Lead accumulation and biochemical responses in Rhus chinensis Mill to the addition of organic acids in lead contaminated soils.
Lead accumulation and biochemical responses in Rhus chinensis Mill to the addition of organic acids in lead contaminated soils.
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添加有机酸是辅助植物修复的有效途径。有机酸对盐肤木植物修复效果的影响尚不清楚。研究了柠檬酸（CA）和草酸（OA）对重金属铅植物修复的影响。在铅污染的土壤中，中华绒螯蟹的生长受到显著抑制。通过盆栽试验研究了红毛菊的长期生理响应和金属积累模式。结果表明：0.5和1.0 mmol L−1的CA和OA对中华红毛白杨（R. chinensis）的生长、氧化胁迫、抗氧化系统和Pb的亚细胞分布有显著影响。在含有1000 mg kg−1 Pb的花盆中种植的中国小麦。与对照相比，生物量、叶面积、根系形态参数和叶绿素含量均显著增加。在Pb胁迫下，类胡萝卜素、丙二醛、H2 O2和O2 stec −浓度以及超氧化物歧化酶（SOD）、过氧化物酶（POD）和过氧化氢酶（CAT）活性均升高。铅被植物吸收并主要贮存在根的细胞壁中。CA和OA的施用促进了植物生长。在1.0 mmol L−1 OA和0.5 mmol L−1 CA处理下，地上部和根系生物量的最高增幅分别为44.4%和61.2%。CA和OA的存在增加了SOD，POD和CAT活性，降低了H2 O2，O2 stec-和丙二醛含量。0.5 mmol L−1 CA浓度显著增加了器官中的Pb浓度。其他有机酸处理对根系铅含量的影响不大，但增加了地上部铅含量。有机酸处理的转运因子值提高了38.8- 134.1%。结果表明，有机酸可以缓解矮化红曲霉的毒性。提高植物修复效率。添加有机酸是辅助植物修复的有效途径。
Adding organic acid is an effective approach to assist phytoremediation. The effects of organic acids on phytoremediation efficiency are unknown in Rhus chinensis. This study aimed to evaluate the effect of citric acid (CA) and oxalic acid (OA) on the lead phytoremediation potential of R. chinensis with significantly inhibited growth in Pb-contaminated soil. The experimental pot culture study evaluated the long-term physiological response and metal accumulation patterns of R. chinensis grown in varying Pb-treated soil, and examined the effects of 0.5 and 1.0 mmol L−1 CA and OA on the growth, oxidative stress, antioxidant system, and Pb subcellular distribution of R. chinensis grown in pots with 1000 mg kg−1 Pb. Compared with the control, the biomass, leaf area, root morphological parameters, and chlorophyll concentration of R. chinensis decreased, whereas the carotenoid, malondialdehyde, H2O2, and O2˙− concentrations, and superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) activity increased under Pb stress. A copious amount of Pb was taken up and mainly stored in the cell walls of the roots. The application of CA and OA increased plant growth. The highest shoots and roots biomass increase recorded was 44.4 and 61.2% in 1.0 mmol L−1 OA and 0.5 mmol L−1 CA treatment, respectively. The presence of CA and OA increased SOD, POD, and CAT activities and decreased the H2O2, O2˙− and malondialdehyde content. A concentration of 0.5 mmol L−1 CA significantly increased the Pb concentration in the organs. The other organic acid treatments changed root Pb concentrations slightly while increasing shoot Pb concentrations. The translocation factor values from organic acid treatments were increased by 38.8–134.1%. Our results confirmed that organic acid could alleviate the toxicity of stunted R. chinensis and improve phytoremediation efficiency. Adding organic acid is an effective approach to assist phytoremediation.
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影响因子：
4
作者：
Kamaruzzaman, M. A.;Abdullah, S. R. S.;Idris, M.
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González-Peña MA;Lozada-Ramírez JD;Ortega-Regules AE
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