Physiological and Biochemical Response of Alternanthera bettzickiana (Regel) G. Nicholson under Acetic Acid Assisted Phytoextraction of Lead.
Physiological and Biochemical Response of Alternanthera bettzickiana (Regel) G. Nicholson under Acetic Acid Assisted Phytoextraction of Lead.
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DOI：
10.3390/plants9091084
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发表时间：
2020-08-24
期刊：
影响因子：
--
通讯作者：
Wijaya L
中科院分区：
文献类型：
--
作者：
Latif U;Farid M;Rizwan M;Ishaq HK;Farid S;Ali S;El-Sheikh MA;Alyemeni MN;Wijaya L
重金属（HMs）胁迫会对植物的生理和生物化学造成严重损害，导致生长发育不良和低产。通过植物提取进行植物修复，这是一种可行的低成本且环保的替代技术，可替代其他通常过于昂贵、不切实际且危险的技术。然而，各种植物物种对HMs胁迫的植物提取潜力、生理生化反应尚不完全清楚。在其他重金属中，铅 (Pb) 是一种具有有害生物效应的无机污染物。添加有机酸可以提高 Pb 的生物利用度和迁移率。进行了盆栽规模实验，以评估 Pb 对 Alternanthera bettzickiana (Regel) G. Nicholson 的影响及其在有或没有乙酸 (AA) 的情况下积累 Pb 的能力。结果表明，Pb 对 A. bettzickiana 造成了显着的损害，其生态毒性很明显，在 Pb 胁迫下，脂质过氧化水平增加了 107%。观察到株高（32%）、根长（21%）、叶面积（38%）和单株叶片数量（46%）显着下降。另一方面，向 Pb 胁迫植物施用 AA 后，抗坏血酸过氧化物酶 (APX) 和过氧化氢酶 (CAT) 的活性分别提高了 16% 和 21%，从而减少了氧化损伤。此外，添加 AA 显着提高了植物总叶绿素 (15%) 和类胡萝卜素 (50%)。施用AA还促进叶、茎和根中Pb的积累分别达到70%、65%和66%。本研究得出结论，AA 能够增强植物对 Pb 的提取，支持 Pb 胁迫条件下的植物生长和生理机能。
Heavy metals (HMs) stress causes severe damage to physiology and biochemistry of plant species leading to stunted growth and low yield. Phytoremediation via phytoextraction, a viable low-cost and environment-friendly alternative to other techniques that are often too expensive, impractical and hazardous. However, phytoextraction potential, physiological and biochemical response of various plant species against HMs stress is not fully understood. Among other HMs, lead (Pb) is an inorganic pollutant with deleterious biotic effects. Bioavailability and mobility of the Pb can be enhanced by addition of organic acids. A pot scale experiment was done to assess the effects of Pb on Alternanthera bettzickiana (Regel) G. Nicholson and its ability to accumulate Pb with or without acetic acid (AA). The Results showed that Pb caused significant damage in A. bettzickiana, and its ecotoxicity was evident from increased levels of lipid peroxidation up to 107% under Pb stress. The significant decrease in plant height (32%), root length (21%), leaf area (38%) and number of leaves per plant (46%) was observed. On the other hand, application of AA to Pb stressed plants reduced the oxidative damage by further enhancing the activities of ascorbate peroxidase (APX) and catalases (CAT) up to 16% and 21% respectively. Moreover, addition of AA significantly improved plant total chlorophylls (15%) and carotenoids (50%). The application of AA also promoted Pb accumulation in leaf, stem and roots up to 70%, 65% and 66% respectively. This research concluded that AA has the ability to enhance the phytoextraction of Pb and support the plant growth and physiology under Pb stress condition.
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