Biossistem?tica do complexo Cryptanthus zonatus (Vis.) Beer

• Main Author: Magalh?es, Raissa Elizabeth de Castro
• Other Authors: 08484748723
• Language: Portuguese
• Published: Universidade Federal do Rio Grande do Norte 2015
• Subjects: CNPQ::CIENCIAS BIOLOGICAS; Anatomia foliar; Fenologia; Morfologia floral; Biologia floral
• Online Access: http://repositorio.ufrn.br/handle/123456789/19320

Submitted by Automa??o e Estat?stica ([e-mail]) on 2015-10-26T20:38:34Z No. of bitstreams: 1 RaissaElizabethDeCastroMagalhaes_DISSERT.pdf: 2956084 bytes, checksum: 30ed0d43ac433b53772eebeed7a3cef9 (MD5) === Approved for entry into archive by Elisangela Moura ([e-mail]) on 2015-10-26T21:28:15Z (GMT) No. of bitstreams: 1 RaissaElizabethDeCastroMagalhaes_DISSERT.pdf: 2956084 bytes, checksum: 30ed0d43ac433b53772eebeed7a3cef9 (MD5) === Made available in DSpace on 2015-10-26T21:28:15Z (GMT). No. of bitstreams: 1 RaissaElizabethDeCastroMagalhaes_DISSERT.pdf: 2956084 bytes, checksum: 30ed0d43ac433b53772eebeed7a3cef9 (MD5) Previous issue date: 2013-12-18 === Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPQ === A delimita??o taxon?mica ao n?vel de esp?cie em plantas n?o ? uma tarefa f?cil, devido ao grande polimorfismo dos vegetais. No presente trabalho objetivamos avaliar tr?s morfotipos (formas) de Cryptanthus zonatus (Vis.) Beer (Bromeliaceae, Bromelioideae) descritos na literatura, lan?ando m?o da biologia floral e fenologia, al?m da morfologia floral e anatomia foliar. As ?reas de realiza??o do estudo foram o Parque Estadual das Dunas de Natal e a Reserva Particular do Patrim?nio Natural da Mata Estrela, no munic?pio de Ba?a Formosa Rio Grande do Norte (RN). Para o estudo fenol?gico foram feitas visitas mensais durante o per?odo de um ano, onde foram feitas observa??es acerca das fenofases de flora??o e frutifica??o das popula??es das tr?s formas de C. zonatus. Para biologia floral, procurou-se avaliar dados como: tipo de visitante floral, volume e concentra??o de n?ctar e hor?rio de abertura e fechamento das flores. Flores das tr?s formas foram coletadas em campo, analisadas ao estereomicrosc?pio e as medidas das pe?as foram feitas com a ajuda de um paqu?metro. Cortes transversais e paradermais de folhas das tr?s formas foram feitos, corados e posteriormente analisados ao microsc?pio ?tico. Observa??es de cortes paradermais em microsc?pio eletr?nico de varredura tamb?m foram feitas. Todos os dados mostraram n?o haver diferen?as significativas entre as tr?s formas. Desse modo, conclui-se que n?o h? subs?dios para o reconhecimento dos tr?s morfotipos de C. zonatus como entidades taxon?micas, e que as ferramentas de fenologia, anatomia, biologia floral e morfologia floral n?o foram conclusivas para delimitar esses tr?s morfotipos. Ainda visando caracterizar melhor a Flora de Bromeliaceae do RN, foi tamb?m estudada a anatomia foliar de Orthophytum disjunctum, uma esp?cie de um g?nero irm?o de Cryptanthus, apenas recentemente documentada no semi?rido do RN. A compara??o anat?mica entre Cryptanthus e Orthophytum permitiu a separa??o dos g?neros com base na disposi??o dos est?matos e maior espessura do par?nquima aqu?fero. Durante os trabalhos de campo, foi poss?vel, ainda, documentar a primeira ocorr?ncia de Aechmea muricata no RN, na RPPN Mata Estrela, auxiliando no entendimento da distribui??o do t?xon, que encontra-se amea?ado de extin??o. === The taxonomic delimitation at the species level in plants is not an easy task due to the large polymorphism of plants. In this project we aimed to evaluate three morphotypes (forms) of Cryptanthus zonatus (Vis.) Beer ( Bromeliaceae, Bromelioideae ) described in the literature using fl oral biology and phenology, as well as flo ral morphology and leaf anatomy . These studies were conducted in the Parque Estadual das Dunas de Natal, Rio Grande Norte (RN) and Private Reserve of Natural Patrimony Mata Estrela , in the municipality of Ba ? a Form osa. The survey of the phenology of the morphotypes involved monthly specimen observation in the field, during one year. In each visit, we observed the status of flowering and fruiting phenophases of the population of the three forms of C. zonatus . For flo ral biology we sought to evaluate data like: observed floral visitors, nectar volume and concentration, time of anthesis and closing of flowers . Flowers of the three fo rms were collected in the field , analyzed by stereomicroscope, and measurements of the f loral pieces were made with the help of a caliper . Transversal and paradermal sections of the leaves of the three forms were stained and then examined under an optical microscope. Observations of the epidermis under scanning electron microscopy were also conducted. The three m orphotypes could not be sepated based on all evidence investigated. Thus, we conclude that there is not evidences to support the recognition of C. zonatus morphotypes as taxonomic entities, and also that the tools of phenology, anatomy, biology and floral morphology were not useful to delimit these three forms . Yet to characterize better the Flora of Bromeli aceae of RN, the leaf anatomy of Orthophytum disjunctum was also studied. Orthophytum is the sister genus to Cryptanthus and only recently documented in the semiarid of RN. The anatomical comparison between Cryptanthus and Orthophytum allowed the separatio n of both genera based on the arrangement of stomata and thickness of aquiferous par?nquima . During the fieldwork, it was still possible to document the first occurrence of Aechmea muricata in RN, inside the Mata Estrela preserve, aiding the understanding of the distribution of the taxon that is currently threatened with extinction.