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Mitigation of atrazine-induced oxidative stress on soybean seedlings after co-inoculation with atrazine-degrading bacterium Arthrobacter sp. DNS10 and inorganic phosphorus-solubilizing bacterium Enterobacter sp. P1

文献类型: 外文期刊

作者: Jiang, Zhao 1 ; Shao, Qi 1 ; Chu, Yuxin 1 ; An, Ning 1 ; Cao, Bo 1 ; Ren, Zheyi 1 ; Li, Jin 1 ; Qu, Jianhua 1 ; Dong, Maofeng 2 ; Zhang, Ying 1 ;

作者机构: 1.Northeast Agr Univ, Sch Resources & Environm, Harbin 150030, Peoples R China

2.Shanghai Acad Agr Sci, Pesticide Safety Evaluat Res Ctr, Shanghai 201106, Peoples R China

3.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Changchun 130132, Peoples R China

关键词: Atrazine; Bacterium; Degradation; Alleviation; Transcriptome

期刊名称:ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH ( 影响因子:5.19; 五年影响因子:5.053 )

ISSN: 0944-1344

年卷期:

页码:

收录情况: SCI

摘要: Atrazine toxicity is one of the limiting factors inhibiting sensitive plant growth. Previous studies showed that atrazinedegrading bacteria could alleviate atrazine toxicity. However, there is limited information on how atrazine-degrading bacteria and plant growth-promote bacteria alleviate atrazine toxicity in soybeans. Therefore, the current study aimed to explore the atrazine removal, phosphorus utilization, and the oxidative stress alleviation of atrazine-degrading bacterium Arthrobacter sp. DNS10 and/or inorganic phosphorus-solubilizing bacterium Enterobacter sp. P1 in the reduction of atrazine toxicity in soybean. The results showed that atrazine exposure to soybean seedlings led to significant inhibition in growth, atrazine removal, and phosphorus utilization. However, the co-inoculatied strains significantly increased seedlings biomass, chlorophyll a/b contents, and total phosphorus in leaves accompanied by great reduction of the atrazine-induced antioxidant enzymes activities and malonaldehyde (MDA) contents, as well as atrazine contents in soil and soybeans under atrazine stress. Furthermore, transcriptome analysis highlighted that co-inoculated strains increased the expression levels of genes related to photosynthetic-antenna proteins, carbohydrate metabolism, and fatty acid degradation in leaves. All the results suggest that the co-inoculation mitigates atrazine-induced oxidative stress on soybean by accelerating atrazine removal from soil and phosphorus accumulation in leaves, enhancing the chlorophyll contents, and regulating plant transcriptome. It may be suggested that co-inoculation of atrazine-degrading bacteria and inorganic phosphorus-solubilizing bacteria can be used as a potential method to alleviate atrazine toxicity to the sensitive crops.

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