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Browsing by Author Ahmed, Sium

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  • Comparative phytochemical, antioxidant, and antibacterial study of different parts of Doigota plants (Bixa orellana L.)

    • Authors: Ahmed, Sium;  Advisor: -;  Participants: Moni, Bilkis Mehrin; Ahmed, Shawon; Gomes, Donald James; Shohael, Mohammad (2020)

  • Phytochemical screening indicated the presence of nine different phytochemicals in varying degrees, which suggests the chemical diversity of this plant. Quantification of phenolics, flavonoids, and tannins was performed where leaf extracts contained significantly higher quantities of these phytochemicals than extracts from seed and branch. The highest phenolics (186.02 mg/g) were found in the methanolic extract of the leaf, whereas the highest flavonoids (61.01 mg/g) and tannins (36.74 mg/g) were found in aqueous extract of the leaf. Antioxidant activity has been evaluated by DPPH scavenging assay where the aqueous extract of leaf showed 93.62% scavenging activity at 800 μg/mL extract...
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  • Physiological and biochemical role of proline, trehalose, and compost on enhancing salinity tolerance of quinoa plant

    • Authors: Ahmed, Sium;  Advisor: -;  Participants: Moni, Bilkis Mehrin; Ahmed, Shawon; Gomes, Donald James; Shohael, Abdullah Mohammad (2020)

  • Growth and yield measurements were decreased with salinity stress. High levels of both proline and trehalose recorded the highest values of total soluble sugars, proline, and free amino acids in both unstressed or salinity stressed plants with or without compost addition. The use of compost in soil for cultivating quinoa plants with either proline or trehalose treatments increased growth parameters, photosynthetic pigments, and yield attributes. In addition, these treatments improved the accumulation of some organic solutes in leaves and promoted antioxidant enzyme activities.