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Laticíferos articulados anastomosados: novos registros para Apocynaceae
Demarco, Diego;Kinoshita, Luiza Sumiko;Castro, Marília de Moraes;
Brazilian Journal of Botany , 2006, DOI: 10.1590/S0100-84042006000100012
Abstract: laticifer presence is universal in apocynaceae, in the classic literature the type described for this family is the non-articulated. later researches have proved the occurrence of articulated laticifers only in four species, giving rise to controversies on their origin. the results obtained in our studies differ from those reported for most species of this family. in both aspidosperma australe müll. arg. (rauvolfioideae) and blepharodon bicuspidatum fourn. (asclepiadoideae), the laticifers are of the articulated anastomosing type because they are formed by adding cells with rapidly dissolving transverse walls. laticifers originate from ground meristem and/or procambium and form a branched system, they are in secretory phase since the early stages of formation in different organs, releasing latex only when the plant is damaged. the laticifer walls are exclusively pectic-cellulosic and their chemical characteristics probably change during their development. vegetative organ laticifers occur in all stem and leaf tissues, except epidermis and medullary parenchyma of a. australe. in the flower, laticifers are found in all floral organs, except in the medullary parenchyma of the pedicel of a. australe and in the ovules of both species. the presence of the same type of laticifer in these two genera, which represent the most divergent subfamilies within the apocynaceae corroborates the current circumscription of this family. the latex has protective function, allowing the species of this family to succeed in different environments.
Taxonomic Relationships of Some Taxa of Subfamily Asclepiadoideae (Apocynaceae) as Reflected by Morphological Variations and Polymorphism in Seed Protein and RAPD Electrophoretic Profile  [PDF]
Sherif M. Sharawy
International Journal of Botany , 2013,
Abstract: Taxonomic status of some members of the subfamily Asclepiadoideae (Apocynaceae) was analysed using variation of morphological features, seed protein electrophoretic pattern and molecular RAPD-PCR markers. The relationships between the examined taxa have been expressed as UPGMA trees, based on the coefficient of similarity using the NTSYS-pc software program. In all trees, the species of tribe Ceropegieae have been delimited together as one group from another major group that comprises species of tribe Asclepiadeae. The present work supports the earlier classification that transferred the genus Ceropegia from subtribe Stapeliinae to subtribe Ceropegiinae. The delimitation of species of tribe Asclepiadeae in four groups supports their previous subtribal delimitation.
Jorge Fontanella-Pereyra,Margot Valle Ferreira
Bonplandia , 2010,
Abstract: A taxonomic revision of the Brazilian species of the genus Macroditassa Malme (Apocynaceae-Asclepiadoideae) is presented. The genus belongs to the subfamily Asclepiadoideae R.Br. ex Burnett, tribe Asclepiadeae (R.Br.) Duby, subtribe Metastelmatinae Endl. ex Meisn. and is the most closely related to the Ditassa R.Br. genus. Macroditassa has 14 taxa of which 11 are found in Brazil, where they occurr in the Atlantic forest, disturbed areas, clearings and gullies, "cerrado", "cerradao", "campo rupestre", "campos" (high-altitude savannas) and sandy coast plains ("restingas"). In this paper the identification key of the taxa, descriptions and illustrations, data on flowering and fruiting, as well as maps showing the geographic distribution are presented Uma abordagem taxonómica das especies brasileiras do género Macroditassa Malme (Apocynaceae-Asclepiadoideae) é apresentada. O género pertence á subfamilia Asclepiadoideae R.Br. ex Burnett, tribo Asclepiadeae (R.Br.) Duby, subtribo Metastelmatinae Endl. Ex Meisn., sendo assim mais estreitamente afim a Ditassa R.Br. Macroditassa conta, atualmente, com 14 táxons, dos quais 11 ocorrem no Brasil sendo encontrados em floresta atlántica, em áreas perturbadas, clareiras, depressóes, cerrado, cerradáo, campos rupestres, campos de altitude e em restingas. Neste trabalho sáo fornecidas chaves para identificacáo, descricóes e ilustracóes, dados sobre a floracáo e frutificacáo, assim como a distribuicáo geográfica, utilizando-se mapas e ilustracóes
On the first tachinid fly (Diptera, Tachinidae) carrying Asclepiadoideae pollinaria in the Neotropical Region
Nihei, Silvio Shigueo;Schwarz, Elizabeth de Araujo;
Revista Brasileira de Entomologia , 2011, DOI: 10.1590/S0085-56262011005000031
Abstract: on the first tachinid fly (diptera, tachinidae) carrying asclepiadoideae pollinaria in the neotropical region. this paper reports the first neotropical tachinidae species possibly associated to pollination of asclepiadoideae: a female of euacaulona sumichrasti townsend, 1908 (diptera, tachinidae, phasiinae, trichopodini) carrying pollinaria of gonolobus parviflorus decne., 1844 (apocynaceae, asclepiadoideae, asclepiadeae: gonolobinae) attached to its proboscis. the fly specimen was collected in paraguay, departamento canindeyú. the pollinarium is illustrated and described herein. this represents the first anthophilous record to g. parviflorus and to the genus.
Taxonomy "under construction": advances in the systematics of Apocynaceae, with emphasis on the Brazilian Asclepiadoideae
Rapini, Alessandro;
Rodriguésia , 2012, DOI: 10.1590/S2175-78602012000100007
Abstract: the apocynaceae comprise approximately 5,000 species and are widely distributed. the family belongs to the gentianales and can be easily recognized by the presence of latex and a style-head derived from the fusion of two carpels at the apex of the styles. the largest subfamily in apocynaceae is asclepiadoideae. treated as the asclepiadaceae for almost two centuries, it comprises about 3,000 species and is defined by stamens with bisporangiate anthers and pollen transferred in specialized units called pollinaria. since the 19th century, floristic studies and taxonomic monographs have significantly contributed to the taxonomy of brazilian asclepiadoideae. nevertheless, advances in understanding the internal relationships in the subfamily were not done until this millennium, with the popularization of phylogenetic studies based on molecular data and powerful computer analyses. advances in the systematics of apocynaceae have provided new interpretations on the morphological evolution and biogeography of the family and have led to important changes in its classification. nevertheless, several taxonomic rearrangements are still needed and it can be said that the taxonomy of apocynaceae is "under construction". in this article, the major taxonomic changes in the family are reviewed, with special attention given to the systematics of neotropical groups. a cladogram of the apocynaceae is presented, which highlights the phylogenetic position of the brazilian genera and their diversity in number of native species. the main studies and the diversity of asclepiadoideae in brazil are summarized and perspectives for future research on the subfamily are presented.
Primeiro registro de simuliidae (Diptera) com polinários de asclepiadoideae (Apocynaceae)
Medeiros, Jansen F.;Rapini, Alessandro;Barbosa, Ulysses C.;Py-Daniel, Victor;Braga, Pedro I.S.;
Neotropical Entomology , 2008, DOI: 10.1590/S1519-566X2008000300015
Abstract: the presence of pollinaria of two species of asclepiadoideae (apocynaceae), possibly tassadia cf. martiana decne. and t. cf. obovata decne., attached to the mouth parts of simulid black flies [cerqueirellum amazonicum (goeldi), c. argentiscutum (shelley & luna dias), c. oyapockense (floch & abonnenc), and cerqueirellum sp.] are reported for the first time. the frequency and distribution of simulids recorded with pollinaria suggest that removal of pollinaria by these flies is not casual. simulids probably use nectar in flowers of asclepiadoideae as source of sugar, being able to remove their pollinaria. this finding demonstrates that simulids are not only vector of pathogenic parasites, but also carry pollinaria, and thus may represent a group of pollinators for species of asclepiadoideae with small flowers.
Two new species in the Matelea stenopetala complex (Apocynaceae, Asclepiadoideae) from the Guiana Shield and Amazonian Brazil  [cached]
Alexander Krings,Gilberto Morillo
PhytoKeys , 2012, DOI: 10.3897/phytokeys.17.3485
Abstract: Two new species in the Matelea stenopetala complex (Apocynaceae, Asclepiadoideae) are described from the Guiana Shield and Amazonian Brazil: Matelea brevistipitata Krings & Morillo, sp. nov. and M. trichopedicellata Krings & Morillo, sp. nov. The new species belong to a small group of adaxially-pubescent-flowered taxa within the complex, including M. hildegardiana and M. pakaraimensis. The new species are described and a dichotomous key is provided.
Asclepiadoideae (Apocynaceae) from Southeast Brazil-II. New synonyms and new occurrence for Metalepis cubensis in Brazil Asclepiadoideae (Apocynaceae) do Sudeste do Brasil-II. Novos sin nimos e nova ocorrência para Metalepis cubensis no Brasil
Jorge Fontella Pereira,Monique Britto de Goes
Pesquisa Florestal Brasileira , 2010, DOI: 10.4336/2012.pfb.58.77
Abstract: Metalepis cubensis (A. Rich.) Griseb. known only to Central America and north of South America (Colombia and Equador) is registered as a new occurrence to Brazil, Espirito Santo State. Eight taxa described previously are included here as new synonyms. Description and illustration are given. doi: 10.4336/2009.pfb.58.77 Metalepis cubensis (A. Rich.) Griseb. (Apocynaceae-Asclepiadoideae), conhecida somente na América Central e norte da América do Sul (Col mbia e Equador), é registrada como nova ocorrência para o Brasil no Estado do Espírito Santo. Oito táxons descritos anteriormente s o aqui incluídos como novos sin nimos. Também s o apresentadas descri o e ilustra o desta espécie. Doi: 10.4336/2009.pfb.58.77
Lectotypifications in Ditassa R.Br. (Apocynaceae: Asclepiadoideae)
Konno, Tatiana U.P.;Wanderley, Maria das Gra?as L.;
Brazilian Journal of Botany , 2004, DOI: 10.1590/S0100-84042004000400004
Abstract: as results of a revision of the brazilian species of ditassa, lectotypes for d. endoleuca schltr., d. pauciflora decne. and d. ramosa e. fourn. (= d. blanchetii decne.) are designated.
La familia Apocynaceae sensu lato en México: diversidad y distribución
Juárez-Jaimes, Verónica;Alvarado-Cárdenas, Leonardo O;Villase?or, José Luis;
Revista mexicana de biodiversidad , 2007,
Abstract: apocynaceae s.l. is among the 15 most diverse families in mexico, with a total of 385 species, distributed in 50 genera and 3 subfamilies of which asclepiadoideae is the most diverse in numbers of genera, species and endemics. the genera with the most native species and endemics are asclepias and matelea. the richest states in terms of taxon diversity are those at the pacific and atlantic slopes, chiapas, oaxaca, guerrero and veracruz being the most prominent. tropical deciduous forest and arid tropical scrub are the most important vegetation types by their total number of species, 176 of which are endemic to mexico. a list of species recorded in méxico is provided, indicating their state distribution.
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