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The growth of plants and indigenous bacterial community were significantly affected by cadmium contamination in soil-plant system

文献类型： 外文期刊

作者： Du, Yunyan 1 ; Zhang, Dawei 1 ; Zhou, Dinggang 1 ; Liu, Lili 1 ; Wu, Jinfeng 1 ; Chen, Hongsong 4 ; Jin, Decai 2 ; Yan, M 1 ;

作者机构： 1.Hunan Univ Sci & Technol, Sch Life Sci, Xiangtan 411201, Peoples R China

2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples R China

3.Hunan Key Lab Econ Crops Genet Improvement & Inte, Xiangtan 411201, Peoples R China

4.Guangxi Acad Agr Sci, Plant Protect Res Inst, Guangxi Key Lab Biol Crop Dis & Insect Pests, Nanning 530007, Peoples R China

关键词： Cd; Bacterial community; Oilseed rape; Soil; Phyllosphere; Endophyte

期刊名称：AMB EXPRESS （ 影响因子：3.298； 五年影响因子：3.427 ）

ISSN： 2191-0855

年卷期： 2021 年 11 卷 1 期

页码：

收录情况： SCI

摘要： Concentrations of heavy metals continue to increase in soil environments as a result of both anthropogenic activities and natural processes. Cadmium (Cd) is one of the most toxic heavy metals and poses health risks to both humans and the ecosystem. Herein, we explore the impacts of Cd on a soil-plant system composed of oilseed rapes (Brassica napus and Brassica juncea) and bacteria. The results showed that Cd accumulation within tissues of two species of oilseed rapes enhanced with increasing concentrations of Cd in soils, and Cd treatment decreased their chlorophyll content and suppressed rapeseeds growth. Meanwhile, Cd stress induced the changes of antioxidative enzymes activities of both B. napus and B. juncea. Response to Cd of bacterial community was similar in soil-two species of oilseed rapes system. The impact of Cd on the bacterial communities of soils was greater than bacterial communities of plants (phyllosphere and endophyte). The alpha-diversity of bacterial community in soils declined significantly under higher Cd concentration (30 mg/kg). In addition, soil bacterial communities composition and structure were altered in the presence of higher Cd concentration. Meanwhile, the bacterial communities of bulk soils were significantly correlated with Cd, while the variation of rhizosphere soils bacterial communities were markedly correlated with Cd and other environmental factors of both soils and plants. These results suggested that Cd could affect both the growth of plants and the indigenous bacterial community in soil-plant system, which might further change ecosystem functions in soils.

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