Browsing by Subject "Phenol"

Now showing 1 - 3 of 3

Open Access
Antioxidant Potential of Canna: an overview
(University of North Bengal, 2014-03) Mishra, Tanmayee; Sen, Arnab
Canna, the solitary genus of the family Cannaceae and order Zingiberales, comprises of about 51 species of flowering plants. Canna species are native of South America but with the course of time they have been distributed throughout the world. It is an important plant not only from the ornamental point of view but also it is an important plant for starch production as well as its medicinal values. From the primitive time, village people commonly use Canna as herbal medicines in their daily dealings. Different plant parts like rhizome and leaves of Canna have been used for the treatment of inflammatory diseases, fever, hypertension, diabetes, menstrual disorders, malaria etc. Phytochemicals with high antioxidant activities reported from the members of genus Canna. Moreover, isolation and identification of chemical compounds shows the presence of derivatives of polysaccharide, anthocyanin and phenylpropanoid compounds. The present study reflects a comprehensive review on biological activities of Canna species with special reference to some other members of Zingiberales.
Open Access
Free radical scavenging activity of ornamental and edible cultivars of Canna found in Eastern India
(University Of North Bengal, 2011-03) Mishra, T; Goyal, AK; Mondal, P; Sen, A
Canna, the only genus of family Cannaceae, found in eastern India have gained economic importance for their starchy rhizomes and attractive flowers. The rhizome of some edible cultivars are consumed as food and herbal medicines in rural areas. The presence of total phenols, flavonoids and DPPH scavenging activity of both cold and hot extracts and their correlations have been studied for eleven cultivars of Canna spp. Antioxidants, quercetin and gallic acid equivalence of phenolic compounds were determined spectrophotometrically. It has been found that total phenol, flavonoids and DPPH free radical scavenging activity were higher in hot extracts than in cold. Further studies gave an idea about the correlation between phenol and flavonoid contents of both cold and hot extracts, but both the above said parameters were not correlated with DPPH scavenging activity. Finally it can be concluded that higher DPPH scavenging activities in all these Canna cultivars may not be due to the presence of endogenous phenols and flavonoids but these may be due to any other phytochemicals.
Open Access
ROS production, H2O2 detection and biochemical characterization of water stressed wheat (Triticum aestivum L.) varieties
(University of North Bengal, 2012-03) Pradhan, B.; Chakraborty, U.
One month old plant of four varieties (MW, KD, GY and GN) of wheat (Triticum aestivum L.) was taken and subjected to water stress for 3, 6 and 9 days. RWC was found to be higher in case of GY and KD when compared to MW and GY. There was an initial enhancement in the activities of all five tested antioxidative enzymes- peroxidase, ascorbate peroxidase, catalase, glutathione reductase and superoxide dismutase in K and GN varieties, while in MW and GY, the activity of catalase and superoxide dismutase showed a decline at all periods of water stress. Peroxidase and glutathione reductase activities increased even on 9th day of stress in K and GN, but all other activities showed a decline after 3 days of stress. The accumulation of H202, showed an increase with increasing days of water stress but in K and GN there was a decline during prolonged water stress. Lipid peroxidation increased significantly which was higher in case of MW and GY. With increase in the duration of water stress proline, phenol and ascorbate content increased. Higher values of MSI and total antioxidant were observed in the cultivar KD and GY with increase in the severity of water stress than in MW and GY. After an initial enhancement the content of carotenoid increased followed by a decline. Total chlorophylls showed a general decline during water stress, but the ratio of chla/b showed an initial increase in the 3rd day of water stress which declined during the latter stages of water stress. Results of the present study indicate that two of the varieties- MW and GY are susceptible to water stress, while the other two-K and GN is tolerant.