scholarly journals Effect of nitrogen, phosphate and potassium fertilization on dystrophic soil on the content of secondary metabolites in Hydrocotyle umbellata L. var. bonariensis (Lam.) Spreng

2021 ◽  
Vol 10 (15) ◽  
pp. e504101523167
Author(s):  
André Luiz Ribas de Oliveira ◽  
Matheus Gabriel de Oliveira ◽  
José Realino de Paula ◽  
João Carlos Mohn Nogueira ◽  
Vandervilson Alves Carneiro ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Secondary Metabolites ◽  
Controlled Environment ◽  
Total Phenols ◽  
Zero Level ◽  
Potassium Fertilization ◽  
Medium Level ◽  
Phosphorus And Potassium ◽  
Red Latosol ◽  
Harmful Effects

The knowledge of medicinal plants is of great importance for popular health. On the other hand, the levels of secondary metabolites in medicinal plants is an important parameter to be evaluated. The study of the nutrition of plants and the production of metabolites can provide the identification of beneficial factors and also find out if there are harmful effects of this fertilization/nutrition. In this study, three experiments were carried out (nitrogen, phosphate and potassium fertilization) in the culture of Hydrocotyle umbellata L. var. bonariensis (Lam.) Spreng on dystrophic Red Latosol on metabolite production (total phenols, total flavonoids and hibalactone content). It was used the soil of a rural property in the municipality of Anápolis – Goiás (Brazil). The experimental design was completely randomized, in a controlled environment. The experiment involved the following dosages of fertilization: nitrogen (0; 30; 45; 60 e 75 kg of N.ha-1); phosphate (0; 120; 150; 180 e 210 kg of P2O5.ha-1) and potassium (0; 25; 50; 75 e 100 kg of K2O.ha-1). The maximum contents of total phenols were with the medium level of nitrogen, zero level of phosphorous and highest level of potassium. For the total flavonoid, the maximum contents were obtained with the medium levels of nitrogen and potassium and zero level of phosphorus. Finally, the hibalactone content was favored by highest level of nitrogen and zero levels of phosphorus and potassium.

scholarly journals Temporal heterogeneity in primary and secondary metabolic products of medicinal plants of Sitamata Wildlife Sanctuary in Rajasthan, India

2020 ◽  
Vol 49 (3) ◽  
pp. 473-479
Author(s):  
Arti Soni ◽  
Pawan Kumar Kasera
Keyword(s):  
Medicinal Plants ◽  
Secondary Metabolites ◽  
Crude Protein ◽  
Temporal Heterogeneity ◽  
Total Phenols ◽  
Monthly Variation ◽  
Wildlife Sanctuary ◽  
Primary And Secondary Metabolites ◽  
Total Alkaloids ◽  
Metabolic Products

Phyto-chemical investigation in three tuberous medicinal plants, viz., Arisaema tortuosum (Wall.) Schott, Chlorophytum tuberosum (Roxb.) Baker and Curculigo orchioides Gaertn., growing in Sitamata Wildlife Sanctuary of Rajasthan were conducted for both primary and secondary metabolites. Experiment was carried out during June to October to find out monthly variation in accumulation of both primary (total contents of sugars, crude protein and phosphorus) and secondary metabolites (total contents of alkaloids and phenols) in tubers of these three species. In A. tortuosum (Wall.) Schott, crude protein and total alkaloids were found maximum during September, whereas phosphorus and total phenols during July. In C. tuberosum (Roxb.) Baker and C. orchioides Gaertn. maximum values of crude protein, phosphorus and total alkaloids were found during July. It is, therefore, concluded that the maximum production of different metabolites were found to be in the month of July and it is the suitable month for harvesting tubers.

scholarly journals Pharmacology and Phytochemistry of Ecuadorian Medicinal Plants: An Update and Perspectives

2021 ◽  
Vol 14 (11) ◽  
pp. 1145
Author(s):  
Chabaco Armijos ◽  
Jorge Ramírez ◽  
Melissa Salinas ◽  
Giovanni Vidari ◽  
Alírica I. Suárez
Keyword(s):  
Chemical Composition ◽  
Medicinal Plants ◽  
Secondary Metabolites ◽  
Essential Oils ◽  
Volatile Compounds ◽  
Biological Activities ◽  
Indigenous Communities ◽  
Therapeutic Agents ◽  
Practical Applications ◽  
Pharmacological Studies

The use of plants as therapeutic agents is part of the traditional medicine that is practiced by many indigenous communities in Ecuador. The aim of this study was to update a review published in 2016 by including the studies that were carried out in the period 2016–July 2021 on about 120 Ecuadorian medicinal plants. Relevant data on raw extracts and isolated secondary metabolites were retrieved from different databases, resulting in 104 references. They included phytochemical and pharmacological studies on several non-volatile compounds, as well as the chemical composition of essential oils (EOs). The tested biological activities are also reported. The potential of Ecuadorian plants as sources of products for practical applications in different fields, as well the perspectives of future investigations, are discussed in the last part of the review.

scholarly journals SEASONAL VARIATION OF PHENOLS AND FLAVONOIDS IN NON-GALLED AND GALLED LEAVES OF CARYOCAR BRASILIENSE (CARYOCARACEAE)

2021 ◽  
Vol 18 (38) ◽  
pp. 38-46
Author(s):  
Edson Cardoso TEIXEIRA ◽  
Rafaela Oliveira FERREIRA
Keyword(s):  
Secondary Metabolites ◽  
Abiotic Factors ◽  
Complexation Reaction ◽  
Strong Positive Correlation ◽  
Total Phenols ◽  
Leaf Extracts ◽  
Strong Negative Correlation ◽  
Caryocar Brasiliense ◽  
Maximum Temperatures ◽  
Galling Insects

Introduction: Galling insects manipulate the development of their host plants. Galls are rich in secondary metabolites, such as phenolic compounds and terpenes. Caryocar brasiliense acts as a host of galling insects. Few studies report the impacts of this plant-insect interaction on the species' morphology, physiology, and secondary metabolism. Objective: The purpose of this study was to verify if there is a correlation between the levels of total phenols and flavonoids in C. brasiliense leaf extracts and environmental variables, such as temperature and precipitation, throughout the year, and to evaluate how galling insects can interfere in this seasonality. Methods: Ethanol extracts from leaves were obtained by soxhlet extraction. The main classes of secondary metabolites were detected by phytochemical prospecting. The levels of total phenols and flavonoids were quantified by the Folin-Dennis tests and complexation reaction with aluminum chloride, respectively. Pearson 's correlation coefficient shows that the levels of phenols and flavonoids were correlated with the average monthly maximum temperatures and precipitation accumulation, respectively, recorded in Gurupi - Tocantins. Results and Discussion: Phytochemical prospecting indicated flavonoids, saponins, tannins, triterpenes, steroids, and alkaloids in both extracts. In C. brasiliense, the samples of healthy leaves suffered a greater variation in the levels of phenols (68.39±2.3 to 279.34±3.1 mg GAE g-1 extract) and flavonoids (164.06± 3.0 at 269.03±3.6 mg QE g-1 extract) compared to leaf samples with galls. A strong positive correlation was found between the contents of total phenols and maximum temperatures and a strong negative correlation with precipitation through Pearson's correlation. Conclusions: The variations observed in the levels of phenols and flavonoids in the extracts of C. brasiliense seem to be related to abiotic factors and the herbivory promoted by the galling insect.

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