Umakanta Sarker, Shinya Oba
Abstract The study was performed to explore physiological, non-enzymatic and enzymatic detoxification pathways of reactive oxygen species (ROS) in tolerance of Amaranthus tricolor under drought stress. The tolerant genotype VA13 exhibited lower reduction in growth, photosynthetic pigments, relative ...
Umakanta Sarker, Shinya Oba
BACKGROUND: Bioactive compounds, vitamins, phenolic acids, flavonoids of A. tricolor are the sources of natural antioxidant that had a great importance for the food industry as these detoxify ROS in the human body. These natural antioxidants protect human from many diseases such as cancer, arthritis...
Umakanta Sarker, Shinya Oba
The investigation was carried out to elucidate growth, anatomical, physiological, and major ROS detoxification pathway involved in tolerance of A. tricolor under salinity stress. Both VA14 and VA3 varieties exhibited the reduction in RWC, photosynthetic pigments, growth, and increased electrolyte le...
Umakanta Sarker, Shinya Oba
Four selected Amaranthus tricolor cultivars were grown under four irrigation regimes (25, 50, 80, and 100% field capacity) to evaluate the mechanisms of growth and physiological and biochemical responses against drought stress in randomized complete block design with three replications. Drought stre...
Umakanta Sarker, Shinya Oba
Amaranthus tricolor genotype VA13 was evaluated under four salinity stress in terms of color parameters, leaf pigments, β-carotene, vitamin C, TPC, TFC, TAC, phenolic acids and flavonoids. Salinity stress significantly increases all the studied traits. The increments of all these compounds were high...
Umakanta Sarker, Shinya Oba
Four selected vegetable amaranths were grown under four soil water content to evaluate their response in nutrients, minerals, antioxidant leaf pigments, vitamins, polyphenol, flavonoid and total antioxidant activity (TAC). Vegetable amaranth was significantly affected by variety, soil water content ...
Umakanta Sarker, Shinya Oba
Abstract BACKGROUND Amaranthus tricolor is a unique source of betalain (β‐cyanin and β‐xanthin) and a source of natural antioxidants, such as leaf pigments, vitamins, polyphenols and flavonoids in leafy vegetables. It has substantial importance for the food industry, since these compounds detoxify r...
Umakanta Sarker, Md. Motaher Hossain, Shinya Oba
Abstract Amaranth has two morphological types described as red and green morphs. Previous studies have extensively characterised red morph amaranth regarding both morphological and chemical properties including antioxidant activity, antioxidant phytochemical profile, mineral content and proximate co...
Umakanta Sarker, Shinya Oba
Abstract Six selected weedy Amaranthus genotypes (three accessions from each species of A. viridis and A. spinosus ) were evaluated in terms of nutrients, minerals, antioxidant constituents and antioxidant activity for the possibilities of weedy species as a vegetable cultivar in a randomized comple...
Umakanta Sarker, Tofazzal Islam, Shinya Oba
Impact of salinity stress were investigated in three selected Amaranthus tricolor accessions in terms of nutrients, dietary fiber, minerals, antioxidant phytochemicals and total antioxidant activity in leaves. Salinity stress enhanced biochemical contents and antioxidant activity in A. tricolor leav...
Umakanta Sarker, Shinya Oba
Abstract Red color ( A . tricolor ) genotypes are an excellent source of pigments, such as betalain (1122.47 ng g −1 FW), β-xanthin (585.22 ng g −1 FW), β-cyanin (624.75 ng g −1 FW), carotenoids (55.55 mg 100 g −1 FW), and antioxidant phytochemicals, such as vitamin C (122.43 mg 100 g −1 FW), TFC (3...
Umakanta Sarker, Shinya Oba
BACKGROUND: Red amaranth (Amaranthus gangeticus L.) has great diversity in Bangladesh, India, and South East Asia with multipurpose uses. The bright red-violet colored A. gangeticus is a popular and low-cost leafy vegetable in the Asian continent including Bangladesh and India because of attractive ...
Umakanta Sarker, Shinya Oba, Moses Ahmed Daramy
Abstract We evaluated 17 genotypes of stem amaranth ( Amaranthus lividus ) in terms of dietary fiber, moisture, carbohydrates, fat, ash, gross energy, protein, minerals, phytopigments, total antioxidant capacity (TAC), vitamins, total flavonoids (TFC), total polyphenols (TPC) and their variations. S...
Umakanta Sarker, Shinya Oba
Amaranth has two morphological types (morphs), one is red and another is green morph. Red morph amaranth is a marvelous source of nutrients, antioxidant pigments, minerals, and phytochemicals compared to green morph amaranth. For this purpose, we selected 25 red morph genotypes to evaluate in terms ...
Umakanta Sarker, Shinya Oba
Abstract Four selected advance lines of drought-tolerant leafy vegetable amaranth were characterized for phenolic profiles, vitamins, and antioxidant activities. The selected advance lines exhibited differences in terms of genotypes with remarkable phenols, vitamins, flavonoids content, and potentia...