Phenolic compounds are one of the main groups of secondary metabolites in plants and are known for their antioxidant activity. Rosmarinus officinalis L. (rosemary) contains different phenolic compounds including carnosol, carnosic acid and rosmarinic acid. In Cuba, rosemary cultivation is limited because it is difficult to propagate and has a low yield. As a result, it was removed from the Herbal Medicine National Formulary. However, the National Public Health System has a strong interest in rosemary because of its value as a natural antioxidant medicine. Irrigation with water treated with a static magnetic field (SMF) is a possible strategy to increase rosemary yield. This technology has been applied to accelerate plant growth and increase crop quality. The aim of this study was to evaluate the content of phenolic compounds and antioxidant activity in aqueous leaf extracts from plants irrigated with SMF-treated water in comparison to control plants. Significant differences in phenolic content and antioxidant activity were observed between aqueous extracts of control plants and plants irrigated with SMF-treated water. Therefore, irrigation with SMFtreated water is a promising technology to improve the cultivation of rosemary as a raw material to obtain pharmaceutical products with high antioxidant activities.
The aclimatization of plants of Ananas comosus MERR var. MD-2 is stimulated with irrigation with magnetically treated water A aclimatização de plântulas de Ananas comosus MERR var. MD-2 é estimulada com a irrigação com água tratada magneticamente
Antioxidant effects of tomatoes (Solanum lycopersicum L.) have been studied and an association between dietary intake of tomatoes and lowered risk of cancer, neurodegenerative, and cardiovascular diseases has been suggested. Here we used magnetically treated water (MTW; 0.03-0.15 T), which promotes better germination and productivity in tomatoes, and we investigated the effects of aqueous and ethanolic (10-400 μg/ml) extracts of S. lycopersicum as potential antioxidant against 10 μM Fe(II)-induced thiobarbituric acid reactive species (TBARS) in liver and brain homogenates from rats. The ethanolic extracts from magnetically treated plants were more effective than aqueous extracts in preventing TBARS formation in brain and liver. The protective effects of ethanolic extract can be associated with antioxidants (polyphenols and flavonoids), lycopene and other lipophilic components found in the extract. In effect, magnetically treated plants had higher content of polyphenolic and flavonoid compounds than nontreated plants and they can be a better source of antioxidants than nontreated plants. Consequently, MTW can be used to produce functional foods with high contents of antioxidant components and may have better beneficial health effects than traditionally produced foods.
Este trabajo tuvo como objetivo evaluar la influencia del agua tratada bajo una inducción magnética constante de 0,12 T en la recuperación de las plántulas de Adenanthera pavonina, después de ser damnificadas por un huracán. El cultivo se realizó en invernadero, con sustrato compuesto por materia orgánica y arena (1:1); la desinfección y escarificación química de las semillas se efectuó con ácido sulfúrico (98 %) y ácido bórico (5 %). Se evaluaron la longitud, el diámetro del tallo y el número de hojas por un período de 12 semanas. La aplicación del agua de riego tratada magnéticamente produjo un aumento estadísticamente significativo, en la longitud y el diámetro del tallo, no siendo así para la emisión de las hojas en esta fase de desarrollo. Los resultados confirmaron que el agua de riego, con tratamiento magnético de 0,12 T, puede ser empleada como estimulante del crecimiento en esta especie forestal y en la recuperación de plantas dañadas por cambios climáticos.
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