首页> 外文期刊>International Journal of Ecology & Enviromental Sciences >Evaluation of Antioxidant Defense and Phytoremediation Efficacy of a Submerged Aquatic Macrophyte Hydrilla verticillata(L.f.) Royle under Lead Stress
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Evaluation of Antioxidant Defense and Phytoremediation Efficacy of a Submerged Aquatic Macrophyte Hydrilla verticillata(L.f.) Royle under Lead Stress

机译:铅胁迫下水生大型水生黑藻(Royle verticillata(L.f。)Royle)的抗氧化防御和植物修复功效的评估

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摘要

Lead-induced antioxidative response of a submerged aquatic macrophyte Hydrilla verticillata was investigated under laboratory condition. The plant was collected from a fresh water pond and bioassayed with varying concentrations of Pb for fifteen days. The activities of enzymatic antioxidants such as Catalase, Superoxide dismutase, Monodehydro ascorbate reductase, Glutathione reductase, Ascorbate peroxidase, Polyphenol oxidase and Phenyl alanine ammonia lyase and non-enzymatic antioxidants (carotenoid, flavonoid, proline, phenol and ascorbate) were analyzed. Phytoremediation efficacy of the macrophyte for lead was evaluated and supported with the quantification of Bioconcentration Factor (BCF). Data were statistically analyzed and levels of significance were recorded. SOD activity, phenol (P-value<0.0001) and proline (P-value=0.0009) accumulation were extremely significant in treated plants as compared to control. APX, GR, PAL, CAT, MDHAR and PPO activity were significant in metal treated plants than control. Very significant amounts of carotenoid and flavonoid were encountered while ascorbate content remained non-significant. Enzymatic and non-enzymatic antioxidants were positively correlated with biosorption of Pb and were significant. Significant lead accumulation suggested that Hydrilla verticillata was a promising candidate for phytoremediation of Pb. The present study helped assess the enzymatic and non-enzymatic antioxidant defense in Hydrilla verticillata suggesting the enhanced activation of SOD and increased accumulation of phenol and proline as a biomarker of Pb stress and tolerance.
机译:在实验室条件下研究了铅对淹没水生植物Hydrilla verticillata的抗氧化反应。从淡水池塘收集植物,并用不同浓度的铅进行生物分析十五天。分析了酶抗氧化剂的活性,如过氧化氢酶,超氧化物歧化酶,一氢脱氢抗坏血酸还原酶,谷胱甘肽还原酶,抗坏血酸过氧化物酶,多酚氧化酶和苯丙氨酸氨裂解酶以及非酶抗氧化剂(类胡萝卜素,类黄酮,脯氨酸,苯酚和抗坏血酸)的活性。评估了大型植物对铅的植物修复功效,并通过生物浓缩因子(BCF)的定量进行了支持。对数据进行统计分析并记录显着性水平。与对照相比,处理过的植物中SOD活性,苯酚(P值<0.0001)和脯氨酸(P值= 0.0009)的积累非常显着。在金属处理的植物中,APX,GR,PAL,CAT,MDHAR和PPO活性显着高于对照。遇到非常大量的类胡萝卜素和类黄酮,而抗坏血酸含量保持不显着。酶促和非酶促抗氧化剂与Pb的生物吸附呈正相关,并且具有显着性。大量的铅积累表明,Hydrilla verticillata是对Pb进行植物修复的有前途的候选物。本研究帮助评估了Hydrilla verticillata中的酶促和非酶促抗氧化剂防御作用,表明SOD的激活增强,苯酚和脯氨酸的积累作为铅胁迫和耐受性的生物标记。

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