Academic literature on the topic 'Angiospermic Flora'
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Journal articles on the topic "Angiospermic Flora"
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Rahman, A. H. M. Mahbubu. "Angiospermic Flora of Rajshahi District, Bangladesh." American Journal of Life Sciences 1, no. 3 (2013): 105. http://dx.doi.org/10.11648/j.ajls.20130103.15.
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Rahman, M. Oliur, and Md Abul Hassan. "New angiospermic taxa for the flora of Bangladesh." Bangladesh Journal of Plant Taxonomy 24, no. 2 (December 30, 2017): 165–71. http://dx.doi.org/10.3329/bjpt.v24i2.35112.
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This paper presents addition of 89 taxa under 64 genera distributed in 32 families for the flora of Bangladesh which are not included in the monumental works Flora of British India, Bengal Plants and Encyclopedia of Flora and Fauna of Bangladesh. Updated nomenclature, family name, references to the work and the precise localities have been furnished under each taxon.Bangladesh J. Plant Taxon. 24(2): 165–171.
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Rahman, Md Oliur, Md Zashim Uddin, Ershad Tutul, Momtaz Begum, and Md Abul Hassan. "Additions to the angiospermic flora of Runctia sal forest, Bangladesh." Bangladesh Journal of Plant Taxonomy 17, no. 2 (December 21, 2010): 167–81. http://dx.doi.org/10.3329/bjpt.v17i2.6696.
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In the present paper additional occurrence of 100 species in 75 genera under 40 angiosperm families in the Runctia Sal Forest of Sherpur district is reported. Of these, 71 species in 56 genera are from Magnoliopsida (Dicots) and 29 species in 19 genera are from Liliopsida (Monocots). These species exhibit in diverse life forms in the area, viz., 54 species are herbs, 21 species shrubs, 12 species climbers and 13 trees. Holigarna longifolia is threatened in the Sal forest area which needs to give conservation priorities. An enumeration of the species recorded is presented with important synonyms, Bengali names, habit, habitat and representative specimens.Keywords: Angiosperms; Runctia sal forest; Addition.DOI: 10.3329/bjpt.v17i2.6696Bangladesh J. Plant Taxon. 17(2): 167-181, 2010 (December)
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Uddin, Mohammad Zashim, and Md Abiabdullah. "Taxonomic Study On The Angiosperms Of Char Kukri Mukri Wildlife Sanctuary, Bhola District." Journal of the Asiatic Society of Bangladesh, Science 42, no. 2 (December 25, 2016): 153–68. http://dx.doi.org/10.3329/jasbs.v42i2.46219.
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The paper presents the status of angiospermic flora of Char Kukri Mukri Wildlife Sanctuary, a small Island in the Bay of Bengal close to the Char Fassion Upazila of Bhola district. A total of 277 plant species belonging to 76 families was identified from the Island. For each plant species data on scientific name, local name, family, life form and habitat were provided. Trees of this Island were represented by 91, shrubs by 33, herbs by 118 and climbers by 35 species. The plant species recorded from the island were distributed in different habitats. Among the habitats, maximum species were recorded in homesteads (104) followed by roadsides (79), mangrove areas (47) and cultivated land (47).The study has reported the presence of medicinal plants, wildlife supporting plants, exotics and invasive plants, rare and threatened plants in the Island. The presence of fruit bearing species in the island is very rare because of high salinity. The introduction of exotics and invasive species into the Island has been recognized as the great challenges to the local angiospermic flora in future. This article also highlights the conservation values, management concerns and some measures for conservation of angiosperm diversity in the Island.
Asiat. Soc. Bangladesh, Sci. 42(2): 153-168, December 2016
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Siwakoti, Mohan. "A Checklist of Angiospermic Flora in and around the Lumbini Sacred Garden, Nepal." Journal of Natural History Museum 23 (June 4, 2009): 27–44. http://dx.doi.org/10.3126/jnhm.v23i0.1837.
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Lumbini Sacred Garden has stretches of Saccharum dominated grassland and patches of Dalbergia forest. A total of 354 species belonging to 75 families and 245 genera of angiospermic plants has been documented from the Lumbini Sacred Garden and its adjoining areas. Out of these, 258 species belong to 61 families and 187 genera of dicotyledons whereas, 96 species to 14 families and 58 genera of monocotyledons. There are 246 species of herbs, 54 species of trees, 29 species of shrubs and 25 species of Climbers. The paper attempts to give the list of the plants with habit and habitat occurred in Lumbini Sacred Garden and adjoining places.Key words: Angiosperm; flora; Lumbini; Nepal.Journal of Natural History Museum Vol. 23, 2008 Page 27-44
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Shilpa Vinodia et al,., Shilpa Vinodia et al,. "Angiospermic Flora of Achanakmar-Amarkantak Biosphere Reserve, Central India." International Journal of Botany and Research 7, no. 4 (2017): 41–54. http://dx.doi.org/10.24247/ijbraug20176.
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Ravikumar, K., N. Dhatchanamoorthy, A. C. Tangavelou, T. S. Suma, and S. Noorunnisa Begum. "New Additions to the angiospermic flora of Nagaland, India." Pleione 12, no. 1 (June 30, 2018): 118. http://dx.doi.org/10.26679/pleione.30.6.2018.118-127.
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Huda, Mohammed Kamrul, Mohammed Mozammel Hoque, and Md Owahidul Alam. "Three new Angiospermic (Orchidaceae) records from Bangladesh." Jahangirnagar University Journal of Biological Sciences 9, no. 1-2 (June 1, 2021): 123–32. http://dx.doi.org/10.3329/jujbs.v9i1-2.53712.
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Coelogyne schwadtkii Danell., Cleisostoma williamsonii (Rchb.) Garay. and Phalaenopsis difformis (Wall. ex Lindl.) Kocyan & Schuit. of the family Orchidaceae collected from southeast part of the country have been reported here as new angiospermic records for Bangladesh flora. Detailed critical examination of the specimens of these species has been made to confirm their taxonomic identification. Detailed taxonomic description with flowering time, ecology, geographical distribution, illustration and photographs of each species has been provided.
Jahangirnagar University J. Biol. Sci. 9(1 & 2): 123-132, 2020 (June & December)
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Kshirsagar, Sanjay. "Origin, present status and distribution of exotic plants in South Gujarat." Indian Journal of Forestry 28, no. 2 (June 1, 2005): 136–43. http://dx.doi.org/10.54207/bsmps1000-2005-n1e6h3.
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In the present paper 108 exotic angiospermic plant species belonging to 37 families and 95 genera which are either naturalized or cultivated in South Gujarat, Gujarat state, India are enumerated with focus on their origin, present status and distribution and invasive impact. 11.45% flora is exotic in South Gujarat while 47.22% (51 out of 108 species) exotic flora comes from America alone. The maximum number of exotic plants (14 species) belongs to the family Compositae.
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Tutul, Ershad, Md Zashim Uddin, Md Oliur Rahman, and Md Abul Hassan. "Angiospermic flora of Runctia sal forest, Bangladesh. II. Magnoliopsida (Dicots)." Bangladesh Journal of Plant Taxonomy 17, no. 1 (June 29, 2010): 33–53. http://dx.doi.org/10.3329/bjpt.v17i1.5389.
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This paper deals with a total of 153 plant species under 120 genera and 52 families of the division Magnoliopsida (Dicots) of the Runctia Sal forest in Sherpur district. Habit analysis shows that herbs are represented by 34, shrubs 36, trees 65, climbers 17 and epiphyte by a single species. Updated nomenclature, habit, habitat and representative specimen have been furnished under each taxon.Keywords: Angiosperms; Magnoliopsida; Runctia sal forest.DOI: 10.3329/bjpt.v17i1.5389Bangladesh J. Plant Taxon. 17(1): 33-53, 2010 (June)
Dissertations / Theses on the topic "Angiospermic Flora"
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Lepcha, Sonam Rinchen. "Studies of the Angiospermic Flora of Alpine East Sikkim with Special Reference to Pangolakha wild life Sanctuary." Thesis, University of North Bengal, 2010. http://hdl.handle.net/123456789/1429.
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Martins, Aline Cristina. "Abelhas coletoras de óleo e suas interações com as flores de Plantaginaceae produtoras de óleo floral." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/59/59131/tde-23042010-154006/.
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Os óleos florais são os recursos alternativos ao pólen e néctar oferecidos por onze famílias de angiospermas às abelhas coletoras de óleo. A produção deste recurso surgiu ao menos 28 vezes e a coleta destes, em cinco linhagens distintas entre as abelhas. Na região Neotropical, Malpighiaceae é a família mais diversa e melhor conhecida em termos de seu sistema de polinização e relação com abelhas coletoras de óleo. Plantaginaceae é conhecida por alguns trabalhos, focados principalmente em Angelonia e Monttea. No presente estudo, são apresentadas as relações entre abelhas coletoras de óleo e flores de Plantaginaceae (cinco espécies de Angelonia e uma de Basistemon), com especial atenção aos aspectos morfológicos de ambos, aspectos comportamentais das abelhas durante a coleta e a sobreposição geográfica entre os parceiros deste mutualismo. Este trabalho apresenta pela primeira vez dados dos visitantes de três espécies: A. eriostachys, A. goyazensis e Basistemon silvaticus; além de dados inéditos sobre espécies já estudadas: A. cornigera, A. integerrima e A. salicariifolia. Foi observado que as estruturas especializadas presentes no labelo de todas as espécies estudadas de Angelonia estão associadas à imposição da postura correta do visitante e sua fixação na flor. As flores de Basistemon são mais simples neste sentido e apresentam apenas um discreto calo mediano. Apesar da morfologia destas estruturas diferirem consideravelmente entre as espécies, é possível estabelecer relações de origem entre elas. A assembléia de visitantes das flores de Angelonia e Basistemon variou entre três a dezoito espécies. Estas espécies foram consideradas polinizadoras ou visitantes ilegítimos. As abelhas do gênero Centris foram consideradas as principais polinizadoras das plantas estudadas, porém, espécies de Tapinotaspidini, em especial o gênero Caenonomada, também detêm esse papel. As abelhas que coletam óleo também coletam pólen, com exceção dos gêneros Centris, Caenonomada e Tapinotaspis, que coletam apenas óleo. O comportamento adequado dos polinizadores de Angelonia e Basistemon, imposto pela morfologia floral, implica na coleta do óleo com as pernas anteriores e o contato com os órgãos férteis na fronte ou mesoscuto em flores com corola mais profunda. Algumas espécies estão morfologicamente adaptadas a coleta nestas flores, como exemplo, as abelhas Centris grupo hyptidis, que possuem aparatos coletores divergentes de todo o padrão apresentado pelo gênero. Quanto à distribuição destas plantas e de seus potenciais polinizadores, em alguns casos, há grande sobreposição e os potenciais polinizadores podem ou não ser especialistas nestas fontes de óleo. Os casos de baixa congruência geográfica mostram que muitos destes potenciais polinizadores não dependem das fontes de óleo de Angelonia e Basistemon.Floral oils are alternative flower reward to pollen and nectar that are offered by eleven families of angiosperms to oil-collecting bees. The production of this resource appeared at least 28 times, and its collection has been observed in five different lineages of bees. In the Neotropical Region, Malpighiaceae is the most diverse and best known family concerning to the pollination system and the interactions with oil-collecting bees. Plantaginaceae is well known due to some studies mostly on Angelonia and Monttea. In this study, the relationship between the oil-collecting bees and the Plantaginaceae flowers (five species of Angelonia and one of Basistemon) is presented, being given special attention to the morphological aspects of both, the bees behavior during the oil collection and the geographical overlap between the partners of this mutualism. This work presents for the first time the visitors of three species (A. eriostachys, A. goyazensis and Basistemon silvaticus), as well as new data on already studied species (A. cornigera, A. integerrima and A. salicariifolia). It was recorded that the specialized structures that are found on the lip (labellum) of all the known species of Angelonia are associated to the imposition of the correct posture of the visitor and their fixation on the flower. The Basistemon flowers are, in this way, less complex and they present only a discrete median callus. Although the morphology of these structures differ considerably among species, it is possible to establish relationships between their origins. The assemblage of visitors of the flowers of Angelonia and Basistemon varied from three to eighteen species. These species were considered pollinators or illegitimate visitors of the studied species. The bees of the genus Centris were considered the main pollinators of these plants; however species of Tapinotaspidini also play this role. These bees collect oil and pollen, in most species, having as exceptions the genera Centris, Caenonomada e Tapinotaspis that collect only oil. The correct behavior of the visitors of Angelonia and Basistemon flowers, imposed by the floral morphology, results the collection of oil with the forelegs and the contact of their fertile organs with their anterior head or dorsal thorax (in flowers with deep corolla). Some species are morphologically adapted to sample in these flowers, for example, the Centris bees group hyptidis, that have collecting apparatus that diverge from the pattern found in the genera. In respect to the distribution of these plants and their potential pollinators, in some cases, there is a large overlap and the potential pollinators may or may not be specialists in these oil sources. The cases of low geographical congruency show that many of these potential pollinators do not depend only on the oil sources of Angelonia and Basistemon.
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Hayes, Peta Angela. "Cretaceous angiosperm leaf floras from Antarctica." Thesis, University of Leeds, 1999. http://etheses.whiterose.ac.uk/21096/.
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Late Cretaceous angiosperm leaf floras from the Antarctic Peninsula have been studied and described for the first time. The Hidden Lake Formation (Coniacian) and Santa Marta Formation (Santonian-early Campanian) floras were preserved within shallow marine strata exposed on James Ross Island. This area was located at approximately 65°S during the Late Cretaceous. These fossils represent the remains of vegetation growing in the southern high latitudes on an emergent volcanic arc. The plants probably grew on the delta top and along the edge of streams. The leaf fossils are preserved as isolated and fragmentary impressions and although cuticular anatomy is not present, the angiosperm leaves show the well-preserved fine detail of leaf architecture. These leaves have been drawn and described using Hickey's (1979) terminology. Attempts were made to group the leaves into morphotypes to allow reconstruction of floral composition and palaeoclimates. Several methods of grouping leaves were used, including visual grouping, Single character classification, and multivariate approaches. Multivariate statistical analysis allowed many characters to be considered simultaneously and even allowed fragmentary specimens, which were harder to deal with visually, to be evaluated. Clustering analysis was performed and dendrograms were produced for the Hidden Lake Formation and Santa Marta Formation floras, which were used in conjunction with visual assessments to group leaves with distinct morphologies into morphotypes. A total of 41 morphotypes were identified, 30 in the Hidden Lake Formation flora and 31 in the Santa Marta Formation flora, with 20 in common. Detailed descriptions of each morphotype and representative illustrations are presented. Comparisons have been drawn with fossil and living angiosperm leaves. Architectural characteristics suggest that some of the leaves may have affinities with the Cunoniaceae, Lauraceae, Sterculiaceae, Nothofagaceae, Myrtaceae and Elaeocarpaceae. If botanical affinities can be confirmed, many of these occurrences would extend the ranges of angiosperm taxa on the Antarctic Peninsula. Palaeoclimatic interpretation of the leaf floras included comparisons with possible nearest living relatives, analysis of leaf margins, shapes and sizes, and the application of simple linear regression and multiple linear regression models. The climate is considered to have been warm and moist. Mean annual temperature estimates of 12-21°C were provided for the Hidden Lake Formation flora and 14-23°C for the Santa Marta Formation flora. Evaluation of published data suggests that these Coniacian-early Campanian leaf floras may reflect the warmest time during the Cretaceous in Antarctica.
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Silveira, Carina Lima da. "Características vegetativas e reprodutivas das plantas e fatores abióticos do meio e suas relações com a alocação de biomassa floral e a seleção sexual em angiospermas." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316105.
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Orientador: Marlies SazimaTese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia
Made available in DSpace on 2018-08-16T23:39:07Z (GMT). No. of bitstreams: 1 Silveira_CarinaLimada_D.pdf: 5862141 bytes, checksum: b872125bc30a6004f911ec2155703df4 (MD5) Previous issue date: 2010
Resumo: As plantas são organismos sésseis que estão à mercê do estresse ambiental. As flores são estruturas fundamentais na evolução das angiospermas, pois através delas ocorre a reprodução sexuada. Para isto, as flores exibem estratégias que auxiliam a planta a obter melhor sucesso reprodutivo. Animais visitam flores em busca de recursos, no entanto, ao transportar grãos de pólen entre os indivíduos da mesma espécie vegetal, atuam como mediadores no processo de seleção sexual, importante força na evolução florai. Fatores ecológicos que afetam a relação entre plantas e polínizadores podem influenciar a evolução das estratégias reprodutivas das espécies. Fatores abióticos, a distribuição espacial, o tamanho populacional e a história de vida das plantas podem modificar a abundância e a distribuição dos recursos para os polínizadores, alterando padrões de transporte de pólen, fluxo gênico e pressões seletivas responsáveis pela evolução floral. Este trabalho busca compreender a diversidade das estratégias reprodutivas em diferentes formações vegetais tropicais, a modulação por características vegetativas e reprodutivas das plantas e abióticas do meio na alocação de recursos como, também, verificar a existência de consistência biogeográfica dos padrões alométricos em relação as estratégias reprodutivas das plantas. O estudo foi realizado em áreas de vegetação tropical, sendo uma área de Floresta Atlântica, uma área de Cerrado, ambas no estado de São Paulo e uma área de Campo Rupestre, no estado de Minas Gerais, permitindo a comparação da variação da biomassa floral entre as três formações vegetais e entre angiospermas tropicais com particularidades morfológicas relacionadas às áreas de coleta e dados bibliográficos de espécies extra-tropicais. A riqueza de formas vegetais e de ambientes nas regiões tropicais atua na modulação da interação entre plantas e polínizadores, influenciando na variação da biomassa floral e nas características vegetativas e reprodutivas das espécies. As alometrias positivas e a isometria encontradas nas floras tropicais e extra-tropícats em relação ao crescimento da biomassa floral apontam para a presença e desenvolvimento de características sexuais secundarias como importantes ferramentas na permanência e sucesso da reprodução cruzada. Características vegetativas e reprodutivas influenciam na variação interespecífica da biomassa floral e que a função masculina da flor teria forte impacto na evolução das características florais, independentemente da ligação filogenética entre as angiospermas, ressaltando a necessidade de teorias que permitam uma síntese destas relações.
Abstract: Plants are sessile organisms exposed to the effects of environmental stress. The flowers are fundamental structures in the evolution of angiosperms, because through them is sexual reproduction. For this, the flowers exhibit strategies that help the plant to achieve better reproductive success. Animals visit flowers in search of resources, however, to carry pollen between individuals of the same plant species, act as mediators in the process of sexual selection, major force in floral evolution. Ecological factors affecting the relationship between plants atid pollinators may influence the evolution of reproductive strategies of species. Abiotic factors, spatial distribution, population size and life history of plants can modify the abundance and distribution of resources for pollinators by changing patterns of pollen transfer, gene flow and selective pressures responsible for floral evolution. This work seeks to understand the diversity of reproductive strategies in different tropical vegetation types, the modulated vegetative and reproductive features of plants and the abiotic environment in resource allocation as well, check for consistency biogeographical of allometric patterns in reproductive strategies in relation to plants. The study was conducted in areas of tropical vegetation, with an area of Atlantic Rain Forest, an area of Savannah, both in the state of Sao Paulo and an area of Campo Rupestre, in the state of Minas Gerais, allowing the comparison of variation among floral biomass the three vegetation types and between tropical angiosperm morphological peculiarities related to the areas of collection and bibliographic data of extra-tropical species. The richness of plant forms and environments in tropical acts in modulating the interaction between plants and pollinators, influencing the variation of biomass in the floral and vegetative and reproductive characteristics of species. The positive allometry and isometry floras found in tropical and extra-tropical growth over the floral biomass indicate the presence and development of secondary sexual characteristics as important tools in the permanence and success of cross-breeding. Vegetative and reproductive characteristics influence the interspecific variation of floral biomass and that the function of male flowers have a strong impact on the evolution of floral traits, regardless of the phylogenetic connection between the angiosperms, highlighting the need for theories that allow a synthesis of these relationships.
Doutorado
Ecologia
Doutor em Ecologia
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Reyes, Elisabeth. "Evolutionary history of floral key innovations in angiosperms." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS489/document.
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Les Angiospermes forment un clade connu pour sa grande diversité d’espèces et une répartition inégale de cette diversité en son sein. Ce travail se concentre sur la reconstruction d’états ancestraux de caractères floraux sur les phylogénies dans le but d’étudier leur impact sur la diversification. En premier lieu, nous nous sommes focalisés sur deux innovations-clés potentielles chez les Proteaceae, la symétrie bilatérale du périanthe et la présence dans les hotspots à climat méditerranéen. L’utilisation sur une phylogénie de modèles de diversification dépendants des états de caractère a permis de montrer que le premier état caractère n’a pas d’impact significatif sur la diversification des espèces dans ce groupe, contrairement au second. Ensuite, nous avons reconstruit les états ancestraux de la symétrie du périanthe à l’échelle de toutes les Angiospermes, avec une stratégie d’échantillonnage permettant de refléter toutes les transitions de ce caractère. Nous avons mis en évidence un minimum de 130 origines de la symétrie bilatérale, suivies de 69 réversions vers la symétrie radiaire. Enfin, la même méthode a été étendue à l’étude de quatre autres caractères du périanthe. Différents modèles de reconstruction d’états ancestraux ont été utilisés sur une phylogénie de 1232 espèces pour examiner l’influence des changements de modèle sur les états ancestraux reconstruits. Nos résultats montrent que les changements de modèles de reconstruction ont une influence sur l’état de certains nœuds seulement, jamais sur l’ensemble. Les différents résultats trouvés pour la symétrie, caractère commun aux trois chapitres, révèlent que notre méthode d’échantillonnage présente l’inconvénient d’estimer des taux de transition trop élevés pour donner des résultats concluants avec la méthode du maximum de vraisemblance. Les résultats sont en revanche beaucoup moins biaisés lorsque l’on examine plusieurs caractères simultanémentAngiosperms are a clade known for its great species diversity and the uneven distribution of this diversity among its lineages. This work focuses on the ancestral state reconstruction of floral characters on phylogenies in the purpose of studying their impact on diversification. We first focused on two potential key innovations in Proteaceae, bilateral perianth symmetry and presence in Mediterranean-climate hotspots. Using character state dependent diversification models, we found that the first character state did not have any significant impact on species diversification in this group, contrary to the second one. We then reconstructed ancestral states for perianth symmetry in angiosperms as a whole, using a sampling strategy aimed at capturing all of the transitions in this character. We found a minimum of 130 origins of bilateral symmetry, followed by 69 subsequent reversals to radial symmetry. Lastly, the same approach was extended to the study of four other perianth characters. Different ancestral state reconstruction models were used on a phylogenetic tree of 1232 species to test the influence of model changes on reconstructed ancestral states. Our results show that changes in reconstruction models have an impact on the inferred ancestral state of some nodes, but not all of them. The various results obtained for symmetry, a character shared among the three chapters, indicate that our sampling method has the drawback of estimating transition rates too high to give conclusive results with maximum likelihood. On the other hand, results are much less biased when several characters are examined simultaneously
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Massoni, Julien. "Phylogeny, molecular dating and floral evolution of Magnoliidae (Angiospermae)." Phd thesis, Université Paris Sud - Paris XI, 2014. http://tel.archives-ouvertes.fr/tel-01044699.
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Deep phylogenetic relationships in the angiosperms had long been uncertain. However, by the end of the 1990s, large-scale studies contributed to the current well resolved picture of the tree of flowering plants, in which eudicots, monocots, and magnoliids are the three largest clades. Whereas monocots and eudicots have been recognized since the very first phylogenetic analyses, the monophyly of magnoliids (Canellales, Laurales, Magnoliales, and Piperales) is a more recent result. Magnoliidae, as now circumscribed, consist of 20 families and ca. 10,000 species mostly distributed in the tropics. Before the present thesis, several parts of the magnoliid tree had been well studied, but little was known about the evolutionary history of Magnoliidae as a whole. The first chapter of this thesis is a phylogenetic study conducted to clarify the relationships among families and orders of Magnoliidae. To do so, I sampled 199 species of Magnoliidae and 12 molecular markers from the three genomes and conducted phylogenetic analyses using parsimony, maximum likelihood, and Bayesian methods. The results confirm, with a greater level of support, two clades in Magnoliidae: Canellale + Piperales, and Laurales + Magnoliales. In addition, the relationships among the 20 families are generally well supported, and Lactoridaceae and Hydnoraceae are nested within Aristolochiaceae (Piperales). In the second chapter, the ages and phylogenetic positions of 10 fossils attributed to Magnoliidae were reviewed in detail. The goal of this study was to provide new reliable calibration points in order to conduct molecular dating analyses. These fossils were selected from the rich fossil record of the group because of their previous inclusion in phylogenetic analyses with extant taxa. The resulting calibration scheme provides six solid, internal minimum age constraints. The third chapter includes molecular dating analyses using the present calibration scheme and the same molecular dataset of Chapter 1. This study tends to push back in time the ages of the crown nodes of Magnoliidae (127.1-198.9 Ma), and of the four orders, Canellales (126.3-141.0 Ma), Piperales (88.2-157.7 Ma), Laurales (111.8-165.6 Ma), and Magnoliales (115.0-164.2 Ma). In the same chapter, I investigated the mode of diversification in the group. The strongly imbalanced distribution of species appears to be best explained by models of diversification with 6 to 14 diversification rate shifts. Finally, in the last chapter, I traced the evolution of 26 floral characters to reconstruct the ancestral flowers in key nodes of Magnoliidae. I used the phylogeny of Chapter 1 and an exemplar approach. Our results show that the most recent common ancestor of all Magnoliidae was a tree bearing actinomorphic, bisexual flowers with a differentiated perianth of two alternate, trimerous whorls of free perianth parts (outer and inner tepals) and probably three free stamens. This work provides key results on the evolution of Magnoliidae and raises several new questions such as the impact of geological crises on diversification of the group or the influence of pollinators and the environment on the evolution of floral morphology.
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ARAÚJO, Cínthia Menezes Lima Ramos. "A tribo melastomeae (melastomataceae juss.) na Mata Atlântica no nordeste oriental." Universidade Federal de Pernambuco, 2013. https://repositorio.ufpe.br/handle/123456789/12560.
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Realizou-se o levantamento dos representantes de Melastomeae presentes na Mata Atlântica dos estados do Rio Grande do Norte, Paraíba, Pernambuco e Alagoas. O levantamento consistiu em coletas do material fértil em 14 localidades no período de março de 2012 a fevereiro de 2013, e também na consulta às coleções de herbários da área de estudo e de âmbito nacional. A tribo Melastomeae está representada na região por 16 espécies pertencentes a sete gêneros: Pterolepis (DC.) Miq., com sete espécies; Acisanthera P. Browne,com três espécies; Comolia DC., Marcetia DC. e Tibouchina Aubl., com duas espécies cada e Aciotis D.Don e Nepsera Naud., com uma espécie cada. O trabalho inclui uma chave para identificação das espécies, descrições, comentários e ilustrações.
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Dias, Eduarda Barreto Andrade. "Iridaceae Juss. no Distrito Federal, Brasil." reponame:Repositório Institucional da UnB, 2010. http://repositorio.unb.br/handle/10482/7311.
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As Iridaceae abrangem aproximadamente 66 gêneros e mais de 2030 espécies distribuídas principalmente nos continentes do hemisfério sul, sendo o seu principal centro de diversidade o sul da África e em seguida a América do Sul. Seus representantes são encontrados em savanas e campos, com poucas espécies ocorrendo em formações florestais. O Brasil possui 18 gêneros e 160 espécies, sendo que os gêneros com maior número de espécies são Sisyrinchium L., com 58 espécies, e Neomarica Sprague e Pseudotrimezia, com 21 espécies. São caracterizadas por possuírem flores vistosas, grande parte polinizada por insetos e por possuir órgãos subterrâneos do tipo rizoma, cormos ou bulbos. A maioria das espécies é herbácea, com folhas simples, cilíndricas ou planas, lineares ou linear-ensiformes, inflorescência do tipo ripídio ou espiga, flores bissexuadas actinomorfas ou zigomorfas, trímeras, com 3 estames opostos às tépalas externas, ovário ínfero, trilocular e fruto do tipo cápsula loculicida. O presente trabalho tem como objetivo contribuir para o conhecimento da flora do Distrito Federal, baseando-se em coletas de campo e na análise de materiais herborizados de coleções dos quatro herbários do Distrito Federal, além do Herbário da Universidade de São Paulo e do Instituto de Botânica de São Paulo. Foram encontrados 4 gêneros e 11 espécies: Alophia coerulea (Vell.) Chukr, Alophia sellowiana Klatt, Cipura paludosa Aubl., Cipura xanthomelas Mart. ex Klatt, Sisyrinchium luzula Klotzsch ex Klatt, Sisyrinchium micranthum Cav., Sisyrinchium vaginatum Spreng., Trimezia cathartica (Klatt) Niederl., Trimezia juncifolia (Klatt) Benth. & Hook. f., Trimezia lutea (Klatt) R.C. Foster, Trimezia martinicensis (Jacq.) Herb. São apresentadas chaves de identificação para os gêneros e espécies, descrições, ilustrações, mapas e comentários sobre a ecologia das espécies no Distrito Federal. _________________________________________________________________________________ ABSTRACT
The family Iridaceae has approximately 66 genera and more than 2030 species, distributed mainly in the continents of the southern hemisphere, and has more diversity in southern Africa and then South America. They are found in savannas and grasslands, with a few species in the forests. In Brazil this family has 11 genera and 50 species, and the genera with more species are: Neomarica Sprague (20 spp.), Trimezia Salisb. ex Herb. (13 spp.) e Sisyrinchium L. (10 spp.). The species of Iridaceae are characterized by eye-catching flowers, mostly pollinated by insects, and have rhizomes, corms or bulbs. Most species are herbaceous, with simple leaves, cylindrical or flat, linear or linear-ensiforms, with rhipidium or spike inflorescences and bisexual actinomorphic or zygomorphic flowers with two whorls of three tepals, with three stamens opposite to the outer tepals. The ovary is often inferior and the fruits are loculicidal capsules with three locules. This work aims to contribute to the knowledge of Iridaceae in the Federal District, and is based on field surveys and material analysis of the four different herbarium collections in the Federal District, and the herbarium of University of São Paulo and the São Paulo Institute of Botany. Four genera and 11 species were found: Alophia coerulea (Vell.) Chukri, Alophia sellowiana Klatt, Cipura paludosa Aubl., Cipura xanthomelas Mart. ex Klatt, Sisyrinchium luzula Klotzsch ex Klatt, Sisyrinchium micranthum Cav., Sisyrinchium vaginatum Spreng., Trimezia cathartica (Klatt) Niederle., Trimezia juncifolia (Klatt) Benth. & Hook. f., Trimezia lutea (Klatt) RC Foster and Trimezia martinicensis (Jacq.) Herb. Identification keys of genera and species, descriptions, illustrations and comments about the ecology of the species in the Federal District are also presented in this work.
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Abdullah, Mansour Taleb. "Conserving the biodiversity of Kuwait through DNA barcoding the flora." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28786.
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Biodiversity across the globe is threatened. Rapid surveying and monitoring techniques are required to understand the origin of the threats to biodiversity and to enable conservation actions to be undertaken. Kuwait is an arid desert country with a small flora of only 402 species. This flora is endangered by environmental factors, overgrazing, and human activities. DNA barcoding the flora and using Next Generation Sequencing (NGS) technologies allowed us to identify plants to species level, conduct a molecular taxonomic revision, and distinguish plant diversity found in soil environmental DNA samples. After investigating the discriminatory power of five commonly used DNA markers from plastid (matK, rbcL, trnH-psbA, trnL) and a nuclear genome (ITS2) on four largest genera of the flora using phylogenetics reconstruction tree based methods, two barcoding markers (rbcL and ITS2) were assigned to build a DNA reference library of the flora. Furthermore, the DNA reference library was tested to identify the plant diversity found below-ground level and comparing it with that above-ground, using environmental soil samples collected from both species rich and poor habitats in Kuwait by applying high-throughput sequencing methods. The DNA database provided in this study could be used as a reference library for the identification process and contribute towards the future of molecular taxonomy, biodiversity and ecological research in Kuwait.
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Globo, William Vieira. "Primeiro registro de macroflora do Pleistoceno Final nas margens do rio Teles Pires, MT, Brasil." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/174209.
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Este trabalho tem como objetivo realizar o reconhecimento taxonômico de folhas fósseis de angiospermas, as quais foram recuperadas pelo salvamento paleontológico realizado no âmbito do Programa Investigação, Monitoramento e Salvamento do Patrimônio Paleontológico da UHE Teles Pires. Os depósitos fossilíferos, encontrados em amostras de argilitos laminados, situavam-se no atual leito e terraços (diques marginais) do rio Teles Pires, dentro da área destinada ao reservatório. Na base do afloramento fitofossilífero estudado, restos vegetais em clastos de lama retrabalhados apresentaram idade absoluta entre 22.580 e 23.290 anos AP, obtida por método de radiocarbono (14C). Para a presente contribuição, foram selecionados para determinação taxonômica 27 espécimes, preservados na forma de impressões e compressões. Através da análise e descrição da arquitetura foliar dos espécimes foram identificadas uma monocotiledônea e sete eudicotiledôneas (Albizia subdimidiata e Parkia multijuga, da Família Fabaceae; Brosimum cf. gaudichaudii, da Família Moraceae; Theobroma speciosum e Apeiba sp., da Família Malvaceae; Aspidosperma cf. polyneuron, da Família Apocynaceae, e um espécime atribuído à Família Myrtaceae – Tribo Myrtae). A composição florística dos táxons analisados, juntamente com a distribuição geográfica dos seus representantes atuais e seus respectivos hábitos e hábitats, acusou a predominância de elementos florísticos tipicamente da Floresta Amazônica, sob regime de clima úmido. Porém, duas espécies que podem ocorrer em vegetação de savana foram assinaladas (i.é, Aspidosperma cf. polyneuron, Brosimum cf. gaudichaudii).This work aims at the taxonomic recognition of fossil leaves of angiosperms, which were recovered by the paleontological rescue carried out under the Program Research, Monitoring and Salvage of the Paleontological Heritage of the Teles Pires Hydroelectric Power Plant. The fossiliferous deposits, found in samples of laminated argillite, were located in the current bed and terraces (marginal dikes) of the Teles Pires River, inside the area destined to the water reservoir. At the base of the studied phytophossiliferous outcrop, vegetal remains in reworked mud clasts presented absolute age between 22,580 and 23,290 years BP, through the dating obtained by radiocarbon method (14C). For the present contribution, 27 specimens, preserved in the form of impressions and compressions, were selected for taxonomic determination. A monocotyledonous and seven eudycotyledonous (Albizia subdimidiata and Parkia multijuga, of the Family Fabaceae, Brosimum cf. gaudichaudii, of the Family Moraceae, Theobroma speciosum and Apeiba sp., of the Family Malvaceae, Aspidosperma cf. polyneuron, of the Family Apocynaceae, and a specimen attributed to the Family Myrtaceae - Tribe Myrtae) were identified through the analysis and description of the foliar architecture of the specimens. The floristic composition of the analyzed taxa, together with the geographical distribution of their current representatives and their respective habitats and habits, accused the predominance of floristic elements typically found in the Amazon Rainforest, under a humid climate regime. However, two species that may occur in savanna vegetation have been identified (i.e., Aspidosperma cf. polyneuron, Brosimum cf. gaudichaudii).
Books on the topic "Angiospermic Flora"
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Chen, Yiling. Flora Reipublicae Popularis Sinicae: Angiospermae : Balsaminaceae. Beijing: Science Press, 2001.
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Bhat, K. Gopalakrishna. Flora of Udupi. Udupi: Indian Naturalist, 2003.
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Ghosh, Deepak Kr. Flora of Darjeeling Himalayas and foothills: Angiosperms. Dehra Dun, India: Research Circle, Forest Directorate, Government of West Bengal & Bishen Singh Mahendra Pal Singh, 2014.
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D, Sharma B., and Botanical Survey of India, eds. Flora of India. Calcutta: Botanical Survey of India, 1993.
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Heywood, V. H. Flowering plants: A pictorial guide to the world's flora. Buffalo, N.Y: Firefly Books, 2011.
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Evans, P. A. (Patricia A. ), 1929-., Evans Ian M, and Rothero G. P, eds. Flora of Assynt. [Scotland?]: P.A. Evans and I.M. Evans, 2002.
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Manilal, K. S. Flora of Silent Valley. Calicut: [s.n.], 1988.
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Kealhofer, Lisa. Opal phytoliths in Southeast Asian flora. Washington, D.C: Smithsonian Institution Press, 1998.
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Negru, Andrei. Determinatór de plante din flora Republicii Moldova. Chișinău: [Editura Universul], 2007.
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Kothari, M. J. Flora of Raigad District, Maharashtra State. Calcutta: Botanical Survey of India, 1993.
Find full textBook chapters on the topic "Angiospermic Flora"
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Bhandari, Prabin. "Angiosperm Diversity in Nepal." In Flora and Vegetation of Nepal, 279–98. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-50702-1_11.
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Kaur, Inderdeep. "Outbreeding in Angiosperms: Floral Architecture and Sexuality." In Reproductive Ecology of Flowering Plants: Patterns and Processes, 215–44. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4210-7_11.
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Friis, Else Marie, Kaj Raunsgaard Pedersen, and Peter R. Crane. "Angiosperm floral structures from the Early Cretaceous of Portugal." In Early Evolution of Flowers, 31–49. Vienna: Springer Vienna, 1994. http://dx.doi.org/10.1007/978-3-7091-6910-0_3.
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Kaplan, Donald R., and Chelsea D. Specht. "Morphology of Reproductive Shoots III. The Angiosperms A. The Floral Shoot." In Kaplan's Principles of Plant Morphology, 1067–108. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781315118642-21.
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Phukela, Banisha, Arjun Adit, and Rajesh Tandon. "A Snapshot of Evolutionary History of Floral Nectaries Across Angiosperm Lineages." In Reproductive Ecology of Flowering Plants: Patterns and Processes, 105–29. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4210-7_6.
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Stone, Benjamin C. "New evidence for the reconciliation of floral organisation in Pandanaceae with normal angiosperm patterns." In The Plant Diversity of Malesia, 33–55. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-2107-8_5.
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Kaplan, Donald R., and Chelsea D. Specht. "Morphology of Reproductive Shoots III. The Angiosperms B. The Floral Organs in Their Pre- and Post-Fertilization States." In Kaplan's Principles of Plant Morphology, 1109–66. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781315118642-22.
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"Angiospermae." In Arizona Flora, 62–203. 2nd ed. University of California Press, 2023. http://dx.doi.org/10.2307/jj.7968058.18.
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Willmer, Pat. "Wind and Water: Abiotic Pollination." In Pollination and Floral Ecology. Princeton University Press, 2011. http://dx.doi.org/10.23943/princeton/9780691128610.003.0019.
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This chapter examines abiotic pollination via wind or water. It begins with a discussion of wind pollination or anemophily, which is a common occurrence in modern plants, especially in most gymnosperms, in the catkin-bearing angiosperm trees, and in cereals (Poaceae and Cyperaceae). Anemophily is predominantly a derived condition in angiosperms, associated with ecological conditions where zoophily is difficult. Transition from zoophily to anemophily has occurred at least sixty-five times in such circumstances. The chapter looks at wind-pollinated angiosperm and conifer flowers and goes on to consider critical factors affecting pollen movement in anemophilous plants. It concludes with an overview of hydrophily, or water pollination.
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Puri, Renu, and Anjana Rustagi. "Current Trends in Developmental Genetics and Phylogenetic Patterns of Flower Symmetry." In Plant Reproductive Ecology - Recent Advances. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.101772.
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Flower Symmetry is a key evolutionary innovation in some lineages of angiosperms. The flowers of the primitive angiosperm plants were radially symmetrical actinomorphic. Later bilaterally symmetrical zygomorphic flowers independently evolved in several clades of angiosperms. This transition of trait is associated with an adaptation to specialized methods of pollination. Zygomorphic flowers allow more specific plant insect interaction. So, the transition from radial symmetry to bilateral symmetry facilitates reproductive isolation which in turn might have led to diversification or rapid speciation of some lineages in angiosperms. Phylogenetic analyses in lineages of angiosperms revealed that few clades have shown that there have been reversals, that is, there is transition from bilateral symmetry to radial symmetry. When such studies are correlated with genetic studies, it is revealed that CYC (TCP family) transcription factors are responsible for the transition of this floral trait. Phylogenetic analyses, genetic studies and Evo-Devo analyses can answer important questions such as what other transition in floral symmetry is found in angiosperms? Is there a pattern of floral symmetry transition in different lineages? Do these transitions act as key innovation for the clades in which they have evolved?
Conference papers on the topic "Angiospermic Flora"
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Barcelos, Flavia Braga, and Jorge Antonio Silva Costa. "Taxonomia e fitogeografia das leguminosae (fabaceae) do Refúgio de Vida Silvestre (REVIS) do Rio dos Frades." In 7º Congresso de Iniciação à Pesquisa, Criação e Inovação. GM Editorial, 2023. http://dx.doi.org/10.61202/2595-9328.7cipciou0020.
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A família Leguminosae A. Juss. (=Fabacea) é a terceira maior entre as angiospermas com uma distribuição cosmopolita, especialmente nas regiões tropicais e subtropicais. O Refúgio de Vida Silvestre do Rio dos Frades é uma unidade de conservação federal no município de Porto Seguro, Bahia que apresenta muitas áreas com vegetação nativa e exótica alterada por atividades antrópicas. O objetivo deste trabalho permeou em contribuir para o conhecimento da flora do Refúgio de Vida Silvestre (REVIS) do Rio dos Frades, da Floresta Costeira da Bahia e para a Flora do Brasil, através do estudo taxonômico e da análise de biogeografia entre as floras de Leguminosae de diferentes ecossistemas da Mata Atlântica. O levantamento da flora foi realizado através de coletas na região de estudo, priorizando-se áreas pouco amostradas. No estudo taxonômico foram analisadas, identificadas e descritas, segundo bibliografia especializada, as exsicatas provenientes das coletas armazenadas na coleção do Herbário Prof. Geraldo C. P. Pinto (GCPP) da UFSB em Porto Seguro/BA. Para análise de similaridade foi utilizado o índice de Jaccard com interpretação pela média de grupo (UPGMA). Foram coletados 17 espécimes, distribuídos em 13 espécies em 2 subfamílias de Leguminosae. O coeficiente de similaridade foi baixo evidenciando uma alta heterogeneidade nesse tipo de ecossistema ressaltando a necessidade de serem estudadas para melhor entender seus aspectos e a importância de sua conservação.
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Barcelos, Flavia Braga, and Jorge Antonio Silva Costa. "Taxonomia e fitogeografia das leguminosae (fabaceae) do Refúgio de Vida Silvestre (REVIS) do Rio dos Frades." In 7º Congresso de Iniciação à Pesquisa, Criação e Inovação. GM Editorial, 2023. http://dx.doi.org/10.61202/2595-9328.7cipciou0020.
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A família Leguminosae A. Juss. (=Fabacea) é a terceira maior entre as angiospermas com uma distribuição cosmopolita, especialmente nas regiões tropicais e subtropicais. O Refúgio de Vida Silvestre do Rio dos Frades é uma unidade de conservação federal no município de Porto Seguro, Bahia que apresenta muitas áreas com vegetação nativa e exótica alterada por atividades antrópicas. O objetivo deste trabalho permeou em contribuir para o conhecimento da flora do Refúgio de Vida Silvestre (REVIS) do Rio dos Frades, da Floresta Costeira da Bahia e para a Flora do Brasil, através do estudo taxonômico e da análise de biogeografia entre as floras de Leguminosae de diferentes ecossistemas da Mata Atlântica. O levantamento da flora foi realizado através de coletas na região de estudo, priorizando-se áreas pouco amostradas. No estudo taxonômico foram analisadas, identificadas e descritas, segundo bibliografia especializada, as exsicatas provenientes das coletas armazenadas na coleção do Herbário Prof. Geraldo C. P. Pinto (GCPP) da UFSB em Porto Seguro/BA. Para análise de similaridade foi utilizado o índice de Jaccard com interpretação pela média de grupo (UPGMA). Foram coletados 17 espécimes, distribuídos em 13 espécies em 2 subfamílias de Leguminosae. O coeficiente de similaridade foi baixo evidenciando uma alta heterogeneidade nesse tipo de ecossistema ressaltando a necessidade de serem estudadas para melhor entender seus aspectos e a importância de sua conservação.
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Lima, P. G. C., J. A. Silva, and A. L. P. Feliciano. "Estimativa da riqueza de Angiospermas em função das famílias mais expressivas na flora brasileira." In VIII Simpósio Brasileiro de Pós-Graduação em Ciências Florestais. Recife, Pernambuco, Brasil: Universidade Federal Rural de Pernambuco, 2014. http://dx.doi.org/10.12702/viii.simposfloresta.2014.202-619-2.
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Saulsbury, James G., Dori L. Contreras, and Dori L. Contreras. "DISPERSAL ECOLOGY OF A LATE CAMPANIAN FLORA FROM SOUTH-CENTRAL NEW MEXICO; IMPLICATIONS FOR THE BREADTH AND TIMING OF ANGIOSPERM REPRODUCTIVE STRATEGIES." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-287794.
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Ferreira, Caris Mariana Nascimento, Sarah Gonçalves Duarte, Bianca Ortiz, and Marcos Gervasio Pereira. "PALINOLOGIA DE PLANTAS VASCULARES DA UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO (UFRRJ), CAMPUS SEROPÉDICA." In II Congresso Brasileiro de Ciências Biológicas On-line. Revista Multidisciplinar Educação e Meio Ambiente, 2021. http://dx.doi.org/10.51189/rema/1646.
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Introdução: Palinologia é a ciência que estuda grãos de pólen e esporos de plantas atuais e fósseis preservadas em rochas e sedimentos. A partir da necessidade de estudos que fornecessem conhecimento da flora polínica da região, iniciou-se o estudo palinológico de plantas do campus Seropédica da UFRRJ e a construção de uma Palinoteca no Departamento de Solos da UFRRJ. Materiais e Métodos: Coletou-se no campus Seropédica da UFRRJ, materiais de Angiospermas e Monilófitas, sendo confeccionadas 38 exsicatas para depósito no Herbário RBR. Em laboratório, foram coletadas, com auxílio de uma lupa, esporângios e anteras para realização da acetólise padrão, sendo produzidas 81 lâminas para observação em microscopia óptica, descrição da morfologia polínica e análise morfométrica dos grãos e esporos, sendo o material utilizado para a confecção da primeira Palinoteca da UFRRJ. Resultados: Quanto à descrição polínica morfológica e morfométrica das Angiospermas observou-se que Mimosa caesalpiniifolia possui tamanho pequeno. Os Hibiscus rosa-sinensis, tanto var. rosa, vermelha e branca e Talipariti tiliaceum possuem tamanho muito grande e são apolares, Antigonon leptopus, Delonix regia, Ipomoea sp., Pachira aquatica, Stifftia chrysantha, Thevetia peruviana e a Thunbergia grandiflora, Thunbergia alata são grandes. As espécies de Thunbergia são heteropolares e as demais espécies isopolares. Para a espécie Yucca sp., foi observado padrão monocolpado, e as espécies de Thunbergia possuem colpo espiroaperturado. H. rosa-sinensis, Ipomoea e T. tiliaceum apresentam poros e superfícies equinadas, Bougainvillea spectabilis, C. fistula, Clerodendrum splendens, C. thomsoniae e Tecoma stans possui grãos tricolpados. A. leptopus, B. spectabilis, D. regia e P. aquatica possuem ornamentação reticulada, os Clerodendrum são microequinados; M. caesalpiniifolia e Yucca sp. são psilados; Murraya paniculata e S. chrysantha são estriados e T. alata é escabrada. Todos apresentam simetria radial e são mônades com exceção de M. caesalpiniifolia que é uma políade. Quanto as samambaias, observou-se perispório em Nephrolepis biserrata diferindo de Microgramma vacciniifolia, ambas são de tamanho médio, heteropolares, de lesão monolete, superfície verrucada e mônade. Conclusão: Através do estudo foi possível verificar a grande variação de características das espécies analisadas, bem como deu início a construção da primeira Palinoteca da UFRRJ.
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Ansanelo, Adrielly Pereira, and LUCAS VILAS BOAS SIMIRIO. "METODOLOGIA ATIVA NO ENSINO DE CIÊNCIAS - RELATO DE EXPERIÊNCIA. CONHECENDO A DIVERSIDADE E CLASSIFICAÇÃO VEGETAL POR MEIO DE ESTAÇÕES DE APRENDIZAGEM." In II Congresso Brasileiro de Biodiversidade Virtual. Revista Multidisciplinar de Educação e meio ambiente, 2022. http://dx.doi.org/10.51189/ii-conbiv/5467.
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Introdução: A Base Nacional Comum Curricular (BNCC) propõe educação de qualidade e combate à desigualdade, dentre as propostas para a formação integral, orienta a utilização de conteúdos contextualizados e práticas que estimulem o protagonismo estudantil. A BNCC assegura que cada indivíduo aprende ativamente, sendo protagonista do processo ensino aprendizagem, a partir do contexto em que se encontra, do que lhe é próximo ao nível de competência que possui, significativo e relevante. Por esses apontamentos, o uso de metodologias ativas em pesquisas educacionais apresenta uma grande possibilidade de compreensão da práxis escolar. Objetivo: Assim, a aplicação da metodologia ativa aqui considerada, consistiu em rotações por estações de aprendizagem no ensino de ciências, objetivando proporcionar aos alunos experiências que promovam aprendizagens significativas e relevantes a sua formação integral; e, estimulem aprendizagem, autogestão, autonomia e formação cidadã. Material e Métodos: As seis estações de aprendizagem foram exploradas por turmas do 9 º ano do Ensino Fundamental ao estudar diversidade e classificação vegetal. Os alunos foram divididos em grupos e percorreram as estações, ao fim do tempo estipulado trocavam de atividade. Resultados: Na Estação 1, observou-se ao microscópio folhas de elodea, para determinar e justificar se o material observado era animal ou vegetal. Nas Estações 2, 3, 4 e 5, investigou-se materiais biológicos de Briófitas, Pteridófitas, Gimnospermas e Angiospermas, objetivando reconhecer os integrantes de cada grupo vegetal, e relacionar a ausência de vaso condutor ao tamanho reduzido dos musgos, a dependência destes e das samambaias da água para reprodução, e a importância do grão de pólen, flor, semente e fruto para a conquista do ambiente terrestre. Na Estação 6, ao montar um quebra - cabeça, se depararam com a árvore filogenética dos vegetais, sendo desafiados a compreender as relações de parentesco entre os vegetais e identificar as características que diferenciam um grupo do outro. Conclusão: Ao observar os alunos engajados, participativos, debatendo as questões, explorando os materiais biológicos e os equipamentos de observação, respeitando e gerenciando o tempo de cada atividade, conclui-se que a inserção de metodologias ativas no ensino de ciências tende a promover aprendizagens significativas e contribuir para a formação integral do educando e sua emancipação social.