Potencial alelopático e identificação dos metabólitos secundários em extratos de Canavalia ensiformis L.

Pereira, José Roberto; Paulino, Cynthiane Lins de Albuquerque; Granja, Bruna da Silva; Santana, Antônio Euzébio Goulart; Endres, Laurício; Souza, Renan Cantalice de

doi:10.1590/0034-737x201865030004

Cited by 13 publications

(13 citation statements)

References 36 publications

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“…The data obtained herein corroborate the results in the literature, where researchers have identified that phenolic compounds such as: caffeic acid, chlorogenic acid, gallic acid and flavonoid compounds, including quercetin, are responsible for the inhibition of germination (Cantanhede-Filho et al 2017, Pereira et al 2018.…”

Section: Discussionsupporting

confidence: 90%

“…Among the dysfunctions triggered by flavonoid compounds, stands out the modulation in the levels of reactive oxygen species, which leads to the peroxidation of membranes and fundamental enzymes in the germination process (Ferreira & Áquila 2000, Pereira et al 2018. But also, phenols, which exert interference in the germination process as a whole, in addition to causing damage to membrane permeability by raising oxidative enzyme activity as well as early root lignification, interfering with the process of organ absorption and development (Bubna et al 2011, Pereira et al 2018.…”

Section: Discussionmentioning

confidence: 99%

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Conyza sumatrensis allelopathy effect on Bidens pilosa (Asteraceae) seed germination

et al. 2020

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Background: Other tools for weed management should be considered in addition to the use of herbicides. In this context, the identification and use of allelopathic compounds deserves attention. Question: To quantify phenolic compounds and evaluate the allelopathic potential of extracts of Conyza sumatrensis on the germination of Bidens pilosa. Studied species: Conyza sumatrensis (Retz.) E.Walker, Bidens pilosa L. (Asteraceae) Study site: Palotina, state of Paraná, Brazil. Methods: The aqueous extracts were prepared with shoot and root portions of C. sumatrensis in concentrations: 0, 1, 5 and 10 %. Germination and germination speed index were evaluated. The total flavonoids and phenols of the tested extracts were also quantified. Results: With increasing concentrations of the extracts there was an increased inhibition of germination of B. pilosa and delays in the germination process. The extracts from the shoot of C. sumatrensis had a more expressive effect on seed germination when compared to the extracts obtained from the root. At concentration of 10 %, the extract from the shoot reduced in 83 % the percentage of germination. This may be related to the higher concentration of total flavonoids and phenols found. Conclusion: The allelopathic potential of C. sumatrensis plants can be considered since both shoot and root extracts inhibited and/or reduced the germination of B. pilosa.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Conyza sumatrensis allelopathy effect on Bidens pilosa (Asteraceae) seed germination

et al. 2020

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“…In general, the effects caused by allelochemicals tend to be concentration-dependent, that is, they tend to be more pronounced at higher concentrations, and this tendency is observed in the initial growth bioassays in recent studies with leaf extract of Kielmeyera coriacea, Canavalia ensiformis and Anacardium humile, on L. sativa (Santos et al, 2015;Pereira et al, 2018;Matias et al, 2018).…”

Section: Resultsmentioning

confidence: 96%

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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“…To check for existing phenolic compounds in the leaves and roots of the tested plant, some standards were selected, obtained from Sigma-Aldrich and AcrosOrganics, to compare them with the compounds present. The secondary compounds utilized in this study were chosen according to their participation in allelopathic phenomena described in literature (Santos & Rezende, 2008;Oliveira et al, 2014;Fiorenza et al, 2016;Franco et al, 2016;Peloi et al, 2016;Pereira et al, 2018), namely: gallic acid, catechol, vanillic acid, salicylic acid, vanillin, syringaldehyde, coumaric acid, chlorogenic acid, coumarin, rutin, quercetin, kaempferol, and caffeic acid. All solvents utilized in chromatography were of analytical grade; methanol (Panreac), formic acid (dynamic) and ultrapure water obtained from a Milli-Q system.…”

Section: Methodsmentioning

confidence: 99%

Allelopathic activity of broom (Scoparia dulcis L.) on the germination of invasive plants

Ferreira

Franco

Santos

et al. 2020

Agraria

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Allelopathy is characterized by effects on plant germination or development caused by chemicals released by other plants. This work aimed to verify the allelopathic activity of Scoparia dulcis leaves and roots in weeds and lettuce, as well as to determine the phenolic compounds present in the studied plant. The experiment was arranged in a 2 x 5 factorial design, with six replications of 15 seeds each. The seeds were placed to germinate in agar layers, and after ten days were evaluated the germination percentage, shoot length and root primary length. Phytochemical analysis using high performance liquid chromatography was also carried out, in which the samples were injected three times in the chromatographic system to obtain the average concentrations and retention times, allowing to identify and quantify the studied metabolites. The results showed that this species has allelopathic potential, as it interfered in the development of all receiving plants studied, and the inhibitory action exerted by the leaves was more significant/ou intense on the analyzed variables. On the other hand, the roots presented a larger total amount of phenolic compounds, being caffeic acid found in greater amount both in the roots and leaves.

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Potencial alelopático e identificação dos metabólitos secundários em extratos de Canavalia ensiformis L.

Cited by 13 publications

References 36 publications

Conyza sumatrensis allelopathy effect on Bidens pilosa (Asteraceae) seed germination

Conyza sumatrensis allelopathy effect on Bidens pilosa (Asteraceae) seed germination

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

Allelopathic activity of broom (Scoparia dulcis L.) on the germination of invasive plants

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