生防菌f.sp. 对不同玉米根际中的本地总真菌群落和特定丛枝菌根真菌类群没有不利影响。

Biocontrol agent f.sp. has no adverse effect on indigenous total fungal communities and specific AMF taxa in contrasting maize rhizospheres.

作者信息

Zimmermann Judith, Musyoki Mary K, Cadisch Georg, Rasche Frank

机构信息

Institute of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), University of Hohenheim, Stuttgart, Germany.

出版信息

Fungal Ecol. 2016 Oct;23:1-10. doi: 10.1016/j.funeco.2016.05.007.

DOI:10.1016/j.funeco.2016.05.007

PMID:27721900

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5045157/

Abstract

We studied the effects of f.sp. (Fos), a soil-borne biocontrol agent (BCA) against , on total fungal and arbuscular mycorrhizal fungal (AMF) taxa in rhizospheres of maize in both clayey and sandy soil. Effects of Fos-BCA 'Foxy-2' were evaluated against (1) presence, and (2) organic fertilization with residues at 14, 28 and 42 d after 'Foxy-2' inoculation, via DNA-based quantitative PCR and TRFLP fingerprinting. In both soils, 'Foxy-2' occasionally promoted total fungal abundance, while the community composition was mainly altered by and . Notably, 'Foxy-2' stimulated AMF abundance, while was suppressed by . Total fungal and AMF abundance were promoted by residues. In conclusion, 'Foxy-2' resulted in no adverse effects on indigenous rhizosphere fungal communities substantiating its environmental safety as BCA against .

摘要

我们研究了土壤传播的生物防治剂（BCA）——尖孢镰刀菌（Fos）对黏土和沙质土壤中玉米根际总真菌和丛枝菌根真菌（AMF）类群的影响。通过基于DNA的定量PCR和末端限制性片段长度多态性（TRFLP）指纹分析，评估了Fos-BCA“Foxy-2”在接种“Foxy-2”后14、28和42天对（1）尖孢镰刀菌的存在情况以及（2）用植物残体进行有机施肥的影响。在两种土壤中，“Foxy-2”偶尔会促进总真菌丰度，而群落组成主要受尖孢镰刀菌和植物残体的影响。值得注意的是，“Foxy-2”刺激了AMF丰度，而尖孢镰刀菌则受到植物残体的抑制。植物残体促进了总真菌和AMF的丰度。总之，“Foxy-2”对本地根际真菌群落没有不良影响，证实了其作为防治尖孢镰刀菌的生物防治剂的环境安全性。