Effect of Aspergillus niger NBC001 on the soybean rhizosphere microbial community in a soybean cyst nematode-infested field

doi:10.1016/S2095-3119(20)63467-0

摘要/Abstract

摘要：

大豆孢囊线虫是世界范围内大豆生产的重要病原之一，生物防治目前已成为大豆孢囊线虫病防治的重要手段。黑曲霉NBC001由本实验室从小麦孢囊线虫群体上分离获得，其发酵液拌种在盆栽中不仅可以有效防治大豆孢囊线虫，而且对大豆具有一定的促生作用。本研究将在田间评价NBC001对大豆孢囊线虫的防治效果及对大豆根际土壤产生的微生态效应。研究结果表明在田间应用黑曲霉NBC001发酵浓缩液拌种可以有效防治大豆孢囊线虫病，防效达31.7%。高通量测序结果显示黑曲霉NBC001对大豆根际土壤微生物多样性和群落结构无显著影响，表明NBC001发酵浓缩液拌种对土壤生态环境安全。在大豆定植10天时，黑曲霉 NBC001促进了大豆根际土壤中放线菌门Actinobacteria，酸杆菌门Acidobacteria，叶瘤菌属Phyllobacterium，雷尔氏菌属Ralstonia和H16的丰度；而降低拟杆菌门Bacteroidetes，芽单胞菌门Gemmatimonadetes，Adhaeribacter，芽单胞菌属Gemmatimonas，鞘氨醇单胞菌属Sphingomonas，Flavisolibacter的丰度。在定植90 d时，影响程度减小，仅增加气微菌属Aeromicrobium和RB41属的丰度，降低H16的丰度，说明其对大豆根际土壤微生物物种丰度的影响是短暂的。同时结果也表明黑曲霉NBC001可以增加大豆根际土壤中有益微生物放线菌门、酸杆菌门、气微菌属和叶瘤菌属的丰度。综上所述生防菌黑曲霉NBC001对大豆根际土壤微生物无显著影响，因此在田间应用黑曲霉NBC001对土壤生态环境安全。研究结果将为黑曲霉NBC001的安全应用奠定理论基础，为大豆孢囊线虫病生物防治提供高效生防菌株。

Abstract:

Soybean cyst nematode (SCN, Heterodera glycines Ichinohe) is one of the most important pests causing considerable damage to soybean (Glycine max (L.) Merr.) around the world. Biocontrol provides a strategy for sustainable nematode control. Previously, Aspergillus niger NBC001 was isolated from the cysts of Heterodera spp. and able to control H. glycines and promote the growth of soybean in a pot experiment. In this study, the effects of NBC001 on H. glycines density and on the soybean rhizosphere microbial community in a soybean cyst nematode-infested field were studied. The results showed that NBC001 could suppress H. glycines by 31.7% in the field. High-throughput sequencing analysis showed that NBC001 had no significant influence on soybean rhizosphere microbial community structure, indicating that seed coat-dressing with the concentrated culture filtrate of NBC001 was safe for the soil ecological environment. In addition, high-throughput sequencing results demonstrated that at 10 days post transplantation, NBC001 increased the abundances of Actinobacteria and Acidobacteria, but decreased the abundances of Bacteroidetes and Gemmatimonadetes at the phylum level. Meanwhile, the abundances of Phyllobacterium, Ralstonia and H16 were increased, while the abundances of Adhaeribacter, Gemmatimonas, Sphingomonas, Flavisolibacter were suppressed by application of NBC001. However, at 90 days post transplantation, NBC001 only increased the abundances of Aeromicrobium and RB41 whereas it decreased the abundance of H16. The results indicated that application of NBC001 increased the relative abundances of the beneficial microorganisms such as Actinobacteria, Acidobacteria, Aeromicrobium and Phyllobacterium in the soil. In summary, NBC001 is an eco-friendly biocontrol agent for H. glycines control.

Key words:

Aspergillus niger NBC001 , biocontrol , Heterodera glycines , high-throughput sequencing , microbial community

. [J]. Journal of Integrative Agriculture, 2021, 20(12): 3230-3239.

JIN Na, LIU Shi-ming, PENG Huan, HUANG Wen-kun, KONG Ling-an, PENG De-liang. Effect of Aspergillus niger NBC001 on the soybean rhizosphere microbial community in a soybean cyst nematode-infested field[J]. Journal of Integrative Agriculture, 2021, 20(12): 3230-3239.

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