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Nutritional and anti nutritional constituents of Plectranthus rotundifolius

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Abstract

There are so many crops are lost in cultivation due to urban civilization, improper rainfall and non use of fertile lands. One among the lost crop is Plectranthus rotundifolius which is commonly called as coleus potato. This plant is cultivated in south Tamilnadu especially in the month of January to May. This plant is cultivated in dry black soil with little amount of irrigation facility. The tuber can be used as an edible food in the form of baking and frying. Coleus potatoes are rich source of reducing sugar, protein, crude fat and crude fiber. There are so many secondary metabolites are present in these tuber which shows therapeutic and pharmaceutical application.

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... These varieties are mainly grown by small holder farmers for domestic consumption and contribute to food security in a large part of the country. The tubers contain significant rate of carbohydrates, proteins, fibers, vitamins and antioxidants [4,5] and are commonly consumed as a curry, baked, fried, or cooked [6]. The tubers are recognized to be one of the best tasted tubers. ...
... The high prices variation represents an economic opportunity for many actors (farmers and traders) [1,7]. Some researches already underlined the nutritional potential of frafra potato and its contribution to food security [5,9]. These results suggested that frafra potato could be promoted as a tuber for food and a source of income. ...
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Frafra potato (Solenostemon rotundifolius) is a herbaceous specie of the family of Lamiaceae. It is cultivated in the tropical regions of Asia and Africa, mainly by the small holder farmers, as a subsistence tuber crop. It is one of the neglected species with potential for commercialization. In Burkina Faso, Ouagadougou is known to be an important city of consumption of frafra potato. Previous research activities have revealed that profits made from marketing of frafra potato is decreasing compared to that of other tuber crops (yams, sweet potato). The objective of this study was to identify the marketing potentialities and constraints for frafra potato. Ten traders of frafra potato's tubers of three main markets in Ouagadougou were interviewed in 2015. They recognized the increasing demand for frafra potato tubers and its high economical potential. The frafra potato variety with black skin color were identified to be the preferred variety. However, the rapid tuber deterioration and the lack of efficient methods of storage, the small size of tuber and the short period of tubers availability on the markets were identified to be the main constraints of frafra potato marketing. These constraints should be addressed by future research programs.
... Its products have been cited for use in treating burns, wounds, sores, insect bites and allergies [21]. Other uses include treatment for stomach pain, nausea, vomiting, diarrhoea, mouth and throat infections and are used as purgative, carminatives and as antihelmintic [6], [9], [10], [28]. Black potato is also noted for its antioxidant content which has been studied for its potential to mediate cancer cells [14], [15]. ...
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Plectranthus rotundifolius (synonym: Solenostemon rotundifolius) (black potato) is an underutilised nutrient-rich crop that has the potential to contribute to food and nutritional security. We examined the macronutrient and selected mineral content of black potato bought at a morning market located in the state of Pahang, Peninsular Malaysia. The proximate composition of the tubers observed in % were, moisture (78.14 ± 0.84); crude protein (0.84 ± 0.06); crude fat (0.48 ± 0.06); crude fibre (2.03 ± 0.12); ash (1.63 ± 0.13); carbohydrate (18.92 ± 0.73) and energy in kcal/100g (83.32 ± 3.46). The mineral content observed in mg/kg were calcium (336.57 ± 21.71), iron (48.20 ± 3.64), potassium (12025.07 ± 485.33), magnesium (1346.63 ± 101.24), sodium (68.23 ± 2.62), manganese (6.67 ± 0.21) and phosphorus (978.00 ± 7.72). Comparison of black potato with some popular tubers such as potato, sweet potato and cassava found that black potato had less crude protein and crude fat. The carbohydrate and the energy contents of black potato were within the same range as potato and sweet potato but lower than those observed in cassava. The ash content of black potato was higher than that of potato, sweet potato and cassava and it also had a higher mineral content. Compared with popular tuber crops such as potato, sweet potato and cassava, black potato was observed to have higher mineral content that fulfils the requirements of the Recommended Nutrient Intake as outlined in the Dietary Guideline for American male and female aged between 31 to 50.
... S. rotundifolius belongs to the Lamiaceae (Labiatae) family, a group of aromatic flowering plants with about 236 genera and 6900-7200 species [5] many of which are cultivated for their medicinal, ornamental and culinary properties. S. rotundifolius is commonly called Hausa potato in Nigeria [6][7][8]. Leaves, flowers, seeds, stem and roots of some plants from Lamiacea family have potentials to be analgesic, antipyretic, anti-fungal, anti-spasmodic, anti-oxidant, anti-microbial, anti-diabetic, anti-asthmatic, anti-diarrhoeal and antiseptic agents [5]. In addition, boiled leaves of S. rotundifolius are also used in ethnomedicine for the treatment of dysentery while results of earlier investigations suggest that the crude extract of S. rotundifolius may possess anti-diarrheal activity [6,9]. ...
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In this study, the spasmolytic effects of Solenostemon rotundifolius leaf extract and its fractions on normal and acetylcholine induced rhythmic contractions of an isolated rabbit jejunum were investigated against the background of the traditional use of the plant’s extract in diarrheal treatment. Crude extract was prepared from the plant’s leaves and 7 fractions were obtained following fractionation of this crude extract. About 2-3 cm length of jejunum isolated from a stunned rabbit was suspended vertically in a 30 ml organ bath containing tyrode solution and bubbled with air. After equilibration, various doses of the extract, fractions and atropine were separately administered to the piece of tissue to determine their effects. Effects of graded doses of acetylcholine on the piece of tissue were also determined and repeated separately in the presence of atropine and the test extract and fractions with adequate washing preceding each administration.Results obtained showed that the effect of the crude extract on the piece of isolated tissue was inhibitory as graded doses like atropine, produced a dose dependent relaxation of the tissue, lowering the amplitude of contractions in each case with 0.33 mg/ml producing 71.42 percent inhibitory effect and 1.00 mg/ml producing an inhibitory activity of 91.67 percent. The effects of all the fractions were also inhibitory but fraction 5 produced the highest relaxation effect. Acetylcholine when applied caused dose dependent contractions which were significantly inhibited by the crude extract and fractions in a manner which compared favourably with that of atropine. The order of strengths of inhibitions of the test agents on acetylcholine induced contractions is: F5>F4>F3>CRUDE>F6>F1>F2>F7. We therefore conclude thatSolenostemon rotundifolius leaf extract and fractions, having shown significant spasmolytic effects on an isolated piece of jejunum, may contain active components withanti-diarrheal potentials and be of value in the management of the disease.
... Les échantillons analysés ont été caractérisés par la présence de sucres réducteurs, de mucilages, de coumarines, d'alcaloïdes, de tanins, de flavonoïdes mais pauvres en saponosides et anthocyanes. Nos résultats sont légèrement différents de ceux des auteurs antérieurs [9,10] qui ont travaillé sur les tubercules de la même plante. La richesse en polyphénols pourrait expliquer les vertus ou les raisons de la consommation ces tubercules comme remède contre l'hypertrophie de la prostate. ...
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RESUME Introduction : La situation nutritionnelle dans la plus part des pays sahéliens est caractérisée par des niveaux élevés de malnutrition proteino-énergétique. Pour remédier à ces insuffisances, les populations rurales font recours aux produits de cueillette dont la disponibilité reste saisonnière. Plectranthus rotundifolius est une plante annuelle négligée des régions sud du Mali beaucoup consommée pendant sa période de disponibilité, mais avec peu de données sur ses valeurs alimentaires et médicinales. Objectifs : Le but de ce travail était de valoriser Plectranthus rotundifolius par la caractérisation de certains groupes chimiques et la détermination de la valeur nutritionnelle à travers le dosage des teneurs en glucides, en protéines et en éléments minéraux des tubercules. Méthodes : Le matériel végétal était constitué des tubercules cuits. Les réactions en tubes ont permis de caractériser les groupes chimiques, les cendres par la méthode pondérale, les protéines par celle de Biuret, les glucides par la méthode Bertrand et les éléments minéraux par absorption atomique. Résultats : L'analyse phytochimique a révélé la présence des sucres réducteurs, mucilages, alcaloïdes et polyphénols. Par ailleurs les échantillons analysés contiennent plus de 70% de glucides, 2% de protéines ; 1,9% de cendres ; 1,582mg de Fe; 0,744mg de Na et 0, 934mg de Mg dans 100g. Conclusion : Ces données soutiennent l'utilisation alimentaire de Plectrancthus roduntifolius. Cependant des investigations supplémentaires sont nécessaires pour vérifier les propriétés médicinales de cette espèce. ABSTRACT Introduction: The nutritional situation in most Sahelian countries is characterized by high levels of protein-energy malnutrition. To remedy these shortcomings, rural populations resort to harvesting products whose availability remains seasonal. Plectranthus rotundifolius is an annual neglected plant of southern Mali much consumed during its availability period, with little data on its dietary and medicinal values. Objectives: This study aimed to valorize Plectranthus rotundifolius by characterizing the chemical groups and by determining the nutritional values of Plectranthus rotondifolius tubers through the quantification in carbohydrates, proteins and mineral elements. Methods: The plant material consisted of tubers. Chemical groups were detected using tube reactions; ashes were quantified in weight, proteins and carbohydrates were determined by Biuret method and Bertrand's one respectively wile mineral elements by atomic absorption. Results: Phytochemical analysis revealed the presence of reducing sugars, mucilages, alkaloids and polyphenols. On other hand, samples contain more than 70% carbohydrates, 2% proteins, 1.582mg Fe; 0.744 mg of Na and 0.934 mg of Mg in 100 g. Conclusion: These data support the dietary use of Plectranthus rotundifolius. However, furthermore investigations are needed to verify the medicinal properties of this species.
... It produces edible, ovoid tubers up to 8 cm in length. The raw tubers are exceptionally nutritious, and 100 g of tissue contains 394 KJ (94 Kcal) of energy, 1.8 g protein, 0.2 g fat, 21.9 g carbohydrate, 17 mg calcium, 1.1 g fiber, and 6.0 mg iron (Anbuselvi, 2013). The tubers of Frafra potatoes are fermented to make alcoholic beverages (Opoku-Agyeman et al., 2007) or milled for flour, among other uses. ...
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Frafra potato (Solenostemon rotundifolius) is an important food crop indigenous to Western Africa and a member of the Labiaceae (mint) family. It is nutrient-rich and drought tolerant; however, despite its potential as a food security crop, it has not received the research support needed to promote its widespread adoption and safeguard its diversity. As a result, Frafra potato is becoming extinct and restricted to indigenous communities where it holds traditional importance. It is imperative that conservation methods are explored, but before then, the genetic diversity of the species should be assessed. The objectives of this study were to develop simple sequence repeats (SSRs) for Frafra potato from de novo sequencing of the genome, and to provide a preliminary assessment of genetic diversity of Frafra potato in Ghana. To this end, 57 accessions of Frafra potato obtained from three geographic regions of Ghana were characterized using 15 discovered microsatellites. Forty-six multilocus genotypes (MLGs) were identified among the 57 accessions. The genetic diversity among the MLGs was moderate-to-high. Preliminary evaluation of accessions from the three collection zones indicated the presence of population structure among Frafra potato individuals collected in Ghana, Africa.
... The potential yield reported in West Africa ranged from 7 to 20 T/ha (Enyiukwu et al., 2014). The tubers contain significant rate of reducing sugar (26 mg/100g), protein (13.6 to 14.6 mg/100g), crude fat (1.2%), crude fiber (1.6%), phosphorus (36 mg/100g), calcium (29 mg/100g), vitamins A and C, respectively 13.6 mg/100g and 10.3 mg/100g, and antioxidants (Anbuselvi and Balamurugan, 2013;Anbuselvi and Priya, 2013). They are commonly consumed as a curry, baked or fried, or cooked (Agyeno et al., 2014). ...
... Petani jarang sekali menanam tanaman kentang hitam pada musim kemarau, karena rendahnya tingkat ketersediaan air tanah. Walaupun Priya dan Abuselvi [4] menyatakan bahwa tanaman kentang hitam cukup toleran terhadap kekeringan, namun demikian sejauh ini belum ada informasi yang menyebutkan tentang tingkat kebutuhan air pada tanaman kentang hitam, karena sebagian besar penelitian hanya difokuskan pada perbanyakan bahan tanam dan varietas melalui pemuliaan tanaman 5,6,1 . Padahal kelangsungan hidup tanaman tidak hanya ditentukan oleh bahan tanam saja, tetapi air juga merupakan senyawa yang sangat penting. ...
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Pour remédier à la malnutrition protéino-énergétique, les populations rurales font recours à certaines plantes alimentaires (légumes feuilles) utilisées comme condiment dans la préparation des sauces afin d'équilibrer leur alimentation. Cependant, les vertus nutritionnelles et la composition chimique de ces produits locaux ne sont pas bien connues. Ainsi, le but de ce travail était de déterminer les valeurs nutritives et la composition phytochimique des feuilles ou rameaux feuillés de quinze plantes utilisées dans la préparation des sauces au Mali. Un screening phytochimique a été réalisé et les teneurs en protéines, lipides, éléments minéraux et énergie brute ont été déterminées. Les résultats ont montré que ces légumes feuilles sont assez riches en nutriments et métabolites secondaires. Les feuilles de Corchorus tridens étaient les plus riches en énergie avec 4143 Kcal/100g suivies de celles de Arachys hypogaea avec 3469 Kcal/100g. Les plus grandes teneurs en calcium (1,8 mg/g) et en potassium (1,9 mg/g) ont été enregistrées au niveau des feuilles de Solanum aethiopicum. Les feuilles de Portulaca oleracea ont montré la teneur la plus élevée en matières grasses (5,8 %) et celles de Brassica napus, les plus riches en protéines (20,4 %). De nombreux métabolites secondaires tels que les alcaloïdes, les flavonoïdes, les polyphénols et saponosides ont été mis en évidence dans tous les échantillons. Ces résultats pourraient justifier l'utilisation culinaire de ces plantes alimentaires et montrent à suffisance qu'elles constituent de sources potentielles de nutriments indispensables à l'équilibre alimentaire et sanitaire.
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The fight against malnutrition has become one of the major concerns of many countries today. The most exposed are infants, older subjects and pregnant women. In sub-Saharan Africa, and particularly in Mali, studies have shown that wild food plants could help to combat effectively the malnutrition. The goal of this work was to contribute to the valorization of these picking products through a biochemical assessment of five wild food plants used during the welding period in southern of Mali. The plant material consisted of the fruits of C. myxa, C. pinnata, D. microcarpum and S. birrea and tubers R. splendens. The reactions in the tube was used to characterize the chemical groups. The monosaccharides were assayed by gas chromatography (GC) and total proteins by the Kjeldhal method. Total lipids were extracted by using soxhlet and quantified by the gravimetric method. The mineral elements were quantified by Atomic Absorption Spectrophotometry. The raw energy was evaluated by the calorimetric method of total combustion. The results showed that the wild food plants studied are rich in secondary and primary metabolites, in mineral and energetic elements. The maximum protein, carbohydrate and total lipid levels were obtained respectively in Raphionachme splendens (11.29%), Sclerocarya birrea (87.20%) and Detarium microcarpum (1.32%). GPC revealed relatively high levels of simple sugars, especially glucose (74.76% in S. birrea), which is the most commonly used sugar. The richness of these plants in nutrients, secondary metabolites and minerals could contribute to the fight against malnutrition.
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Eight principal bioactive compounds were investigated in the dry leaf water and ethanolic extracts of Cnidoscolus aconitifolius. In all, three active components were positive for both extracts. These include phenols, saponins and cardiac glycosides. Phlobatannin was detected in the water extract while alkaloids occurred in the ethanolic extract. Flavonoids, anthraquinones and combined anthraquinones were absent in both extracts. The antimicrobial activity of the plant was carried out on Salmonella typhi and Staphylococcus aureus using ethanolic. S. typhi showed some sensitivity to the ethanolic extract (1.5 +/- 0.5 mm) unlike the dry and fresh water extracts but much more sensitive (P<0.05) to chloramphenicol (17 +/- 0.1 mm). However, fresh leaf water extract, dry leaf ethanolic extract and chloramphenicol showed 2.0 +/- 0.5, 3.0 +/- 0.1 and 11.5 +/- 0.1 mm bioactivity respectively against S. aureus. There was no indication of antimicrobial activity in the dry leaf water extract for both bacteria strains.
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From ethanolic, water extracts and their fractions of mature fruits of wild black-berry Aristotelia chilensis (Mol) Stuntz (Elaeocarpaceae), different phenolic compounds were identified by chromatographic (HPLC) and unequivocally assignments by spectroscopic (UV, NMR) data analysis. Anthocyanidins, flavonoids and phenolic acids fractions were obtained using flash and open column chromatography. The main compounds gentisic acid, ferulic acid, gallic acid, p-coumaric acid, sinapic acid, 4-hydroxybenzoic acid, delphinidin, cyanidin, vanillic acid, delphinidin gallate, gallocatechin gallate, quercetin, rutin, myricetin, catechin and epi-catechin as mixture 1:1, and several glycosides of anthocyanidins (delphinidin-3-sambubioside-5-glucoside, delphinidin-3,5-diglucoside, cyanidin-3-sambubioside-5-glucoside, cyanidin-3,5-diglucoside, delphinidin-3-sambubioside, delphinidin-3-glucoside, cyanidin-3-sambubioside, and cyanidin-3-glucoside), and proanthocyanidin B were detected. In addition to phytochemical analysis the antioxidant activities of extracts, partitions and fractions were strongly correlated with the highest polyphenol contents. The most active samples were the ethanolic and acetone extracts in all bioassays used and all samples were compared for activity against butylated hydroxy toluene (BHT), quercetin and tocopherol used as pattern samples. The juice (E), EtOH extract (A) and acetone partition (B) were found to have IC50 values of 4.7, 1.7 and 7.4 ppm, respectively against DPPH and 5.9, 2.1 and 3.9 ppm, respectively against TBARS formation. Additionally, the fraction F-4 showed a strong activity with IC50 of 4.9 and 6.5 ppm, against DPPH and TBARS respectively. Consistent with this finding, EtOH extract had the greatest ORAC and FRAP values as percentage of activity. On the other hand the IC50 values for the inhibitory activity against of extract B, F-3 and F-4 were 9.7, 13.2 and 10.7 ppm, respectively and against OH− were 29.1, 7.0 and 6.3 ppm, respectively. The EtOH extract protects against stress oxidative reducing the concentration of the MDA a lipid peroxidation index. These results shows that this fruit could be useful as antioxidant and nutraceutical sources.