&lt;b&gt;The influence of planting and harvesting times on the total phenolic content and antioxidant activity of &lt;i&gt;Talinum triangulare&lt;/i&gt; (Jacq.) Willd

Brasileiro, Beatriz Gonçalves; Leite, João Paulo Viana; Casali, Vicente Wagner Dias; Pizziolo, Virgínia Ramos; Coelho, Olívia Gonçalves Leão

doi:10.4025/actasciagron.v37i2.19130

Cited by 23 publications

(19 citation statements)

References 34 publications

(19 reference statements)

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“…Antioxidant properties of leafy vegetables tracts, which is in agreement with reports relating polyphenolic profile in leafy vegetables subjected to some agronomic and environmental factors including nutrient supply and harvest time (Brasileiro et al, 2015;Sossa-Vihotogbé et al, 2013a;Stefanelli et al, 2011;Tavarini et al, 2015). Uses of urea micro-doses and/or cattle manure were beneficial for polyphenolic compounds synthesis, which is consistent with reports on the effect of organic fertilizer associated with moderate doses of mineral fertilizer in promoting synthesis and availability of polyphenols within leafy vegetables (Sossa-Vihotogbé et al, 2013a).…”

Section: Polyphenols Profile As Affected By Fertilizer Micro-dose Andsupporting

confidence: 90%

“…These leafy vegetables are grown in various ecological zones and are often harvested on staggered timing after maturity (Achigan-Dako et al, 2010). They are inexpensive and rich sources of nutrients such as minerals, vitamins, carotenoids and polyphenols (Vodouhe et al, 2012), although their nutrient profiles are affected by agronomic and environmental factors including soil type, water and nutrient supply, cultivation methods and harvest time (Brasileiro et al, 2015;Sossa-Vihotogbé et al, 2013a;Tavarini et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Fertilizer micro-dosing and harvesting time of indigenous leafy vegetables affect in vitro antioxidant activities

Moussa¹,

Alashi²,

Sossa-Vihotogbe³

et al. 2019

JFB

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Plant nutrient management can influence the type and level of polyphenolic compounds within leafy vegetables. Therefore, we investigated the effects of fertilizer micro-dosing and harvest time on antioxidant activities of aqueous polyphenolic extracts from Amaranthus cruentus, Ocimum gratissimum and Solanum macrocarpon. Plants were cultivated using urea alone or combined with cattle manure for three staggered harvest periods. Polyphenolics profile (RP-HPLC), DPPH, hydroxyl and superoxide radical scavenging activities, ferric ion reducing power, ferrous ion chelation and inhibition of linoleic acid oxidation were determined. Polyphenolic contents of A. cruentus (caffeic acid, myricetin, quercetin and rutin) and O. gratissimum (catechin and gallic acid) as well as antioxidant activities of the vegetables extracts (except hydroxyl radical scavenging by A. cruentus) were fertilizer micro-dose and harvest timedependent. Thus, combination of both factors highlighted the screening of optimal farming conditions for these vegetables in order to get leaf extracts possessing higher polyphenolic contents and antioxidant activities.

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Section: Polyphenols Profile As Affected By Fertilizer Micro-dose Andsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Fertilizer micro-dosing and harvesting time of indigenous leafy vegetables affect in vitro antioxidant activities

Moussa¹,

Alashi²,

Sossa-Vihotogbe³

et al. 2019

JFB

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“…Nugroho, Rohman, Lukitaningsih, Rakhmawati, and Sudjadi () reported that curcumin in turmeric from Indonesia is in the range of 3.03%–7.31%. This variation of the content of active phytochemicals was caused by several factors such as environmental factors of each growing location (Kumar, Yadav, Yadav, & Yadav, ; Liu, Liu, Yin, & Zhao, ; Liu et al, ; Ncube, Finnie, & Van Staden, ; Rapinski, Liu, Saleem, Arnason, & Cuerrier, ; Stanković, Ćurčić, Zlatić, & Bojović, ), plant development stage (Omezzine, Daami‐Remadi, Ladhari, & Haouala, ), planting period (Brasileiro, Leite, Casali, Pizziolo, & Coelho, ), and harvesting period (Brasileiro et al, ; Watson, Wright, McBurney, Taylor, & Linforth, ).…”

Section: Resultsmentioning

confidence: 99%

Acceleration of turmeric drying using convection and microwave‐assisted drying technique: An optimization approach

Monton

Luprasong

Charoenchai

2019

J Food Process Preserv

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The aim of this study was to optimize the drying process of turmeric using convection drying followed by microwave drying to accelerate the drying time. Convection time (0-30 min) and microwave time (20-60 min) were the two investigation factors. The obtained dried turmeric was pulverized. Water, volatile oil, and curcuminoid contents were determined. Weight loss after drying was also investigated. Results showed that increasing the convection time and microwave time increased weight loss and decreased water content. Microwave time had a significant effect on water, volatile oil, and curcuminoid contents, while convection time did not. The highest content of volatile oil and curcuminoids, and the lowest content of water were found when microwave drying was carried out for approximately one hour without convection drying. In summary, the optimization of the drying process could accelerate the drying time and turmeric that met the standards of Thai Herbal Pharmacopoeia. Practical applicationsThe optimization data could be used as a guide for the selection of drying condition for turmeric raw materials to meet the standards of the Thai Herbal Pharmacopoeia.

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“…Plant secondary metabolites can suffer quantitative and qualitative variations influenced by biotic and abiotic factors. [37][38][39][40] Since in our study both batches of leaves (P1 and P2) were harvested in the spring season from the same plant specimen with an interval of one year, the factors that influenced the modification in the concentration of the phenolic substances in P1 and P2 leaf materials remain unclear. Both P1-E and P2-E extracts had their chemical composition investigated, but only P1-A fraction (11.3% yield, Figure S2, see Supplementary Information) and its main compounds were biomonitored for their antimalarial activity and cytotoxicity.…”

Section: 36mentioning

confidence: 99%

Leaves from the Tree Poincianella pluviosa as a Renewable Source of Antiplasmodial Compounds against Chloroquine-Resistant Plasmodium falciparum

Souza¹,

Nascimento²,

Borsodi³

et al. 2017

J. Braz. Chem. Soc.

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Poincianella pluviosa is a tree whose stem bark is reputed to have antidiarrheal, wound healing, antitumoral and antimalarial properties. Considering that the leaves of the tree are a more abundant and renewable source than the stem bark, we chose to study the antimalarial potential of this organ part. The aqueous leaf extract exhibited a rich phenolic profile. It was active (IC 50 = 6.88 ± 1.64 µg mL -1 ) against chloroquine resistant Plasmodium falciparum (W2) without toxicity to HepG2 A16 cells. The organic fraction was more active (IC 50 = 1.83 µg mL -1 ) than the aqueous leaf extract itself. Ten phenolic compounds were obtained from the latter. This is the first report on the phenolic composition of P. pluviosa leaves. Ellagic acid (IC 50 = 0.215 ± 0.007 µg mL -1 ) proved to be 32 fold more active than the aqueous leaf extract itself. Considering their renewable aspect, leaves of P. pluviosa appear to be a more interesting source of antimalarial compounds than stem bark.Keywords: Poincianella pluviosa var. peltophoroides, leaves, ellagic acid, malaria, Plasmodium falciparum (W2) IntroductionA reduction in the incidence of tropical diseases such as malaria in poor countries is considered a major goal of the international community.1,2 In 2013, malaria was reported to be a threat to 198 million people causing 584,000 deaths in the world, mostly children under 5 years old in Africa. The impact of this disease is a major risk with the growth of world's population, mainly in regions without access to health services. The lack of sufficient financial resources and public health capacities in poor endemic countries led to the use of inefficient medicines and/or protocols resulting in an increase of mortality rate and spread of parasite resistance. 2,3 Malaria is an infectious disease caused by protozoa of the genus Plasmodium, which is transmitted by female Anopheles sp. mosquitoes. Five species of Plasmodium are able to infect humans, Plasmodium falciparum being considered the most dangerous. 4 Some clinical manifestations such as fever, chills, mild anemia and diarrheas are associated with malaria. 3,5 According to World Health Organization (WHO)-established protocols, 2 the treatment of uncomplicated Plasmodium falciparum malaria involves artemisininbased combination therapy with drugs such as mefloquine, piperaquine or the sulfadoxine/pyrimethamine combination. Nowadays, antimalarial therapy in endemic regions is more difficult to manage since the parasite has become resistant to most antimalarial drugs. 3,6 The resistance to artemisinin emerged in regions where this drug was used in a monotherapy protocol. 2,7 This situation continuously stimulates the search for new antimalarial drugs, especially from natural sources. 1de Souza et al. 1319 Vol. 29, No. 6, 2018 Plants showing proven antimalarial activity still represent a promising source of new medicines. It is important to note that some antimalarial drugs such as artemisinin and quinine have plant origin. 1,6,8 Poincianella pluviosa (DC.) L. P. Queiroz ...

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<b>The influence of planting and harvesting times on the total phenolic content and antioxidant activity of <i>Talinum triangulare</i> (Jacq.) Willd

Cited by 23 publications

References 34 publications

Fertilizer micro-dosing and harvesting time of indigenous leafy vegetables affect in vitro antioxidant activities

Fertilizer micro-dosing and harvesting time of indigenous leafy vegetables affect in vitro antioxidant activities

Acceleration of turmeric drying using convection and microwave‐assisted drying technique: An optimization approach

Leaves from the Tree Poincianella pluviosa as a Renewable Source of Antiplasmodial Compounds against Chloroquine-Resistant Plasmodium falciparum

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