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| Oliveira,Vanessa M. de; Forni-Martins,Eliana R.; Magalhães,Pedro M.; Alves,Marcos N.. |
| In this study, we examined the chromosome number and some morphological features of strains of Stevia rebaudiana. The chromosomes were analyzed during mitosis and diakinesis, and the tetrad normality and pollen viability were also assessed. In addition, stomata and pollen were measured and some plant features were studied morphometrically. All of the strains had 2n = 22, except for two, which had 2n = 33 and 2n = 44. Pairing at diakinesis was n = 11II for all of the diploid strains, whereas the triploid and tetraploid strains had n = 11III and n = 11IV, respectively. Triploid and tetraploid plants had a lower tetrad normality rate than the diploids. All of the strains had inviable pollen. Thus, the higher the ploidy number, the greater the size of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Asteraceae; Pollen; Polyploidy; Stevia rebaudiana; Stevioside; Stomata. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200015 |
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| GOMES,ERIK N.; MOTERLE,DIEGO; BIASI,LUIZ ANTONIO; KOEHLER,HENRIQUE S.; KANIS,LUIZ ALBERTO; DESCHAMPS,CÍCERO. |
| Abstract Stevia (stevia rebaudiana Bertoni) is a species characterized by producing non-caloric substances with high sweetening potential. Among these substances, rebaudioside A and stevioside are produced in greater quantity. Plant density and harvesting time are factors that affects biomass and sweetening compounds yield in this species. The objective of this research was to evaluate the effect of plant densities and harvesting times on the productive and physiological characteristics of stevia in southern Brazil. The experimental design was in randomized blocks, in a split-plot scheme, with 9 treatments comparing the effect of three planting densities (166 667, 83 333 and 33 333 plants ha-1) in the plots and three harvesting periods (before, in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diterpene glycosides; Natural sweetener; Rebaudioside A; Stevioside. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703249 |
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| Silva,Gisleine Elisa Cavalcante da; Assef,Abdol Hakin; Albino,Claudio Cordeiro; Ferri,Letícia de Araujo Funari; Tasin,Gilson; Takahashi,Mirian Hideko; Eik Filho,Wilson; Bazotte,Roberto Barbosa. |
| The tolerability of stevioside (2.75 mg/kg/day) obtained from leaves of Stevia rebaudiana (Bert) Bertoni (Compositae) was investigated in hyperlipidemic patients. For this purpose a placebo controlled double blind study was performed. The patients were randomized in two groups: the first group received capsules containing placebo and the second group received capsules containing stevioside (50 mg) during 90 days. All capsules were ingested twice daily, i.e., 2 capsules before lunch and 2 capsules before dinner. After the selection of the patients and each 30 days body mass index and laboratory tests (alanine aminotransferase, aspartate aminotransferase, gamma-glutamyltransferase, total cholesterol, high density lipoprotein, low density lipoprotein, very... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stevia rebaudiana (Bert) Bertoni; Stevioside; Clinical investigation; Placebo effect. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000500007 |
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| Milagre,H.M.S.; Martins,L.R.; Takahashi,J.A.. |
| A comparative study on the potential of some biological agents to perform the hydrolysis of stevioside was carried out, aiming at establishing an alternative methodology to achieve the aglycon steviol or its rearranged derivative isosteviol, in high yields to be used in the preparation of novel bioactive compounds. Hydrolysis reactions were performed by using filamentous fungi (Aspergillus niger, Rhizopus stolonifer and Rhizopus arrhizus), a yeast (Saccharomyces cerevisiae)andenzymes (pancreatin and lipases PL250 and VFL 8000). Pancreatin showed the best hydrolytic activity, furnishing isosteviol at 93.9% of yield, at pH 4.0, using toluene as a co-solvent. Steviol was produced using both pancreatin at pH 7.0 (20.2% yield) and A. niger at pH 7 (20.8% yield). |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stevioside; Hydrolysis; Aspergillus niger; Lipase; Pancreatin. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000200029 |
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