Influence of light intensity, fertilizing and season on the cirsiliol content, a chemical marker of Leonotis nepetifolia (Lamiaceae)
| Autor: | R. F. Santos, Ana Paula de Oliveira, Jackson Roberto Guedes da Silva Almeida, Pedro José Rolim-Neto, Raimundo Gonçalves de Oliveira-Júnior, Alan Diego da Conceição Santos, Emanuella Chiara Valença Pereira, Larissa Araújo Rolim, Ivanildo Viana Borges, Thiala Alves Feitosa, Lucas Gustavo Ferreira Cordeiro Viana, Luciano Augusto de Araújo Ribeiro |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Cirsiliol lcsh:Medicine Plant Science Ecosystem Science 01 natural sciences General Biochemistry Genetics and Molecular Biology Caatinga 03 medical and health sciences chemistry.chemical_compound Nutrient Gallic acid Agricultural Science 030304 developmental biology Flavonoids Abiotic component photoperiodism 0303 health sciences Lamiaceae biology General Neuroscience lcsh:R fungi food and beverages General Medicine Leonotis nepetifolia biology.organism_classification Horticulture Light intensity chemistry Shading General Agricultural and Biological Sciences 010606 plant biology & botany |
| Zdroj: | PeerJ PeerJ, Vol 7, p e6187 (2019) |
| ISSN: | 2167-8359 |
| DOI: | 10.7717/peerj.6187 |
| Popis: | Background Leonotis nepetifolia (Family Lamiaceae) is a medicinal plant from which the flavonoid cirsiliol with sedative, hypnotic, anti-inflammatory and cytotoxic activity has been extracted. Methods Seedlings were cultivated under different levels of shade in native or fertilized modes. The content of cirsiliol was measured monthly by high-performance liquid chromatography and the total phenolic content by the Folin-Ciocalteu method. Monitoring of growth was carried out with the weekly measurement of height until the stabilization of growth. Results The application of fertilizing and/or shading does not alter significantly the cirsiliol content. However, this content varies throughout the year, reaching the peak production in the summer, independently of the treatment applied. This same profile, with production in the summer, was also verified for phenolic compounds, reaching 58.15 ± 9.35 mg of equivalents of gallic acid per g of extract in the summer, content 1.84 times greater than the content verified in winter (31.56 ± 4.09 mg of gallic acid/g of extract). Although shading and fertilizing had no effect on cirsiliol content, the results also showed a positive influence on the height and biomass of the plant, which can causes a higher yield of extractable material. Discussion Biotic and abiotic stresses are able to increase or decrease the production of secondary metabolites, including phenolic compounds in medicinal plants and, as the stress response is peculiar to each species, cultivation studies become necessary. The present study reports by the first time the influence of shading, fertilizing and seasons in cirsiliol content in L. nepetifolia. Among analyzed variables, the seasons showed a larger influence in expression of cirsiliol and among seasons, our results showed that the summer is the ideal season for collections. In summer, the photoperiod is larger than in other seasons of the year and due to that, the plants need greater protection against the long photoperiod. For this, the plants increase the production of phenolic compounds as observed in this study. Although they do not influence the production of cirsiliol, the shading and nutrients in soil favor growth and leaf area of several plants, explaining, thus, the higher height and biomass obtained. |
| Databáze: | OpenAIRE |
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