Browsing by Author "Niti Pathak"

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Quantitative dissection of antioxidative bioactive components in cultivated and wild sesame germplasm reveals potentially exploitable wide genetic variability
(Korean Society of Crop Science, 2014) Niti Pathak; Ashwani Kumar Rai; Supradip Saha; Suresh Walia; Soumitra Kumar Sen; Kangila Venkataraman Bhat
Sesame (Sesamum indicum L.) is one of the oldest oilseed crops grown in India and worldwide. This oilseed crop has high nutritional value due to the presence of antioxidants such as lignans and tocopherols. Screening of oilseed germplasm for important nutritional attributes is of prime importance in quality breeding programs. In the present study, the content of lignans (sesamin and sesamolin) and tocopherol homologues (α-, γ-, and δ-tocopherol) was determined using reverse phase HPLC (RP-HPLC) in 143 sesame lines collected from diverse agro-ecological zones of India. Exploitable levels of sesamin, sesamolin, γ-, and δ-tocopherol was observed in the studied sesame lines. Sesamum indicum cultivar CO 1, introgressed line MKN 9, and Sesamum malabaricum showed high values for sesamin. Exotic and indigenous accessions of S. indicum (EC 542283 and IC 132176, IC 204681, IC 204773) showed high sesamolin contents. Cultivars, AKT 64, AKT 101, Phule til 1, and Tapi A showed high values for γ- and δ-tocopherol. The average content of sesamin and sesamolin was 0.86 and 0.50 mg g-1 seed, respectively. The average tocopherol content (292 μg g-1 seed) found in this study indicates the presence of a high amount of tocopherol in Indian sesame germplasm. Superior genotypes of sesame reported in this study could be utilized in sesame breeding programs for enhancing oil yield and nutritional attributes. © 2014 Korean Society of Crop Science and Springer Science+Business Media Dordrecht.
Sesame: Bioactive Compounds and Health Benefits
(Springer Science and Business Media B.V., 2019) Niti Pathak; Asani Bhaduri; Ashwani K. Rai
Sesame is a valuable oilseed crop that contains various nutritionally rich bioactive compounds including lignans, tocopherol homologues, phytosterols, etc. Lignans are the product of oxidative coupling of β-hydroxyphenylpropane. Sesame has a combination of glycosylated lignans and oil-dispersed lignans. Based on their medicinal and pharmacological properties, the most important lignans are sesamin, sesamol, sesamolin, and sesaminol. Tocopherols (vitamin E compounds) are the lipid-soluble free radicals and constitute a major part of human diet. In sesame seeds, α-, γ-, and δ-tocopherols are found as tocopherol homologues. In addition to lignans and tocopherols, sesame is an important source of phytosterols, phytates, polyunsaturated fatty acids, and bioactive peptides. However, utilization potential of many of these compounds has not yet been fully understood. This chapter delves into the presence of multifarious bioactive components in sesame seeds, their biosynthetic pathway, and functional importance. © 2019, Springer Nature Switzerland AG.
Value addition in sesame: A perspective on bioactive components for enhancing utility and profitability
(Medknow Publications, 2014) Niti Pathak; A.K. Rai; Ratna Kumari; K.V. Bhat
Sesame seed is a reservoir of nutritional components with numerous beneficial effects along with health promotion in humans. The bioactive components present in the seed include vital minerals, vitamins, phytosterols, polyunsaturated fatty acids, tocopherols and unique class of lignans such as sesamin and sesamolin. The presence of phenylpropanoid compounds namely lignans along with tocopherols and phytosterols provide defense mechanism against reactive oxygen species and increases keeping quality of oil by preventing oxidative rancidity. In this article, we have reviewed the nutraceutical, pharmacological, traditional and industrial value of sesame seeds with respect to bioactive components that hold high antioxidant value. Valuable information on superior functional components of sesame will strongly promote the use of sesame seeds in the daily diet world-wide. In spite of huge repertoire of sesame germplasm collection, limited research efforts on the use of conventional and biotechnological methodologies have resulted in minimal success in developing nutritionally superior cultivars. In consequence, value addition efforts in sesame would enable development of genotypes with high antioxidant activity and subsequently prevention of free radical related diseases. Modification of bioactive components in sesame would enable production of stabilized sesame oil with enhanced shelf life and better market value.