Abstract
Rose petals have been applied as food additives in teas, cakes and flavor extracts. The aim of this research study was to explore and reveal the antioxidant potential of aqueous extracts of rose petals belonging to nine genotypes of rose (wild as well as hybrid). The in vitro antioxidant activities of roses were studied by lipid peroxidation assay, DPPH radical scavenging assay, iron chelation assay, phosphomolybdenum reduction assay and total phenolic and flavonoid contents. The aqueous extract showed inhibition against lipid peroxidation (TBARS), induced by prooxidants (10 µM FeSO 4 ) in mice liver homogenate. The free radical scavenging activities of the extracts were determined by scavenging of the DPPH radical. Extracts also showed metal chelating activities and high antioxidant activity in the phosphomolybdenum assay. The high content of phenolics and flavonoids detected in aqueous extracts may be responsible for the antioxidant activity. Amongst the different rose genotypes, screened, Rosa moschata (musk rose) was found to carry slightly higher antioxidant potential, owing to its higher phytochemical content.
Highlights
Reactive oxygen species (ROS) are spontaneously generated in cells during metabolism and are implicated in the aeitology of different diseases, such as heart diseases, stroke, rheumatoid arthritis, diabetes and cancer (Halliwell, Gutteridge, & Cross, 1992)
Certain genotypes like R. moschata, R. hybrida, R. hybrida showed a higher percentage of thiobarbituric acid-reactive substances (TBARS) reduction compared to the control
There is a strong correlation between thiobarbituric acid-reactive substances (TBARS) as a marker of lipid peroxidation and products that reflect oxidative damage to DNA (Chen, Wu, & Huang, 2005)
Summary
Reactive oxygen species (ROS) are spontaneously generated in cells during metabolism and are implicated in the aeitology of different diseases, such as heart diseases, stroke, rheumatoid arthritis, diabetes and cancer (Halliwell, Gutteridge, & Cross, 1992). Oxidative stress is due to the decrease in natural cell antioxidant activity or due to an increased quantity of ROS in the organisms. It has been found that apart from the ornamental use of rose species, rose plants (petals, leaves and rose hip) have been used in many countries of the world for their medicinal properties, both antioxidant and antimicrobial. The present study is aimed to uncover the antioxidant properties of local rose species for their possible use in food and pharmaceuticals
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