Análise Fitoquímica e Atividade Antioxidante do Extrato Hidroetanólico das Folhas de Psidium guajava L. (Goiabeira)

Silva, Izabela Caputo Assis; Aleixo, Álan Alex; Aleixo, Ariane Marçal; Figueiredo, A. V. D.; Lemuchi, Mariane Oliveira; Lima, Luciana Alves Rodrigues dos Santos

doi:10.5433/2316-5200.2013v2n2espp76

Cited by 7 publications

(6 citation statements)

References 2 publications

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“…The phytochemical studies conducted on species belonging to the family Myrtaceae also revealed the absence of alkaloids and coumarins, which is a fact that corroborates the results found in P. cattleianum species. Such results indicate that these metabolites are probably absent in the chemical composition of this botanical family [38,41]. Table 2 shows the results of the Artemia salina toxicity tests.…”

Section: Resultsmentioning

confidence: 88%

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The Chemical Featuring, Toxicity, and Antimicrobial Activity of Psidium cattleianum (Myrtaceae) Leaves

Faleiro

Gonçalves

Santos

et al. 2016

New Journal of Science

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It is known that the phytochemical identification and assessment of biological effects caused by the constituent speciesPsidium cattleianum, which belongs to family Myrtaceae, are poorly held in the literature. The aim of the current study is to investigate the composition of secondary metabolites, the toxicity, and the antimicrobial activity ofP. cattleianumleaves. The crude ethanolic extract of the plant was obtained through maceration and fractionated with hexane, dichloromethane, and ethyl acetate. The crude ethanol extract and the fractions were subjected to phytochemical screening and tested against the microcrustaceanArtemia salinafor toxicological assessment. Antimicrobial tests with crude ethanol extract and the fractions were carried out through the agar diffusion method using broth microdilution againstStaphylococcus aureus,S. epidermidis,Burkholderia cepacia,andEscherichia colistrains. A variety of secondary metabolite groups such as catechins, steroids, phenolic compounds, flavonoids, and saponins was detected. Regarding toxicity, hexane and dichloromethane fractions were considered nontoxic, whereas the crude ethanol extract and the ethyl acetate fraction showed low toxicity. The crude ethanol extract and the fractions, except for the hexane fraction, showed activity against the tested strains. Therefore, the composition of the secondary metabolites, the low toxicity, and the antimicrobial activity suggest that this species is promising in the search and development of new drugs.

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Section: Resultsmentioning

confidence: 88%

“…Phytochemical investigations of several plants of economic importance are reported in several species of the family Myrtaceae. Silva et al [38] developed a phytochemical study on Psidium guajava (Guava) and reported the presence of chemical constituents such as tannins, flavonoids, saponins, and triterpenoids.…”

Section: Resultsmentioning

confidence: 99%

The Chemical Featuring, Toxicity, and Antimicrobial Activity of Psidium cattleianum (Myrtaceae) Leaves

Faleiro

Gonçalves

Santos

et al. 2016

New Journal of Science

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“…All these factors can promote a better interaction of the active ingredient with the solvent if the principles show affinity with the solvent used. Silva et al (2013) produced hydroethanolic extract of guava leaves. In their study, the authors reduced the moisture content of the leaves by drying in an oven at 40 °C for seven days and macerated the ground dried leaves in a 70% ethanol solution in water, also for 7 days.…”

Section: Extraction Yieldmentioning

confidence: 99%

Influence of temperature and time of exposure to temperature on the yield of the obtaining process of ethanolic and hydroethanolic extracts from Syzygium malaccense (L.) Merr. & L. M. Perry leaves

Sampaio

Silva

Ricciotti

et al. 2021

Int J Innov Educ Res

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The present study aimed to obtain alcoholic and hydroalcoholic (70% v/v) extract of Syzygium malaccense (L.) Merr. & L. M. Perry (red jambo fruit tree) leaves and investigated the influence of temperature and time of exposure to temperature on the extraction yield. It was applied a 2x2 factorial design, considering temperature and time of exposure as independent variables with two levels each: 30 or 60 °C for temperature and 60 or 120 minutes for time. For both ethanolic and hydroethanolic extraction, higher process yields were observed at higher temperature and time (24.26% and 19.00%, respectively), however, no significant difference was noticed when increasing the time of exposure to temperature.

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“…Dhiman [8] verified bacteriostatic and fungistatic effect from the methanolic vegetal extracts from guava leaves, and observed the presence of antiomicrobial compounds as flavonoids, steroids and tannins in the extracts, that may contribute to the antimicrobial effect of P. guajava. Similarly [30], verified the presence of saponins, different terpenoids and benzaldehyde in the hydroethanolic extract from guava, which according [31] are considered antimicrobial substances. Terpenoids protect plants against fungi, bacteria and herbivores [22].…”

Section: (C))mentioning

confidence: 99%

Alternative Control of Alternaria Brown Spot in Tangerine

Filho¹,

Corrêa²,

Moura³

et al. 2020

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Alternaria brown spot is considered the main disease of tangerines in the State of Paraiba. The objective of work was to evaluate vegetal tinctures from bitter melon (Momordica charantia) and guava (Psidium guajava) leaves, as an alternative control for Alternaria brown spot in tangerine. The effects of vegetal tinctures were tested in leaves and fruits (detached) of tangerine "Dancy" inoculated with tangerine pathotype of Alternaria alternata. The effect of tinctures on mycelium growth and spore germination of the pathogen was tested. Tinctures at 20% concentration promoted reduction of disease severity. A reduction of 80% in the diameter of leaf lesions was observed for bitter melon tinctures and 75.3% for guava tinctures. In fruits, the reduction was 48.4% (bitter melon tinctures) and 43.3% (guava tinctures). Guava tinctures, starting at a concentration of 5%, inhibited 100% of mycelium growth of tangerine pathotype of A. alternata, while the use of bitter melon tinctures inhibited 100% of mycelium growth starting at a concentration of 10%. The greater sensitivity to tinctures observed when these were added to the culture medium when compared to inoculation in leaves and fruits may be explained due to the higher exposition of the pathogen to the active principle when the vegetal tinctures were added to the culture medium, than when tinctures were sprayed over the vegetal surface in fruits and leaves. The number of germinated spores decreases 76.7% and 82% when using tinctures from guava and bitter melon (20%). Tinctures from bitter melon and guava are potential tools for alternative management of the Alternaria brown spot in tangerine "Dancy".

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Análise Fitoquímica e Atividade Antioxidante do Extrato Hidroetanólico das Folhas de Psidium guajava L. (Goiabeira)

Cited by 7 publications

References 2 publications

The Chemical Featuring, Toxicity, and Antimicrobial Activity of Psidium cattleianum (Myrtaceae) Leaves

The Chemical Featuring, Toxicity, and Antimicrobial Activity of Psidium cattleianum (Myrtaceae) Leaves

Influence of temperature and time of exposure to temperature on the yield of the obtaining process of ethanolic and hydroethanolic extracts from Syzygium malaccense (L.) Merr. & L. M. Perry leaves

Alternative Control of Alternaria Brown Spot in Tangerine

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