2016
DOI: 10.18227/1982-8470ragro.v10i3.3555
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Efeito alelopático de Raphanus sativus em Urochloa decumbens e Lactuca sativa

Abstract: Resumo: Objetivou-se com este trabalho avaliar o potencial alelopático de extrato de folhas e raízes de Raphanus sativus, nas espécies Urochloa decumbens e Lactuca sativa L. Para obtenção do extrato, foram utilizadas separadamente folhas e raízes de R. sativus, trituradas na proporção de 200 g de folhas para 1 L de água, resultando no extrato aquoso bruto (100%). A partir desse extrato, foram realizadas as diluições de 60%, 40% e 20% e testemunha. Sementes de U. decumbens e L. sativa foram distribuídas uniform… Show more

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Cited by 3 publications
(2 citation statements)
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“…The latter, inhibited root growth significantly in the 50% and 75% concentrations ( Figure 3A). Navas and Pereira (2016) also reported decrease in the root growth of lettuce seedlings when exposed to the radish aqueous extract. The reduction in the maize seedling root system might be related to the presence of phenolic compounds (Table 1) The growth, the root system dry matter and shoot dry matter ( Figure 3B and Figures 4A-B), differently from what was observed int he root system length, was better adjusted by the second order polynomial model, in which the 25% concentration promoted increase in growth, root system dry matter and shoot dry matter.…”
Section: Maizementioning
confidence: 88%
“…The latter, inhibited root growth significantly in the 50% and 75% concentrations ( Figure 3A). Navas and Pereira (2016) also reported decrease in the root growth of lettuce seedlings when exposed to the radish aqueous extract. The reduction in the maize seedling root system might be related to the presence of phenolic compounds (Table 1) The growth, the root system dry matter and shoot dry matter ( Figure 3B and Figures 4A-B), differently from what was observed int he root system length, was better adjusted by the second order polynomial model, in which the 25% concentration promoted increase in growth, root system dry matter and shoot dry matter.…”
Section: Maizementioning
confidence: 88%
“…A alelopatia é resultado da interferência natural de compostos secundários liberados no meio ambiente, sendo que estes podem afetar uma planta direta ou indiretamente, resultando em efeitos danosos ou benéficos e, por isso, têm sido amplamente utilizada em benefício de culturas de interesse (MIRANDA et al, 2012;SILVA, 2012). A maioria dos compostos químicos provém do metabolismo secundário, que ocorre em diferentes partes da planta e que podem ser liberados no ambiente de diversas formas, estando amplamente relacionados aos mecanismos de defesa destas contra ataques de insetos, deficiência nutricional e reguladores vegetais (GUSMAN; YAMAGUSHI; VESTENA, 2011; MEDEIROS, 1990;NAVAS;PEREIRA, 2016).…”
Section: Introductionunclassified