Morfologia de sementes e do desenvolvimento pós-seminal de espécies de Bromeliaceae

Pereira, Alba Regina; Pereira, Tânia Sampaio; Rodrigues, A. S.; Andrade, Antônio Carlos Silva de

doi:10.1590/s0102-33062008000400026

Cited by 31 publications

(47 citation statements)

References 12 publications

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“…The same measurements were performed in 150 whole seeds 15 different individuals, according to methodology adopted by Pereira et al (2008).…”

Section: Methodsmentioning

confidence: 99%

“…Seed external characterization was performed according to procedures adopted by Pereira et al (2008), in which we analyzed integument color, texture, and consistency. The thousand seed weight was obtained multiplying the average of eight 100-whole-seed weightings by 10, which were freshly harvested and chosen at random (BRASIL, 2009).…”

Section: Methodsmentioning

confidence: 99%

“…After sowing, we made a daily description of germination process and seedling morphological characterization over a period of 20 days. In short, we evaluated the germination type, sequence and timing of the development of each seedling part, the presence of trichome and their distribution, besides the coloring of structures, all according to Pereira et al (2008).…”

Section: Methodsmentioning

confidence: 99%

“…Nevertheless, it is noteworthy mention that certain circumstances as the high degree of endemism, Atlantic Forest degradation and fragmentation, which houses near 81.8% of the known species, combined with deforestation and indiscriminant extraction have considerably increased endangering of several bromeliad species. Additionally, predatory sampling for commercialization and depredation of natural environments are taken as the main cause of extinction or drastic reduction of numerous species (PEREIRA et al, 2008). Among these species, we can mention Aechmea costantinii that is endemic to the Atlantic Forest within Northeastern São Francisco River, which encompass the states of Alagoas, Pernambuco, Paraíba and Rio Grande do Norte in Brazil.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the knowledge on the morphology of seedlings is the basis for succession and regeneration studies of natural ecosystems, referring the seedlings as a functional adaptation to the environment and are associated with environmental factors, such as mother plant lifecycle, seed dispersibility and regeneration strategies, which justifies the characterization studies (PEREIRA et al, 2008;OLIVEIRA et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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SEED MORPHOMETRY AND GERMINATION OF Aechmea costantinii (Mez) L. B. Sm. (BROMELIACEAE)

et al. 2016

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-The potential economic and environmental benefits brought by bromeliads production are significant. It is noteworthy that the high degree of degradation of some ecosystems as the Atlantic forest involve reduction of these species. This factor has been worsened by the elevated degree of endemism of these plants, e.g. Aechmea costantinii (Mez) L. B. Sm., which is a high ornamental potential bromeliad but understudied. Thus, the present research aimed to characterize physical and morphological features of A. costantinii fruit and seeds, describing the different stages of post-seminal development, as well as evaluating seed germination behavior with respect to temperature and light. For this purpose, we used fruit and seeds freshly harvested from an Atlantic Forest fragment, located in the city of Maceió, Alagoas State, Brazil. Tests were carried out under a completely randomized design, in a 6x4 factorial scheme (temperature x light) with four replications of 25 seeds. The polyspermic fruit are of tricarpellate/triloculate type and originated from inferior ovary, containing an average of 73 elliptical and mucilaginous seeds with basal embryo. The germination is epigeal-type and occurs in a great intensity and high speed at 35 °C, regardless light presence or quality.Key words: Bromeliad. Light. Temperature. Atlantic forest. MORFOMETRIA E GERMINAÇÃO DE SEMENTES DE Aechmea costantinii (Mez) L. B. Sm. (BROMELIACEAE)1 RESUMO -O potencial econômico e os benefícios ambientais que as bromélias podem proporcionar por meio de sua produção são significantes. Salienta-se que em virtude do alto grau de degradação da Mata Atlântica, essas espécies têm sido reduzidas, fator agravado pelo elevado grau de endemismo destas, a exemplo da Aechmea costantinii (Mez) L. B. Sm., que é uma bromélia de alto potencial ornamental, porém pouco estudada. Dessa forma, o trabalho teve como objetivo a caracterização física e morfológica dos frutos e sementes, descrição das diferentes fases do desenvolvimento pós-seminal, bem como a avaliação do comportamento germinativo das sementes em função da temperatura e da luz. Para a condução do trabalho, utilizaram-se frutos e sementes recém colhidos de um fragmento de Mata Atlântica, no município de Maceió, Alagoas, Brasil. Os ensaios foram conduzidos sob delineamento inteiramente casualizado, em esquema fatorial 6x4 (temperatura x luz) com quatro repetições de 25 sementes. Os frutos polispérmicos do tipo tricarpelar/trilocular, indeiscentes, são originados de ovário ínfero, contendo em média 73 sementes elípticas, mucilaginosas, com embrião basal. A germinação é do tipo epígea, ocorrendo em maior intensidade e velocidade a 35 o C, independente da presença e qualidade de luz.Palavras-chave: Bromélia. Luz. Temperatura. Mata Atlântica.

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“…The same measurements were performed in 150 whole seeds 15 different individuals, according to methodology adopted by Pereira et al (2008).…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%