Does rainfall affect the antioxidant capacity and production of phenolic compounds of an important medicinal species?

Araújo, Thiago Antǒnio de Sousa; Castro, Valérium Thijan Nobre de Almeida e; Solon, Lilian Grace da Silva; Araújo-Silva, Gabriel; Almeida, Maria das Graças; Costa, José Galberto Martins da; Amorim, Elba Lúcia Cavalcanti de; Albuquerque, Ulysses Paulino

doi:10.1016/j.indcrop.2015.07.008

Cited by 21 publications

(6 citation statements)

References 31 publications

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“…This result corroborates with other studies that have shown that environmental factors may affect certain chemical compounds, while in others they have no influence on their production [22,23].…”

Section: Discussionsupporting

confidence: 92%

Larvicidal evaluation of the Origanum majorana L. Essential Oil against the larvae of the Aedes aegypti mosquito

Chaves

Martins

Rodrigues

et al. 2019

Preprint

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This study evaluated the larvicidal activity of O. majorana essential oil, identified the chemical composition, evaluated the antimicrobial, cytotoxic and antioxidant potential. The larvicidal activity was evaluated against larvae of the third stage of Aedes aegypti, whereas the chemical composition was identified by gas chromatography coupled to mass spectrometer, the antimicrobial activity was carried out against the bacteria Pseudomonas aeruginosa, Escherichia coli and Staphylococcus auereus, the antioxidant activity was evaluated from of 2.2-diphenyl-1-picryl-hydrazila sequestration and Artemia salina cytotoxicity. Regarding to the results, the larvicidal activity showed that O. majorana essential oil caused high mortality in A. aegypti larvae. In the chromatographic analysis, the main component found in O. majorana essential oil was pulegone (57.05%), followed by the other components verbenone (16.92%), trans-p-menthan-2-one (8.57%), iso-menthone (5.58%), piperitone (2.83%), 3-octanol (2.35%) and isopulegol (1.47%). The antimicrobial activity showed that E. coli and P. aeruginosa bacteria were more sensitive to oil than S. aureus, which was resistant at all concentrations. Essential oil did not present antioxidant activity, but it has high cytotoxic activity against A. salina.

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Section: Discussionsupporting

confidence: 92%

Larvicidal evaluation of the Origanum majorana L. Essential Oil against the larvae of the Aedes aegypti mosquito

Chaves

Martins

Rodrigues

et al. 2019

Preprint

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“…There is no consensus on the effect of rainfall index in the biological activity of plants, both positive and negative correlations are reported. 20,21 Our results corroborate with several reports which showed positive effects of rainfall on the biological activity of plant extracts. 20,21 The influence of rainfall on the phytochemical composition of A. colubrina extracts was first analyzed by TLC based assay.…”

Section: Discussionsupporting

confidence: 91%

“…Gallic acid, quercetin (and its derivatives) had already been Results are expressed in mg/mL detected in the extracts from A. colubrina. 6,21 Antimicrobial activity of plants is commonly attributed to these compounds.…”

Section: Effects Of Rainfall On Phytochemical Composition Of Anadenanmentioning

confidence: 99%

Effects of Rainfall on the Antimicrobial Activity and Secondary Metabolites Contents of Leaves and Fruits of Anadenanthera colubrina from Caatinga Area

Araújo¹,

Silva²,

Harand³

et al. 2017

Phcog J

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Background: Anadenanthera colubrina (Vell.) Brenan var. cebil (Griseb) is a plant widely used for medicinal proposes in Brazilian Northeast. Objective: This study aimed to analyze the influence of rainfall indexes (RI) in antimicrobial activity and phytochemical constituents of extracts from leaves and fruits of A. colubrina. Material and Methods: Samples were collected in Catimbau National Park (Buíque, Pernambuco, Brazil) at September 2010 (RI: 75 mm) and January (RI: 65 mm), April (RI: 162 mm) and June 2011 (RI: 73 mm). The extracts were prepared by Soxhlet extraction using cyclohexane, chloroform, ethyl acetate and methanol. The antimicrobial activity was determined by MIC and MBC values. Results: All extracts showed antimicrobial activity, but ethyl acetate extracts (from all periods) were more active. Strong correlations were found between the RI and the average MIC of MLE (ρ: -0.99), EALE (ρ: -0.81), CHFE (ρ: -0.81), EAFE (ρ: -0.80); while moderate and weak correlations were found for other extracts. Through a HPLC analysis was possible to reveal that the samples collected from dry periods had more chemical diversity (as they presented more peaks). Gallic acid and quercetin (and derivative compounds) were identified. The levels of quercetin were enhanced in extracts from dry months. Conclusion: Our results showed that the rainfall has a positive effect on the antimicrobial activity of leaves and fruits of A. colubrina, however these extracts showed more chemical diversity during dry months.

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“…Several studies have shown that both total and individual phenolic compounds have even changed in the same species due to geographical factors [ 37 , 39 , 53 ]. In addition to geographical factors, the amount of rainfall or drought between years can significantly influence the phytochemical composition of plant extracts [ 54 ]. For example, several researchers have reported that the production of secondary metabolites (especially the amount of phenolics) has increased against drought stress [ 55 , 56 ].…”

Section: Resultsmentioning

confidence: 99%

Shedding Light into the Connection between Chemical Components and Biological Effects of Extracts from Epilobium hirsutum: Is It a Potent Source of Bioactive Agents from Natural Treasure?

Zengin

Mahomoodally

et al. 2021

Antioxidants

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Epilobium hirsutum is extensively used as a traditional remedy in folk medicine, especially against prostate inflammation. Therefore, we evaluated the chemical profiles and biopharmaceutical potentials of different extracts of E. hirsutum aerial parts and roots. Metabolomic, antioxidant, and enzyme inhibitory profiles were investigated. Human prostate cancer PC3 cells were exposed to the extracts to evaluate antiproliferative effects. Gene expression and bioinformatics analyses were performed to investigate anti-inflammatory mechanisms. Oenothein B and myricetin were prominent compounds in the extracts. In scavenging/reducing assays, the methanol, infusion, and methanol/water extracts exhibited similar activities. We also observed the reduction of PC3 viability occurring following exposure to methanol and methanol/water extracts. According to bioinformatics analysis, myricetin was predicted to interact with COX-2 and TNFα. The interaction between TNFα and oxo-dihydroxy-octadecenoic acid was predicted as well. Intriguingly, the gene expression of COX-2 and TNFα was reduced in PC3 cells after exposure to methanol and methanol/water extracts. These effects were paralleled by the decreased gene expression of IL-8 and NFkB and the inhibition of PGE2 release. Therefore, the present findings suggest the potential use of E. hirsutum for the management of the burden of inflammation and oxidative stress occurring in lower urinary tract diseases, including prostatitis.

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Does rainfall affect the antioxidant capacity and production of phenolic compounds of an important medicinal species?

Cited by 21 publications

References 31 publications

Larvicidal evaluation of the Origanum majorana L. Essential Oil against the larvae of the Aedes aegypti mosquito

Larvicidal evaluation of the Origanum majorana L. Essential Oil against the larvae of the Aedes aegypti mosquito

Effects of Rainfall on the Antimicrobial Activity and Secondary Metabolites Contents of Leaves and Fruits of Anadenanthera colubrina from Caatinga Area

Shedding Light into the Connection between Chemical Components and Biological Effects of Extracts from Epilobium hirsutum: Is It a Potent Source of Bioactive Agents from Natural Treasure?

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