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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.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19320 |
| Date | 18 December 2013 |
| Creators | Magalh?es, Raissa Elizabeth de Castro |
| Contributors | 08484748723, http://lattes.cnpq.br/7557922092763217, Vieira, Fabio de Almeida, 01196769664, http://lattes.cnpq.br/1649941101614454, Sousa, Leandro de Oliveira Furtado de, 07787461780, http://lattes.cnpq.br/8157923398404157, Versieux, Leonardo de Melo, Versieux, Alice de Moraes Calvente |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM SISTEM?TICA E EVOLU??O, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/embargoedAccess |
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