Alelopatia de espécies vegetais com importância farmacêutica para espécies cultivadas

Gusman, Grasielle Soares; Vieira, Licielo Romero; Vestena, Silvane

doi:10.5007/2175-7925.2012v25n4p37

Cited by 10 publications

(11 citation statements)

References 27 publications

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“…Inhibition of root growth should be considered satisfactory to verify the existence of phytotoxic potential. These results were congruent with those obtained by Gusman et al (2012) in bioassays with aqueous leaf extracts of different medicinal plants on the initial growth of lettuce that demonstrated a more pronounced allelopathic effect on root length than on aerial part. Chung et al (2001) suggest that the difference between these effects is due to the direct and more prolonged contact of the root with the medium containing the allelochemical compounds, than the other parts of the plant.…”

Section: Resultssupporting

confidence: 89%

Phytotoxic potential of aqueous leaf extract of Tocoyena formosa and Rudgea viburnoides

et al. 2019

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Plants have organic components produced as secondary metabolites able to positively or negatively interfere on normal development of other species. The objective of this research was to determine the phytotoxic effects of aqueous leaf extract from two species Rubiaceae family: Tocoyena formosa and Rudgea viburnoides on the germination and initial development of lettuce (Lactuca sativa L). The extract was obtained from mixing 50 g of fresh leaf and 500 mL of distilled water. The experiment was arranged in completely randomized design for each specie, subjected to five extract concentrations: 0, 25, 50, 75 and 100%; and 4 repetitions of 50 seed each. The bioassays were performed in laboratory at controlled temperature and luminosity during seven days. Results showed that the aqueous extract of both species do not affected the germination and the percent of abnormal lettuce seedlings. R. viburnoides showed no pronounced difference in relation to shoot length and dry biomass; however, the root length was reduced by 85%. The extract of T. formosa at higher concentrations, drastically reduce the dry biomass and length of shoots and roots. Therefore, both species have phytotoxic effect on seedling growth of lettuce being the length root the most affected variable.

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Section: Resultssupporting

confidence: 89%

Phytotoxic potential of aqueous leaf extract of Tocoyena formosa and Rudgea viburnoides

et al. 2019

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“…This relationship was best fitted by linear regression equations for soil and paper and by a quadratic regression equation for sand, with a minimum speed of germination at 73% extract. This result is in accordance with the results of Gusman et al (2012), who tested purple nuts edge aqueous extracts on tomato and rocket salad seeds and observed a decreased speed of germination index starting at 30% extract concentration when compared to the control treatment.…”

Section: Lettuce Experimentssupporting

confidence: 92%

“…This result shows the potential of purple nuts edge extract to decrease seed germination, especially for lettuce. Gusman et al (2012) evaluated the allelopathic effect of certain pharmaceutically important plant species on several different crops, including lettuce, and observed a decrease in lettuce germination proportional to increasing extract concentrations, similar to the effect observed in this present study. Periotto et al (2004) observed the sensitivity of lettuce and radish germination to different concentrations of aqueous extracts of Andira humilis Mart.…”

Section: Lettuce Experimentssupporting

confidence: 81%

Evaluation of physiological quality of lettuce and rocket salad seeds in the presence of purple nuts edget extract

Gomes¹,

Oliveira²,

Pelosi³

et al. 2016

Afr. J. Agric. Res.

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Purple nuts edge (Cyperus rotundus L.) is responsible for great losses in crop production areas. Purple nuts edge tubers possess substances with allelopathic effects on certain crops. The aim of this study was to evaluate the physiological quality of lettuce and rocket salad seeds grown on different substrates in the presence of purple nuts edge extract. A completely randomized experimental design was used with a 3×5 factorial scheme (three substrates × five doses of purple nuts edge extract) and four replicates of 50 seeds. The extract was diluted to four different concentrations (25, 50, 75 and 100%), and distilled water was used as a control treatment (0%). Seeds were sown in three different substrates: Germitest paper, sand or soil. The first and second germination count, the total germination and the germination speed index were evaluated. Lettuce germination was affected by the application of purple nuts edge extract to the tested substrates. Lower germination percentages were observed for sand than for the remaining tested substrates. The application of purple nuts edge extract did not affect the evaluated germination parameters for rocket salad seeds. The germination of lettuce and rocket salad seeds was higher with soil as substrate.

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“…Ressalta-se que as substâncias produzidas pelas plantas podem ser utilizadas no controle natural de espécies daninhas em culturas de interesse, auxiliando na redução do lançamento de contaminantes no ambiente e na preservação de recursos naturais. (GUSMAN et al, 2012).…”

Section: Introductionunclassified

EXTRATOS DE ALECRIM SÃO ALELOPÁTICOS À GERMINAÇÃO DE Eruca sativa L.?

Zortéa¹,

Freitas²,

Simão³

et al. 2015

Enciclopédia Biosfera

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RESUMO A alelopatia é o efeito inibitório ou benéfico, direto ou indireto, de uma planta sobre outra, por meio da produção de compostos químicos. Rosmarinus officinalis L. popularmente conhecida como alecrim, é utilizada desde a antiguidade. Neste trabalho objetivou-se determinar se os extratos de alecrim são alelopáticos à germinação de Eruca sativa L. Foram utilizados dois tipos de extratos: seco e fresco. O extrato de folhas secas, obtido por meio de 10g de folhas secas, fervidas por 10 minutos em 100ml de água destilada. O extrato das folhas frescas não foi fervido sendo obtido de 10g de folhas trituradas em liquidificador com 100ml de água destilada. Foram utilizadas 5 concentrações de cada extrato: 10%, 25%, 50%, 75%, 100% e água destilada como controle. O experimento foi conduzido em delineamento inteiramente casualizado (DIC), os tratamentos foram arranjadas em esquema fatorial 2 x 5 + 1, sendo dois tipos de extratos, cinco concentrações e um tratamento controle (água), com 4 repetições. Avaliou-se as variáveis primeira contagem, % de germinação, Índice de Velocidade de Germinação (IVG), comprimento das raízes e comprimento da parte aérea. Os dois extratos influenciaram a primeira contagem, a % de germinação e o IVG das sementes de rúcula, apresentando efeito de regressão quadrática conforme o aumento das concentrações. O comprimento da parte aérea e das raízes das plântulas apresentou diminuição com o aumento da concentração dos extratos de folhas secas e para o extrato de folhas frescas não houve efeito. R. officinalis é alelopático à germinação e desenvolvimento inicial de E. sativa. PALAVRAS-CHAVE: Herbicida natural, Hortaliças, Inibidores de germinação. EXTRACTS OF ROSEMARY ALLELOPATHIC ARE IN GERMINATION Eruca sativa L.? ABSTRACT Allelopathy is the inhibitory effect or beneficial, direct or indirect, of one plant on another, through the production of chemical compounds. Rosmarinus officinalis L. popularly known as alecrim, is used since antiquity. This study aimed to determine whether the rosemary extracts are allelopathic to germination Eruca sativa L .. We

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Alelopatia de espécies vegetais com importância farmacêutica para espécies cultivadas

Cited by 10 publications

References 27 publications

Phytotoxic potential of aqueous leaf extract of Tocoyena formosa and Rudgea viburnoides

Phytotoxic potential of aqueous leaf extract of Tocoyena formosa and Rudgea viburnoides

Evaluation of physiological quality of lettuce and rocket salad seeds in the presence of purple nuts edget extract

EXTRATOS DE ALECRIM SÃO ALELOPÁTICOS À GERMINAÇÃO DE Eruca sativa L.?

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