionolaena; endoabertura de circular a ligeiramente lalongada, presença de constricção mediana na endoabertura apenas em Pseudognaphalium cheiranthifolium, colpo com membrana ornamentada apenas nas espécies de Chionolaena. Sexina equinada, perfurada em Chionolaena, equinada com perfurações esparsas na base dos espinhos nas demais espécies, espinhos cônicos de base perfurada, sexina sempre mais espessa que a nexina. Pelos resultados obtidos conclui-se que as espécies diferenciam-se quanto ao tamanho, forma do pólen, área polar e forma da endoabertura. Palavras chave: Palinologia, Asteraceae. Gnaphalieae, Pólen. .

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Zeitschrift Für Naturforschung / C / 54 (1999)
602 Notes 16a,19-Diacetoxy-ewf-kaurane, a New Sephadex LH-20 to separate terpenoids from fla Natural Diterpene from the Exudate of vonoid aglcyones. The terpenoid portion (3.6 g) Ozothamnus scutellifolius (Asteraceae) was subjected to repeated column chromatogra phy on “flash” Si-gel using binary mixtures of Fco. Javier Arriaga-Giner3, Angel Rumberob increasing polarity (from H ex-AcO Et 10:1 v/v to and Eckhard Wollenweberc-* CH2Cl2-MeOH 20:1 v/v) furnishing 1 (19 mg), 2 a Tabacalera S. A., Centro I + D, c/Embajadores 51, E-28012 Madrid, Spain (72 mg), 3 (12 mg), 4 (25 mg), 5 (12 mg), 6 (23 mg) b Departamento de Quimica Orgänica, Universidad and 7 (9 mg). Autönoma de Madrid. Cantoblanco, Mass spectra were measured on a HP 5890 at 70 E-28049 Madrid, Spain eV via GC-MS. NMR spectra were recorded on a c Institut für Botanik der Technischen Universität, Schnittspahnstraße 3, D-64287 Darmstadt, Germany. Bruker AC-300 (300/75.4 MHz) in CDC13 or Fax: 06151/166878. CD3OD solutions. Multiplicities were assigned E-mail: [email protected] through DEPT experiments. * Author for correspondance and reprint requests 16a,19-Diacetoxy-e/ir-kaurane (1): White pow Z. Naturforsch. 54c, 602-604 (1999); der, mp. 112- 114oC. [a]D= -52.5 (c=0.55, CHC13). received April 1/April 29, 1999 Rf =0.44 (Hex/AcOEt 10:1). MS m/z (% rel. int.): Ozothamnus scutellifolius, Asteraceae, Leaf and Stem 390 (M+, -), 330 (M+ -AcOH, 13%), 315 (M+ - Exudate, Diterpenoids, Novel Kaurane Derivative AcOH-Me, 2), 270 (M+ -2AcOH, 4), 257 (13), 242 Leaf and stem exudate of Ozothamnus scutellifolius, (7), 221 (14), 161 (16), 119 (23), 106 (47), 94 (100), previously reported to contain 21 flavonoid aglycones, 81 (24), 67 (16), 55 (22) and 43 (73).
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Asteraceae)§ Karin M.Valant-Vetscheraa and Eckhard Wollenweberb,*
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7. Phylogenetic Studies in Gnaphalieae (Compositae): the Genera Phagnalon Cass
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Sinopse Do Gênero Gamochaeta Weddel (Asteraceae- Gnaphalieae) No Brasil'
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Updating to the Checklist of the Italian Vascular Flora: Asteraceae, Gnaphalieae
LagacaliaLagascalia 32,32: 2012261-268 (2012) 261 UPDATING TO THE CHECKLIST OF THE ITALIAN VASCULAR FLORA: ASTERACEAE, GNAPHALIEAE D. Iamonico Department of Environmental Biology, Sapienza University of Rome, Piaz- zale A. Moro 5, 00085 - Rome, Italy – [email protected] (Recibido el 8 de Octubre de 2012) Resumen. Se propone una actualización de los géneros italianos de la tribu Gnapha- lieae (Asteraceae). Cuatro géneros (dos nativos y dos alóctonos) son novedadeas para la flora de Italia. Se indican sus nombres correctos, protólogos, principales sinónimos, comparación con los géneros afines y la lista de las especies italianas (se incluye la distribución regional). Se incluye también el catálogo de géneros y especies italianas de Gnaphalieae. Palabras clave: Asteraceae, Gnaphalieae, flora vascular, Italia. Summary. The checklist of the Gnaphalieae genera (Asteraceae) occurring in Italy is updated. Four genera (two native and two exotic) are new for the flora of Italy. Their accepted names, references, main synonyms, comparison with related genera and the list of the Italian species (including the distribution at regional level) are provided. The complete list (genera and species) of Italian Gnaphalieae is also given. Key words: Asteraceae, Gnaphalieae, vascular flora, Italy. INTRODUCTION The Italian Flora includes 149 genera of Asteraceae Bercht. & J. Presl., nom. cons., nom. alt. (= Composite Giseke, nom. cons.), of which 2 are endemic, while 23 comprise only exotic species (Peruzzi, 2010). At genus level, the Asteraceae is the first richest family in Italy. The Tribe Gnaphalieae Cass. ex Lecoq. & Juill. consists of 11 genera in Italy (see Peruzzi, 2010). However, according to the current concepts (Greu- ter, 2006-2009; Galbany-Casals & al., 2010) new taxa have to be added to the Italian flora.
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