Effects of Funneliformis mosseae on the fungal community and soil
properties in a continuously cropped soybean system
Abstract
Abstract: Root rot leads to a significant decline in the production and
quality of soybean, particularly in continuous cropping systems.
Therefore, it is important to explore methods and mechanisms for the
biocontrol of root rot pathogens. In this paper, the community structure
of fungi in the root and rhizosphere soil was determined by
high-throughput sequencing technology under non-inoculated and
Funneliformis mosseae-inoculated conditions. Moreover, redundancy
analysis (RNA) was used to analyse the effects of F. mosseae on the
community structure of fungi and the physical and chemical properties of
soil. In different samples (root and rhizosphere soil), the index of
fungal diversity in HN48 was higher than that in HN66, while that
without F. mosseae inoculation was slightly higher than that under
inoculation with F. mosseae in different years of continuous cropping.
Compared to non-inoculated plants, Fusarium oxysporum and
Rhizoctonia solani were the dominant fungi in different root samples of
soybean varieties. However, the predominant genera in the rhizosphere
soil samples shifted with inoculation and comprised Fusarium,
Mortierella, Cryptococcus, Guehomyces and Corynespora. Moreover, after
inoculation with F. mosseae, the relative abundance of F. oxysporum and
R. solani decreased in root and rhizosphere soils. Additionally, RDA
showed that the rhizosphere soil had significant differences depending
on F. mosseae inoculation, continuous cropping years, and soybean
varieties. This study provides new insights into the interactive effects
of arbuscular mycorrhizal fungi (AMF) and other fungi in continuously
cropped soybean systems.