文献类型：期刊文献

英文题名：Lead accumulation and biochemical responses in Rhus chinensis Mill to the addition of organic acids in lead contaminated soils

作者：Shi, Xiang[1] Wang, Shufeng[1] He, Wenxiang[1,2] Wang, Yangdong[1]

第一作者：施翔

机构：[1] Research Institute of Subtropical Forestry, Key Laboratory of Tree Breeding of Zhejiang Province, Chinese Academy of Forestry, Hangzhou, 311400, China; [2] State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China

年份：2023

卷号：13

期号：7

起止页码：4211-4221

外文期刊名：RSC Advances

收录：EI(收录号：20230713586007);Scopus(收录号：2-s2.0-85147846588)

语种：英文

外文关键词：Aldehydes - Bioremediation - Efficiency - Physiological models - Plants (botany) - Soil pollution - Soils - Superoxide dismutase

摘要：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. ? 2023 The Royal Society of Chemistry.