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| SILVA,E.M.; PEREIRA,J.C.; FERREIRA,V.M.; SOUZA,R.C.. |
| ABSTRACT: The objective of the present work was to study the influence of temperature and light on germination of seeds of Stigmaphyllon blanchetii, popularly known as rat tail. The first stage of the research evaluated the effect of three constant temperatures (20 oC, 25 oC and 30 oC) and an alternating temperature (20-30 oC). In the second stage, for simulation of different types of light, four conditions of luminosity (white, red, far red and absence of light) were used. The temperatures that provided the best germination and development for S. blanchetii are the constant (30 oC) and the alternating (20-30 oC) ones. The seeds germinated both in the presence and absence of light, but there was greater germination and seedling development in the absence... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weed; Stigmaphyllon blanchetii; Photoblastism; Phytochrome. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100184 |
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| AZEVEDO,J.M.L.; SANTOS,C.G.G.; CAIRES,C.S.; ARAÚJO NETO,J.C.; SOUZA,R.C.. |
| ABSTRACT: The goal of this work was to characterize morphometrically diaspores from three species of mistletoes (Passovia pyrifolia, Struthanthus marginatus e Phoradendron mucronatum), as well as to study its germination behavior according to temperature and luminosity. In germination tests, the completely randomized design was used, in factor scheme 4 x 2, with 4 replications of 15 diaspores. The factors for the first test were different temperatures and two diaspore conditions (intact and without epicarp). In the second test, factors were different light qualities and two diaspore conditions. The analyzed variables were: germination percentage, germination rate index (GRI) and mean germination time (MGT). Mistletoe’s diaspores present an elliptic shape... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mistletoes; Temperature; Luminosity. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100218 |
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| PEREIRA,J.C.; PAULINO,C.L.A.; ENDRES,L.; SANTANA,A.E.G.; PEREIRA,F.R.S.; SOUZA,R.C.. |
| ABSTRACT: Allelopathy is defined as the ability of certain plants and microorganisms to interfere with the metabolism of other species through substances released into the environment, being an alternative to control weeds and diseases. In this context, this study aimed to evaluate the allelopathic potential and identify groups of secondary metabolites of Paspalum maritimum Trind. The species Lactuca sativa, Digitaria insularis, Emilia coccinea, and Portulaca oleracea were used as recipient plants. The ethanolic extract was obtained from shoot and root of donor species to evaluate the allelopathic potential. Potentially allelopathic effects were evaluated by means of germination tests, germination speed index, and initial seedling growth. A phytochemical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathy; Ginger grass; Secondary metabolites. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100251 |
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