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VOL. 9, ISSUE 11 (2024)
Physiological and biochemical alterations in sweet potato (Ipomoea batatas (L.) exposed to excess levels of chromium (VI)
Authors
Kamlesh Kumar Tiwari
Abstract

The contamination of agricultural soils and water with chromium, mainly due to industrial and urban effluents, presents a substantial ecological risk. This study investigates the toxic effects of chromium (VI) on sweet potato (Ipomoea batatas (L.) Kiran) plants, grown in a controlled environment using refined sand pot culture with a pH range of 6.9–7.0. The research primarily examines the phytotoxic effects of elevated chromium (VI) concentrations, focusing on changes in growth, water transport, and metabolic activities.

The sweet potato plants were cultivated in a nutrient solution for 450 days before chromium (as dichromate) was introduced at concentrations of 0.00, 0.05, 0.10, and 0.25 mM. After 5-6 days of chromium (VI) exposure, visible signs of foliar toxicity emerged, starting with chlorosis (yellowing) and a loss of turgor in the older leaves, followed by similar symptoms in the middle leaves at the highest concentration (0.25 mM). Over time, the chlorosis intensified, leading to necrosis in patches, malformed leaf laminae, and weakened tendrils that lost their ability to coil. At 0.25 mM, chromium (VI) had a notably detrimental impact on sweet potato plants, leading to significant reductions in growth and development. It also hindered photosynthesis and disrupted metabolic and enzymatic processes. These results indicate that the consumption of crops with elevated chromium levels could pose health risks and reduce their nutritional value. Moreover, high chromium concentrations can interfere with plant growth and metabolic functions in the tested species.
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Pages:23-27
How to cite this article:
Kamlesh Kumar Tiwari "Physiological and biochemical alterations in<i> </i>sweet potato (<i>Ipomoea batatas</i> (L.) exposed to excess levels of chromium (VI)". International Journal of Botany Studies, Vol 9, Issue 11, 2024, Pages 23-27
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