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

AMB Express

Hongsong Chen¹  Decai Jin²  Jinfeng Wu³  Dinggang Zhou³  Mingli Yan³  Dawei Zhang³  Lili Liu³  Yunyan Du⁴ 

[1] Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, 530007, Nanning, People’s Republic of China;Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 100085, Beijing, People’s Republic of China;Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, 530007, Nanning, People’s Republic of China;School of Life Sciences, Hunan University of Science and Technology, 411201, Xiangtan, People’s Republic of China;Hunan Key Laboratory of Economic Crops Genetic Improvement and Integrated Utilization, 411201, Xiangtan, People’s Republic of China;School of Life Sciences, Hunan University of Science and Technology, 411201, Xiangtan, People’s Republic of China;Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 100085, Beijing, People’s Republic of China;

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

DOI  :  10.1186/s13568-021-01264-y

来源: Springer

【 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 α-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.

【 授权许可】

CC BY