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Stenotrophomonas pavanii DJL-M3 inoculated biochar stabilizes the rhizosphere soil homeostasis of carbendazim-stressed rice

文献类型： 外文期刊

作者： Feng, Fayun 1 ; Sun, Xing 1 ; Jiang, Wenqi 2 ; Ma, Liya 1 ; Wang, Ya 1 ; Sheng, Honjie 1 ; Li, Yong 1 ; Yu, Xiangyang 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Food Safety & Nutr, State Key Lab Breeding Base, Key Lab Food Qual & Safety Jiangsu Prov, Nanjing 210014, Peoples R China

2.Nanjing Univ, Sch Environm, Nanjing 210014, Peoples R China

关键词： Biochar immobilization; Soil homeostasis; Ecological niche; Rhizobacteria community; Carbendazim

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.9； 五年影响因子：9.5 ）

ISSN： 0269-7491

年卷期： 2023 年 329 卷

页码：

收录情况： SCI

摘要： Plant-microbe interactions have been effectively used in phytoremediation to reduce agrochemical contami-nation of crops and soils, but little information is available regarding the general effect of such association on rhizosphere soil homeostasis. In this study, we immobilized Stenotrophomonas pavanii DJL-M3, a carbendazim (CBZ)-degrading endophyte, in rice husk-derived biochar to control fungicide residue in the rice microenvi-ronment. The influence of biochar inoculated with strain DJL-M3 on rhizobacterial communities was also investigated, including activity and fundamental function predictions. An adsorption kinetics test showed that strain DJL-M3 slowed the adsorption rate slightly without sacrificing the adsorption capacity of rice-husk biochar on CBZ. Immobilization in biochar helped S. pavanii DJL-M3 to establish an ecological niche in rhizosphere soils. This process significantly reduced CBZ levels in rice and rhizosphere soil while maintaining stable heterotrophic microbial respiration and carbon (C) metabolic activity. Soil amendment with the strain DJL-M3-biochar composite resulted in relatively little disturbance of fundamental soil functions, such as nitrogen (N) and sulfur (S) cycling, which explained the better plant growth and higher soil fertility observed with CBZ contamination. Overall, the combination of biochar and S. pavanii DJL-M3 demonstrated the potential to safeguard the micro-biological environment of rice.

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