Propagação de Piper Marginatum Jacq.: qualidade de luz na germinação in vitro de sementes e níveis de iluminação na estaquia
Piper marginatum Jacq. is an Amazonian Piperaceae, popularly known as capeba, malvarisco, pimenta-do-mato, capeba-cheirosa and nhandi. It is used mainly in the region as a remedy against liver diseases, vesicular diseases, muscular spasms, snake and insect bites and for the relief of intestinal g...
| Autor principal: | Cabral, Lorena de Paula |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/5305 http://lattes.cnpq.br/5550608085656072 |
| Resumo: |
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Piper marginatum Jacq. is an Amazonian Piperaceae, popularly known as capeba,
malvarisco, pimenta-do-mato, capeba-cheirosa and nhandi. It is used mainly in the
region as a remedy against liver diseases, vesicular diseases, muscular spasms,
snake and insect bites and for the relief of intestinal gases; in cooking is used to replace
the black pepper; and there are scientific reports that leaf extract and essential oil have
biological activities such as cercaricida, insecticide, acaricide and fungicide. Its
collection is done indiscriminately through the ripening of its vegetative and
reproductive parts, which in the long run can exert negative effects on the natural
populations. In the literature, there are reports that the propagation of this species has
some limitations. In general, seeds have low germination rates, both in the field and in
vitro, and low rooting rates in vegetative propagation, via cuttings. Therefore, this work
aimed to investigate more efficient methods of reproduction. The influence of the light
quality on germination in vitro was evaluated through a DIC experiment, using five light
filters: red, far-red, green, blue and transparent and evaluated the germination (%),
germination speed index (GSI) and mean germination time (MGT). The germination
was not significantly influenced by the light filters, unlike the GSI and MGT that
presented the best performances under the red light. In the vegetative propagation,
the experiment was installed in DIC, with a factorial scheme of 2 x 3, two types of
shading of the mother plant (full sun and shaded to 50%) and three types of cuttings
(apical, median and basal). The variables analyzed were: survival (%), rooting (%),
number of shoots, number of leaves, length of the highest root, root dry mass and
shoot dry mass. The apical cuttings of Piper marginatum presented better performance
in the propagation by cutting, followed by the basal and, finally, medium, which, in
general, are independent of the shading of the matrix plant. |