Physiological mechanisms of some aquatic plants to tolerate lead element pollution in water | ||
| Al-Azhar Journal of Agricultural Research | ||
| Volume 48, Issue 3, October 2023, Pages 161-178 PDF (1.69 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ajar.2024.207884.1150 | ||
| Authors | ||
| Essam-Eldin Abdel baset Mohamed Ahmed* 1; Hossany Esmail Abo-Elenin2; Elsayed hassan Elkafafi3 | ||
| 1قسم النبات الزراعى، كلية الزراعة ، جامعة الأزهر، القاهرة، مصر | ||
| 2قسم النبات الزراعى،كلية الزراعة، جامعة الأزهر، القاهرة، مصر | ||
| 3قسم النبات الزراعى، كلية الزراعة، جامعة الأزهر، القاهرة، مصر | ||
| Abstract | ||
| Lead (Pb) heavy metal pollution in waterways has become one of major issues across the world. A hydroponics experiment was aimed at investigating the physiological and biochemical response and phytoremediation ability of three aquatic floating macrophytes Eichhornia crassipes, Pistia stratiotes and Ludwigia stolonifera plants grown under different treatments of Pb(CH₃COO)₂. With an increase in lead concentration in growth medium the element's accumulation in plant parts increased and the accumulation of the element increased in the roots more than its accumulation in the shoots for all tested plants. In studying the response of these plants to Pb stress, we observed inhibited plant growth % and decreased photosynthetic pigments, membrane stability index (MSI) and proteins. In addition, heavy metal induced oxidative damage as observed by increased lipid peroxidation (MDA) and electrolyte leakage (EL) levels in all species. Antioxidative enzymes activity such as catalase (CAT) and peroxidase (POX) and proline accumulation were positively correlated with Pb treatment. The plants were ideal for phytoremediation because of their rapid rate of growth, extensive root system, high biomass output, and capacity to accumulate and tolerate Pb. | ||
| Keywords | ||
| aquatic plants; Pb accumulation; chlorophyll content; antioxidant enzymes; proline | ||
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