文献类型： 外文期刊

作者： Li, Xin ¹ ; Zhang, Mingxing ³ ; Zhang, Qingzhuang ³ ; Tan, Fangjun ³ ; Gong, Zheng ³ ; Xie, Yunhe ² ; Tao, Yu ¹ ; Chen, Jie ¹ ;

作者机构： 1.Hunan Acad Agr Sci, Changsha, Hunan, Peoples R China

2.Hunan Inst Agr Environm & Ecol, Changsha, Hunan, Peoples R China

3.Hunan Vegetables Res Inst, Changsha, Hunan, Peoples R China

4.Minist Agr, Key Lab Agroenvironm Midstream Yangtze Plain, Changsha, Peoples R China

5.Hunan Key Lab Agrofarmland Heavy Met Pollut Contr, Changsha, Hunan, Peoples R China

关键词： pyrroloquinoline quinone; soil available nutrients; soil pathogens; microbial community

期刊名称：MICROBIOLOGY SPECTRUM （ 影响因子：9.043； 五年影响因子：8.113 ）

ISSN： 2165-0497

年卷期：

页码：

收录情况： SCI

摘要： Imbalances of soil available nutrients and soilborne diseases have seriously restricted the productivity of crops and jeopardized food security worldwide. Pyrroloquinoline quinone (PQQ), a redox cofactor in some bacteria involved in glucose metabolism and phosphorus mineralization, could be anticipated to alter soil ecosystems to a certain extent. However, there is limited information on PQQ defending soilborne pathogens and regulating soil main nutrients. Here, a pot experiment based on mono-cropping soils of pepper was conducted to examine the effects of PQQ amendment on reconstructing soil microbial communities and soil nutrients under aerobic/anaerobic conditions comprising three treatments, namely, control, PQQ (aerobic), and FL-PQQ (anaerobic). The results revealed that soil microbial community composition and soil nutrients were distinctly altered by PQQ regimes. Compared to control, PQQ treatment significantly increased the content of soil available phosphorus (AP), while FL_PQQ treatment strongly improved the content of soil available nitrogen (AN). In terms of pathogens, relative to control, both PQQ treatments suppressed the abundances of pathogens, of which FL_PQQ treatment significantly decreased the abundance of the pathotrophic fungal by 64% and the abundance of Fusarium oxysporum by 57%, largely attributed to the increase of organic acid generators (Oxobacter, Hydrogenispora) and potential antagonists (Bacillus, Talaromyces). Structural equation modeling (SEM) showed that PQQ regimes suppressed pathogens by indirectly regulating soil physicochemical properties and microbial communities. Overall, we proposed that PQQ application both in aerobic/anaerobic conditions could improve soil available nutrients and suppress soil pathogens in pepper monocropping soils. IMPORTANCE The attention to PQQ (pyrroloquinoline quinone) effect on soil nutrients and pathogens was less paid in monocropping soils. However, the underlying microbial interacting mechanism remains unclear. Adopting a novel external bio-additive, the effects of PQQ on soil main nutrients and the pathotrophic fungal under aerobic and anaerobic regimes will be investigated, which would help to improve soil quality health. Our main conclusion was that PQQ would help to remediate monocropping obstacle soils in terms of soil nutrients and soil pathogens by associating with the microbial community, and anaerobic PQQ application more favored amelioration of continuous obstacle soils. These results will benefit the health and sustainable development of pepper production as well as other greenhouse vegetable production. The attention to PQQ (pyrroloquinoline quinone) effect on soil nutrients and pathogens was less paid in monocropping soils. However, the underlying microbial interacting mechanism remains unclear.