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Antimony symplastic and apoplastic absorption, compartmentation, and xylem translocation in Brassica parachinensis L. under antimonate and antimonite

文献类型： 外文期刊

作者： Wu, Zhichao 1 ; Jiang, Qi 1 ; Yan, Tao 1 ; Xu, Shoujun 1 ; Shi, Hanzhi 1 ; Peng, Lijun 2 ; Du, Ruiying 1 ; Zhao, Xiaohu 3 ;

作者机构： 1.Guangdong Acad Agr Sci, Publ Monitoring Ctr Agroprod, Guangzhou 510640, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Testing & Evaluat Agroprod Safety & Qual, Guangzhou, Peoples R China

3.Hubei Prov Engn Lab New Type Fertilizer, Wuhan, Peoples R China

4.Huazhong Agr Univ, Microelement Res Ctr, Wuhan, Peoples R China

关键词： Antimony; Absorption; Transport; Accumulation; Brassica parachinensis L

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.291； 五年影响因子：6.393 ）

ISSN： 0147-6513

年卷期： 2020 年 197 卷

页码：

收录情况： SCI

摘要： Antimony (Sb) excess accumulation in edible parts of crops causes potential risks to human health. However, knowledge about the mechanisms of its accumulation within vegetable plants is still not well known. Here, we investigated the physiological processes of Sb involved in symplastic and apoplastic absorption, compartmentation by roots, and translocation in xylem in Brassica parachinensis L. exposed to antimonate (SbV) and antimonite (SbIII) forms. The results showed that plants treated with SbIII emerged to be more toxic than SbV as proved by the lower biomass and the higher concentrations of malonaldehyde (MDA) and hydrogen peroxide (H2O2) in plant tissues, especially at high dosages. The Sb concentration showed more in shoots but less in roots treated with SbV than with SbIII. The total Sb accumulation was higher under the SbV treatment than the SbIII treatment, mainly due to the higher accumulation in shoots. Additionally, the Sb concentration in symplastic flow of roots was higher exposed to SbV than SbIII, while no differences were found for the Sb concentration in apoplastic flow between them. Moreover, the Sb concentration in cell walls of roots was higher exposed to SbIII than SbV, especially at high levels. Furthermore, the Sb concentration in xylem was higher exposed to SbV than SbIII, and a greatly positive correlation was observed between the Sb concentrations in xylem and shoots. Overall, these findings revealed that vegetable plants accumulated more SbV than SbIII in edible parts mainly due to xylem translocation rather than root absorption.

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