potencial alelopático de extratos aquosos de genótipos de canola sobre bidens pilosa allelopathic potential of aqueous extracts of canola genotypes on bidens pilosa

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ID: 244118
2008
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Abstract
O objetivo deste trabalho foi avaliar o efeito de extratos aquosos de plantas de genótipos de canola na germinação e comprimento da radícula de picão-preto (Bidens pilosa). Os tratamentos estudados foram constituídos dos genótipos de canola Hyola 420, Hyola 401, Hyola 43, Hyola 60, Hyola 61, Y 3000, H 1432, Dln 03-02, Dln 03-04, Sdh 03-01, Sdh 03-07, Sw-2797 e Sw-Eclipse, nas concentrações de extrato aquoso a 100, 75, 50, 25 e 0%. O delineamento experimental foi inteiramente casualizado, em esquema fatorial com dois fatores 12 x 4 (genótipos e concentração do extrato), com quatro repetições. O experimento foi conduzido em caixas gerbox com papel de germinação embebido nos extratos das plantas de canola, sobre os quais foram dispostos aquênios de picão-preto. Sete dias após a semeadura, avaliou-se o número de aquênios germinados e o comprimento das radículas. Os resultados revelaram que os extratos de canola influenciam negativamente a germinação de aquênios e o comprimento da radícula de Bidens pilosa. Para alguns genótipos, as baixas concentrações de extratos estimularam tanto o crescimento da radícula quanto a porcentagem de germinação dos aquênios; em altas concentrações, os genótipos não diferiram na germinação dos aquênios e no comprimento da radícula.
The objective of this experiment was to evaluate the effect of aqueous extract of plants of canola genotypes on the germination and radicle length of hairy beggartick (Bidens pilosa). The treatments consisted of genotypes of canola Hyola 420, Hyola 401, Hyola 43, Hyola 60, Hyola 61, Y 3000, H 1432, Dln 03-02, Dln 03-04, Sdh 03-01, Sdh 03-07, sw-2797, and Sw-Eclipse. The concentrations of aqueous extract of 100, 75, 50, 25 and 0 % were tested. A completely randomized experimental design was used in a factorial 12 x 4 (genotypes and extract concentrations) with four replications. The experiment was carried out in plastic boxes containing ot the bottom blotter paper moistened with the aqueous extract, where the hairy beggartick achenes were seeded. Seven days later, the number of germinated achenes was evaluated and the length of radicles measured. The results showed that the canola extracts negatively influenced achene germination and radicle length. The effects increased with increased extract concentrations. At low concentration, some genotype extracts presented a stimulating effect. The results showed that the variability among canola genotypes was only evident at low extract concentrations.
Reference Key
rizzardi2008plantapotencial Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;A. Rizzardi;M.A. Rizzardi;T.D. Lamb;L.B. Johann
Journal anti-cancer agents in medicinal chemistry
Year 2008
DOI
10.1590/S0100-83582008000400002
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582008000400002
Keywords
brassica napus alelopatia oleiferabiology (general)botany

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