Vegetos
(An International Journal of Plant Research & Biotechnology)
Drought stress responses in the germination; proximate composition, antioxidant and antidiabetic activities of Fava bean (Vicia faba L.) seeds grown in Manipur
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Research Articles | Published: 16 March, 2026
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Keywords: Drought, n Vicia faba L., PEG 6000, Antioxidant, Antidiabetic
Abstract
Drought stress is the prevailing and pervasive environmental challenge impeding agricultural practices and endangering crop productivity. The objective of the study is to determine the nutritional and stress tolerant capacity in three fava bean landraces of Manipur namely Pb-vf-24-1 (small seed), Pb-vf-24-2 (medium seed) and Pb-vf-24-3 (broad seed) which have been attributed due to its high content of protein, minerals, and antioxidant compounds. Drought was imposed in the germinating seedling for 15 days as the germination phase is the key period in examining stress mechanisms for variable tolerance potentiality to the PEG 6000 concentrations of 0% (control), 5%, 10%, 15%, 20%, and 25%, furnishing respective osmotic potentials of 0 MPa, −0.05 MPa, −0.15 MPa, −0.30 MPa, −0.49 MPa and, −0.73 MPa. Pb-vf-24-2 was exhibiting maximum tolerance while Pb-vf-24-1 was displaying minimum tolerance considering the germination parameters and Drought Tolerance Index (DTI). Proximate composition analysis elucidated a high-level percentage concentration of crude protein in Pb-vf-24-1 and the highest crude fiber percentage concentration in Pb-vf-24-2, rendering a good source of protein and fiber. The landraces also revealed potential antioxidant and antidiabetic activities with the IC₅₀ values of DPPH scavenging and α-amylase inhibitory activities ranging from 6–8 µg/mL and 8–14 µg/mL in comparison with the standard antioxidants, gallic acid (1.947 µg/mL), ascorbic acid (1.914 µg/mL) and standard inhibitor, acarbose (8.574 µg/mL) respectively. The high-level antioxidant activity was due to the moderately high values of phenolic and flavonoid contents in mg.GAE/g extracts and mg.QE/g extracts of the seed samples with the highest being shown by Pb-vf-24-2. Mineral contents of the seeds discovered that broad beans of Manipur were a good source of essential nutrient elements.
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Author Information
Department of Life Sciences (Botany), Manipur University, Canchipur, India